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    NRHA Medications Database

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    Please Note: While we make every effort to ensure the NRHA Medications Database is current and accurate, in the event of any discrepancies or questions, the official source of record is the 2025 NRHA Animal Welfare & Medications Policy, as approved by the NRHA Board of Directors.

    ALL # A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
    Permitted Conditionally Permitted Banned
    • 1-androsterone
      Banned
      Click to expand
      Definition: Anabolic
    • 1,3-Dimethylamylamine
      Iron Tiger, Forthane, Geranamine, DMAA, Floradrene
      Banned
      Click to expand
      Definition: Sympathomimetic
    • 3β-Hydroxy-5α-androstan-17-one
      Banned
      Click to expand
      Definition: Anabolic
    • 4-chloromethandienone
      Banned
      Click to expand
      Definition: Anabolic
    • 5α-Androst-2-ene-17-one
      Banned
      Click to expand
      Definition: Anabolic
    • 5α-Androstane-3α,17α-diol
      Banned
      Click to expand
      Definition: Anabolic
    • 5α-Androstane-3α,17β-diol
      Banned
      Click to expand
      Definition: Anabolic
    • 5α-Androstane-3β,17α-diol
      Banned
      Click to expand
      Definition: Anabolic
    • 5α-Androstane-3β,17β-diol
      Banned
      Click to expand
      Definition: Anabolic
    • 5β-Androstane-3α,17β-diol
      Banned
      Click to expand
      Definition: Anabolic
    • 7-Keto-DHEA
      Banned
      Click to expand
      Definition: Anabolic
    • 7α-Hydroxy-DHEA
      Banned
      Click to expand
      Definition: Anabolic
    • 7β-Hydroxy-DHEA
      Banned
      Click to expand
      Definition: Anabolic
    • 17 alpha hydroxyprogesterone (in mares)
      Hydroxyprogesterone Caproate, Hydroxyprogesterone Hexanoate
      Conditionally Permitted
      Click to expand
      Definition: Hormone
      Information:
      17 alpha hydroxyprogesterone is a progestogen used suppress oestrus and maintain pregnancy in mares. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

      Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

      Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

    • 17 alpha hydroxyprogesterone (in stallions & geldings)
      Hydroxyprogesterone Caproate, Hydroxyprogesterone Hexanoate
      Banned
      Click to expand
      Definition: Anabolic
    • 17-hydroxyprogesterone hexanoate (in mares)
      Conditionally Permitted
      Click to expand
      Definition: Hormone
      Information:
      17-hydroxyprogesterone hexanoate may be used to synchronise oestrus in mares. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

      Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

      Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

    • 17-hydroxyprogesterone hexanoate (in stallions & geldings)
      Banned
      Click to expand
      Definition: Hormone
    • 19-Norandrosterone
      Banned
      Click to expand
      Definition: Anabolic
    • 19-Noretiocholanolone
      Banned
      Click to expand
      Definition: Anabolic
    • 20-Hydroxyecdysone
      Banned
      Click to expand
      Definition: Anabolic
    • Acebutolol2
      Sectral, Monitan, Rhotral, Pindalol, Neptall, Prent
      Banned
      Click to expand
      Definition: Beta blocker
    • Acefylline
      Etaphylline, Etophylate
      Banned
      Click to expand
      Definition: Bronchodilator
    • Acemetacin
      Emflex
      Banned
      Click to expand
      Definition: Non-steroidal anti-inflammatory drug
    • Acenocoumarol
      Sintrom, Sinthrome
      Banned
      Click to expand
      Definition: Anticoagulant
    • Acepromazine
      ACP, Sedalin Gel, Atrovet, PromAce, Notensil, Acetylpromazine
      Conditionally Permitted
      Click to expand
      Definition: Sedative
      Information:
      A complete and timely submitted Medications Report Form submitted to NRHA required. Not permitted in the horse's system within 24 hours of competition.

      Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

      Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

    • Acetaminophen (Paracetamol)
      Anacin3, Mersyndol, Panadol, Pardale-V, Syndol, Tempra, Tylenol
      Conditionally Permitted
      Click to expand
      Definition: Analgesic
      Information:
      Acetaminophen (Paracetamol) may be used to relieve pain and control fever. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

      Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

      Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

    • Acetanilid
      Antifebrin, Ethananalide, N-acetylanaline,2-Acetanalide
      Banned
      Click to expand
      Definition: Analgesic/antipyretic
    • Acetazolamide
      Acemit, Azomid, Diamox, Glaupax, Novo-Zolamide, Storzolamide
      Conditionally Permitted
      Click to expand
      Definition: Diuretic
      Information:
      Acetazolamide may be used in the control of seizures, glaucoma and oedema. A complete and timely submitted Medications Report Form submitted to NRHA required. Not permitted in the horse's system within 24 hours of competition.

      Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

      Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

    • Acetohexamide
      Dymelor
      Banned
      Click to expand
      Definition: Pancreatic stimulant
    • Acetophenazine
      Tindal, Fluphenazine
      Banned
      Click to expand
      Definition: Antipsychotic
    • Acetophenetidin (Phenacetin)
      Codempiral, Commotional, Contradouleur, Emprazil, P-A-C Compound, Paramette, Phenaphen Plus, Stellacyl, Thephorin A-C
      Banned
      Click to expand
      Definition: Analgesic
    • Acetylmorphine
      Trade names are not currently listed on this site.
      Banned
      Click to expand
      Definition: Narcotic
    • Adinazolam
      Deracyne, Adinazolam is available by generic name
      Banned
      Click to expand
      Definition: Anxiolytic
    • Adiphenine
      Spasnil oral, Fulton anti-douleur capsule
      Banned
      Click to expand
      Definition: Antispasmodic
    • Adrafinil
      Olmifon, Provigil, Vigil, Modasomil, Modiadal, Modalert, Provake, Resotyl, Alertex
      Banned
      Click to expand
      Definition: Stimulant
    • Adrenaline
      Adrenalin, Epinephrine, Anapen, Epipen, Twinject
      Banned
      Click to expand
      Definition: Hormone
    • Adrenochrome
      Kentucky Red, Adrenosem salicylate, Adrestat-F, Dot-Chrome-DS, Stadren, Adona, Golcort
      Banned
      Click to expand
      Definition: Haemostatic
    • Adrenocorticotrophic hormone (ACTH)
      ACTH
      Conditionally Permitted
      Click to expand
      Definition: Hormone
      Information:
      ACTH (Adrenocorticotrophic hormone) simulates the production of endongenous steroids. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

      Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

      Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

    • AICAR
      AICAR
      Banned
      Click to expand
      Definition: Anabolic
    • Albuterol (Salbutamol)
      Ventolin, Proventil, Torpex, Volmax, Ventipulmin
      Conditionally Permitted
      Click to expand
      Definition: Bronchodilator
      Information:
      Albuterol (salbutamol) may be used in the treatment of respiratory disease. A complete and timely submitted Medications Report Form submitted to NRHA required. Not permitted in the horse's system within 24 hours of competition.

      Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

      Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

    • Alclofenac
      Preservex, Prinalgin, Zumaril
      Banned
      Click to expand
      Definition: Non-steroidal anti-inflammatory drug
    • Alcuronium
      Alloferin, Acenkoumarol
      Banned
      Click to expand
      Definition: Muscle relaxant
    • Aldosterone
      Florinef, Aldocortin, Electrocortin
      Banned
      Click to expand
      Definition: Hormone
    • Alendronate
      Fosamax
      Banned
      Click to expand
      Definition: Bone metabolism agent
    • Alfentanil
      Alfenta, Rapifen
      Banned
      Click to expand
      Definition: Narcotic
    • Allopurinol
      Zyloprim, Aloprim, Zyloric, Progout, Alluline, Allohexal
      Banned
      Click to expand
      Definition: Xanthine oxidase inhibitor (anti-hyperuricaemia)
    • Almotriptan
      Almogran, Axert, Almogran, Sumatriptan
      Banned
      Click to expand
      Definition: 5-hydroxatryptamine agonist (antimigraine)
    • Alpha-Casozepine
      Zylkene
      Permitted
      Click to expand
      Definition: Sedative
      Information:
      A peptide originating from cows milk which has calming effects on horses.
    • Alphadolone acetate
      Althesin, Saffan
      Banned
      Click to expand
      Definition: Neurosteriod
    • Alphaprodine
      Maxitram, Ultram, Ryzolt, Ralivia, Zytram, Zamadol, Ultracet, Tramacet
      Banned
      Click to expand
      Definition: Opiod analgesic
    • Alpidem
      Ananxyl
      Banned
      Click to expand
      Definition: Anxiolytic
    • Alprazolam
      Xanax, Niravam, Alprazolam
      Banned
      Click to expand
      Definition: Anxiolytic
    • Alprenolol
      Regletin, Aptine
      Banned
      Click to expand
      Definition: Beta blocker
    • Althesin
      Saffan, Alfaxan
      Banned
      Click to expand
      Definition: IV anaesthetic
    • Althiazide
      Hydrochlorothiazide, Apresazide, Aldoril, Avalide, Capozide, Accuretic
      Banned
      Click to expand
      Definition: Diuretic
    • Altrenogest
      Regumate
      Permitted
      Click to expand
      Definition: Hormone
      Information:
    • Alverine
      Spasmonal, Profenil, Spasmine
      Banned
      Click to expand
      Definition: Antispasmodic
    • Amantadine
      Symmetrel, Lysovir, Endantadine
      Conditionally Permitted
      Click to expand
      Definition: Dopamine agonist
      Information:
      Amantadine may be used in the treatment of viruses and pain With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

      Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

      Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

    • Ambenonium
      Mytelase, Myeuran, Ambegon
      Banned
      Click to expand
      Definition: Cholinesterase inhibition
    • Ambroxol
      Mucosalvan, Ambril, Ambrosan, Amxol
      Conditionally Permitted
      Click to expand
      Definition: Mucolytic
      Information:
      Ambroxol may be used in the treatment of respiratory disease. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

      Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

      Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

    • Ambucetamide
      Neomeritine, Femerital, Dibutamide
      Banned
      Click to expand
      Definition: Antispasmodic
    • Amcinonide
      Cyclocort, Aminocide Cream
      Conditionally Permitted
      Click to expand
      Definition: Corticosteroid
      Information:
      Amcinonide reduces inflammation, swelling, itching and irritation associated with various skin disorders. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

      Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

      Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

    • Amfepramone
      Tenuate, Tepanil, Atractil
      Banned
      Click to expand
      Definition: Stimulant
    • Amfetaminil
      Aponeuron, Aphetaminil
      Banned
      Click to expand
      Definition: Stimulant
    • Amidephrine
      Dricol
      Banned
      Click to expand
      Definition: Vasoconstrictor
    • Amiloride
      Moduretic, Midamor, Safaretic tab, Amiloride, Amilamont oral solution, Moduretic, Actaris tab, Aminide tab
      Banned
      Click to expand
      Definition: Diuretic
    • Amineptine
      Survector
      Banned
      Click to expand
      Definition: Tricyclic antidepressant
    • Aminocaproic Acid
      Amicar, Caprocid, Hamostat tab, Hamostat inj, Hemocid injection
      Conditionally Permitted
      Click to expand
      Definition: Anti-fibrinolytic
      Information:
      Aminocaproic acid may be used in the treatment of bleeding disorders. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

      Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

      Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

    • Aminoglutehthamide
      Cytodren
      Banned
      Click to expand
      Definition: Aromatase inhibitor
    • Aminoheptane
      2-aminoheptane sulphate
      Banned
      Click to expand
      Definition: Vasopressor
    • Aminomethylbenzoic acid
      Trasylol tissue glue, Gumbix, AmBenamp, Fluka
      Banned
      Click to expand
      Definition: Anti-fibrinolytic
    • Aminophylline
      Ami-nesine, Ami-lone, Etamyphylline derivative, Millophylline-V, Dalophylline gel
      Conditionally Permitted
      Click to expand
      Definition: Bronchodilator
      Information:
      Aminophylline may be used in the treatment of respiratory diseases. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

      Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

      Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

    • Aminopicoline
      Picolamine 3MP
      Banned
      Click to expand
      Definition: Nitric oxide synthase inhibitor
    • Aminopromazine
      Jenotone
      Banned
      Click to expand
      Definition: Antispasmodic
    • Aminopterin
      Aminopterin sodium, Deoxyfolic acid sodium salt, Aantifolic acid, APGA
      Banned
      Click to expand
      Definition: Immunosuppressant
    • Aminorex
      Menocil
      Conditionally Permitted
      Click to expand
      Definition: Parasympathomimetic
      Information:
      Aminorex is a situmlant and a metabolite of levamisole, a Controlled Medication. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

      Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

      Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

    • Amiodarone
      Pacerone tablets, Nexterone injection, Cordarone-X injection, Amiodarone HCl tablets
      Conditionally Permitted
      Click to expand
      Definition: Anti-arrhythmic
      Information:
      Amiodarone may be used in the treatment of heart rhythm abnormalities. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

      Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

      Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

    • Amiphenazole
      Daptazile, Daftazole
      Banned
      Click to expand
      Definition: Stimulant
    • Amisometradine
      Aminoisometradine, Rolicton
      Banned
      Click to expand
      Definition: Diuretic
    • Amisulpride
      Solian, Amisulpride
      Banned
      Click to expand
      Definition: Antipsychotic
    • Amitriptylline
      Amitriptyline, Endep, Elavil, Elanil, Triptafen, Triaval, Amitone tab, Tryptamol tab, Qualitriptine tab
      Banned
      Click to expand
      Definition: Tricyclic antidepressant
    • Amlodipine
      Norvasc, Istin, Amlostin, Caduet, Lotral, Exforge
      Banned
      Click to expand
      Definition: Antihypertensive
    • Ammonium Chloride (injection)
      An inorganic compound with the formula NH4Cl.
      Banned
      Click to expand
      Definition: Acidifying agent
    • Ammonium Sulphate
      Banned
      Click to expand
      Definition: Nerve-blocking agent
    • Ammonium sulphide
      Banned
      Click to expand
      Definition: Nerve-blocking agent
    • Amobarbital
      Isomytal injection, Amytal Sodium, Amytal, Tuinal, Seconal Sodium Pulvules
      Banned
      Click to expand
      Definition: Sedative
    • Amodiaquine
      Camoquin, Basoquin, Camoquin, Flavoquin
      Banned
      Click to expand
      Definition: Antimalarial
    • Amopyroquine
      Propoquin
      Banned
      Click to expand
      Definition: Antimalarial
    • Amoxapine
      Amoxapine Tablets USP, Ascendin, Demolox, Mocadil
      Banned
      Click to expand
      Definition: Tricyclic antidepressant
    • Amperozide
      Hogpax
      Banned
      Click to expand
      Definition: Antipsychotic
    • Amphetamine
      Benzadrine, Adderall, Dexedrine, Speed
      Banned
      Click to expand
      Definition: Stimulant
    • Amphetaminil
      Trade names are not currently listed on this site.
      Banned
      Click to expand
      Definition: Stimulant
    • Ampyrone
      SolvapyrineA, Metapyrazone, Aminoazaphene, Pyronpac, Dipyrone
      Banned
      Click to expand
      Definition: Non-steroidal anti-inflammatory drug
    • Amrinone
      Inocor, Amrinone, Amrinone lactate
      Banned
      Click to expand
      Definition: Vasodilator
    • Amyl nitrate/nitrite
      Amyl Nitrite Aspirols, Amyl Nitrite Vaporole, Nitrit, Amyl Nitrosum
      Banned
      Click to expand
      Definition: Angina treatment
    • Amylocaine
      Amyleine
      Banned
      Click to expand
      Definition: Local anaesthetic
    • Anabolic Steroid Esters
      Banned
      Click to expand
      Definition: Anabolic
    • Anastrozole
      Arimidex
      Banned
      Click to expand
      Definition: Aromatase inhibitor
    • Andarine
      SARM S4, S4 Andarine
      Banned
      Click to expand
      Definition: Selective Androgen Receptor Modulator (SARM)
    • Androstanolone
      Banned
      Click to expand
      Definition: Anabolic
    • Androstenediol
      Neumune, Methandriol,5-AED
      Banned
      Click to expand
      Definition: Anabolic
    • Androstenedione
      Oxandrolone, Oxandrin, Oxymetholone, Anadrol, Nandoral, Retarbolin, Laurabolin, Stanozolol, Winstrol
      Banned
      Click to expand
      Definition: Anabolic
    • Androsterone
      Banned
      Click to expand
      Definition: Anabolic
    • Anileridrine
      Leritine, Adopol, Nipecotan
      Banned
      Click to expand
      Definition: Opiod analgesic
    • Anilopam
      Corlopam, Fenoldopam mesylate
      Banned
      Click to expand
      Definition: Central Nervous System stimulant
    • Anisindione
      Miradon
      Banned
      Click to expand
      Definition: Anticoagulant
    • Anisotropine
      Hyomax-SR, Lytispasm, Endovalpin,Valpin 50, Octatropine, Methyloctatropine bromide
      Banned
      Click to expand
      Definition: Anticholinergic
    • Antazoline
      Otrivine, Antistin
      Banned
      Click to expand
      Definition: Antihistamine
    • Antipyrine
      Allergan, Aurodex, Auroto, Benzotic, Otoalgan, Pro-Otic, Propyphenazone
      Banned
      Click to expand
      Definition: Non-steroidal anti-inflammatory drug
    • Apazone (Azapropazone)
      Rheumox, Prolixan, Tolyprin
      Banned
      Click to expand
      Definition: Non-steroidal anti-inflammatory drug
    • Apocodeine
      Trade names are not currently listed on this site.
      Banned
      Click to expand
      Definition: Opiod analgesic
    • Apomorphine
      Apokyn, Apo-Go, Apomorphine
      Banned
      Click to expand
      Definition: Opiod analgesic
    • Aprindine
      Amidonal, Aspenon, Fibocil, Fiboran, Ritmusin
      Banned
      Click to expand
      Definition: Anti-arrhythmic
    • Aprobarbital
      Alurate, Arbituric acid, Allylpropymal
      Banned
      Click to expand
      Definition: Sedative
    • Apronalide
      Sedormid, Isodermid
      Banned
      Click to expand
      Definition: Sedative
    • Arecoline
      Arecholin, Arecaline, Arekolin, Piperidine alkaloid
      Banned
      Click to expand
      Definition: Stimulant
    • Arformoterol
      COPD, Seprocor, Brovana, Foradil Aeriolizer, Formertorel
      Conditionally Permitted
      Click to expand
      Definition: Bronchodilator
      Information:
      Arformoterol nebularisers are used for maintenance treatment of chronic obstructive bronchial disease and emphysema to improve peak expiratory flow rates. Tolerance may develop, and also paradoxical bronchospasms. Mostly metabolised, excretion is by urine and faeces. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

      Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

      Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

    • Argon
      Banned
      Click to expand
      Definition: Hypoxia Inducible Factor Activator
    • Arsenic
      Trisenox, Caparsolate, Histostat, 3-nitro-roxarsone, Pro-Gen Plus, Roxarsone, Sodium Cacodylate solutions, Cocci-Bol-o-tab
      Banned
      Click to expand
      Definition: Stimulant/toxic
    • Articaine
      Septocaine, Septanest, Ubistesin,4%Articadent Dental, Deltazine, Bucanest, Septodont
      Banned
      Click to expand
      Definition: Local anaesthetic
    • Atenolol
      Temormin, Tenif, Beta-Adalat, Co-Tenidone, Tenolin
      Banned
      Click to expand
      Definition: Beta blocker
    • Atipamezole
      Antisedan, Revertor
      Conditionally Permitted
      Click to expand
      Definition: Alpha adrenergic antagonist
      Information:
      Atipamezole may be used to reverse the effects of sedation. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

      Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

      Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

    • Atomoxetine
      Strattera, Recit
      Banned
      Click to expand
      Definition: Selective noradrenaline re-uptake inhibitor
    • Atracurium
      Atracurium, Atracurium Opopharma, Gelolagar, Tracurix, Tracuran, Tracrium
      Banned
      Click to expand
      Definition: Muscle relaxant
    • Atropine
      Atropine, Atro Ofteno, Atropen, Atropinum, Atropisa, Endotropina, Klonatropina
      Banned
      Click to expand
      Definition: Anticholinergic
    • Azacyclonal
      Azacyclonol, Frenquel
      Banned
      Click to expand
      Definition: Antipsychotic
    • Azaperone
      Eucalmyl, Fluoperidol, Sedaperone Vet, Stresnil, Suicalm
      Banned
      Click to expand
      Definition: Sedative
    • Azapetine
      Ilidar
      Banned
      Click to expand
      Definition: Vasodilator
    • Azapropazone (Apazone)
      Cinnamin, Pentosol, Debelex, Prolix, Prolixan, Prolixana, Rheumox, Tolyprin, Sinnamin, Tulyprin, Xani
      Banned
      Click to expand
      Definition: Non-steroidal anti-inflammatory drug
    • Azatadine
      Azatadine, Idulamine, Idulian, Lergocil, Optimine, Trinalin, Verbén, Zadine
      Banned
      Click to expand
      Definition: Antihistamine
    • Azathioprine
      Azamun, Azarek, Azathioprine, Azopi, Imuprin, Satedon, Zytrim
      Conditionally Permitted
      Click to expand
      Definition: Immunosuppressant
      Information:
      Azathioprine may be used to suppress the immune system. A complete and timely submitted Medications Report Form submitted to NRHA required. Not permitted in the horse's system within 24 hours of competition.

      Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

      Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

    • Azosemide
      Banned
      Click to expand
      Definition: Diuretic
    • Baclofen
      Lioresal
      Banned
      Click to expand
      Definition: Antispasmodic
    • Bambuterol
      Bambec, Bambudil, Oxeol
      Banned
      Click to expand
      Definition: Bronchodilator
    • Bamifylline
      Airest, Bamifix, Bami-Med, Bamixol, Briofil, Trentadil
      Banned
      Click to expand
      Definition: Bronchodilator
    • Barbital
      Deba, Diemal, Diemalum, Dormonal, Hypnogene, Malonal, Sedeval, Uronal, Veroletten, Verolettin, Veronal, Vesperal
      Banned
      Click to expand
      Definition: Sedative
    • Beclamide
      Hibicon, Neuracen, Nydrane, Posedrine, Seclar
      Banned
      Click to expand
      Definition: Sedative
    • Beclomethasone
      Airbeclosona, Beclacin, Beclometason, Becloval, Clenil-A, Easyhaler Beclometasone, Entyderma, Inalone, Korbutone
      Conditionally Permitted
      Click to expand
      Definition: Corticosteroid
      Information:
      Beclomethasone is used for the management of asthma, and treatment of rhinitis and sinusitis. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

      Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

      Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

    • Bemegride
      Agipnon, Ahypnon, Antibarbi, Benegrid, Eukraton, Malysol, Megibal, Megimid, Megimide, Mikedimide, Zentraleptin
      Banned
      Click to expand
      Definition: Stimulant
    • Benactyzine
      Alin, Lucidex, Deprol
      Banned
      Click to expand
      Definition: Anticholinergic
    • Benapryzine
      Brizin
      Banned
      Click to expand
      Definition: Anticholinergic
    • Benazepril
      Apo-Benazepril, Benace, Benazepril, Boncordin, Briem, Cibace, Cibacen, Cibacene, Fortekor, Lotensin, Lotrel, Tensanil, Zinadril
      Banned
      Click to expand
      Definition: Antihypertensive
    • Bendroflumethazide
      Aprinox, Neo-NaClex
      Banned
      Click to expand
      Definition: Diuretic
    • Benorilate
      Benorilate
      Banned
      Click to expand
      Definition: Non-steroidal anti-inflammatory drug
    • Benoxaprofen
      Oraflex, Opren
      Banned
      Click to expand
      Definition: Non-steroidal anti-inflammatory drug
    • Benoxinate
      Minims Benoxinate, Fluress, Opulets Benoxinate, Prescaina, Novesina, Novesin
      Banned
      Click to expand
      Definition: Local anaesthetic
    • Benperidol
      Anquil, Benquil, Concilium, Frenactil, Frenactyl, Glianimon, Glianimon Mite, Psicoben
      Banned
      Click to expand
      Definition: Antipsychotic
    • Bentazepam
      Tiadipona
      Banned
      Click to expand
      Definition: Anxiolytic
    • Benzocaine (Ethyl Aminobenzoate)
      Americaine, Anaestherit, Anbesol, Capacol, Numzident, Orajel, SensoGARD, Sirop Dentition, Slim Mint, Topicaine, Zilabrace
      Conditionally Permitted
      Click to expand
      Definition: Local anaesthetic
      Information:
      Benzocaine is used for the temporary local relief of pain. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

      Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

      Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

    • Benzoctamine
      Tacitin
      Banned
      Click to expand
      Definition: Sedative
    • Benzonatate
      Tessalon Perles, Tessalon capsules
      Banned
      Click to expand
      Definition: Antitussive
    • Benzoylecgonine
      Esterom
      Banned
      Click to expand
      Definition: Stimulant/cocaine metabolite
    • Benzphetamine
      Didrex
      Banned
      Click to expand
      Definition: Stimulant
    • Benzquinamide
      Emeticon, Promecon, Quantril, Quantryl
      Banned
      Click to expand
      Definition: Antihistamine
    • Benzthiazide
      Dytide, Dyrenium Compositum
      Banned
      Click to expand
      Definition: Diuretic
    • Benztropine
      Cogentin
      Banned
      Click to expand
      Definition: Anticholinergic
    • Benzydamine
      Tantum Verde, Difflam, Benflogin, Androlex, Androlex-C
      Banned
      Click to expand
      Definition: Non-steroidal anti-inflammatory drug
    • Benzylpiperazine
      Trade names are not currently listed on this site.
      Banned
      Click to expand
      Definition: Stimulant
    • Bepridil
      Vascor, Bepadin
      Banned
      Click to expand
      Definition: Calcium channel blocker
    • Betamethasone
      Bebyderm, Becort, Bedifos, Betacorlan, Betacortril, Betafoam, Betagen, Betamamallet, Betamethason, Betapred, Betasolon, Betnasol, Betsolan, Celestamine N, Celestene, Celestone, Cevicort, Coritex, Cortimar, Flubenisolone, Hormezon, Konicortil, Luxiqo, Medobeta, Methazon, Steromien
      Conditionally Permitted
      Click to expand
      Definition: Corticosteroid
      Information:
      Betamethasone is used as an anti-inflammatory and anti-allergic agent for the treatment of dermatological, rheumatic and allergic diseases. The detection time is estimated with 168 hours (7 days) for intra articular administration. Please remember: A detection time is not the same as a withdrawal time. The detection time is the approximate period of time for which a substance (or its metabolite) remains in a horse's system such that it can be detected by the laboratory. The withdrawal time for a substance adds a safety margin, chosen with professional judgment and discretion to allow for individual differences between horses such as size, metabolism, degree of fitness, recent illness or disease etc. You are advised to seek suitable advice from your treating veterinarian. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

      Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

      Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

    • Betaprodine
      Prisilidine, Nisentil
      Banned
      Click to expand
      Definition: Opiod analgesic
    • Betaxolol
      Betoptic, Betoptic S, Lokren, Kerlone
      Banned
      Click to expand
      Definition: Beta blocker
    • Bethanechol
      Duvoid, Myotonachol, Urecholine
      Banned
      Click to expand
      Definition: Parasympathomimetic
    • Bethanidine
      Batel, Benzoxine, Betaling, Bethanid, Esbatal, Eusmanid, Hypersin
      Banned
      Click to expand
      Definition: Antihypertensive
    • Biperiden
      Akineton, Akinophyl, Bikipen, Darcipireno, Roloken, Sinekin
      Banned
      Click to expand
      Definition: Anticholinergic
    • Biphenamine
      Biphenamine hydrochloride, Salol, Sébaklen
      Banned
      Click to expand
      Definition: Non-steroidal anti-inflammatory drug
    • Biriperone
      Trade names are not currently listed on this site.
      Banned
      Click to expand
      Definition: Antipsychotic
    • Bisoprolol
      Bisoprolol, Cardicor, Emcor, Fondril, Vivacor
      Banned
      Click to expand
      Definition: Beta blocker
    • Bitolterol
      Tornalate, Bitolterol
      Banned
      Click to expand
      Definition: Bronchodilator
    • Bolandiol
      Anabiol
      Banned
      Click to expand
      Definition: Anabolic
    • Bolasterone
      Myagen
      Banned
      Click to expand
      Definition: Anabolic
    • Boldenone
      Equipoise, Ganabol, Equigan, Ultragan
      Banned
      Click to expand
      Definition: Anabolic
    • Boldione
      Trade names are not currently listed on this site.
      Banned
      Click to expand
      Definition: Anabolic
    • Bretylium
      Darenthin, Darentin, Ornid
      Banned
      Click to expand
      Definition: Anti-arrhythmic
    • Brimonidine
      Alphagan, Apo-Brimonidine, Enidin, Oftalmotonil
      Banned
      Click to expand
      Definition: Occular antihypertensive
    • Brinzolamide
      Azopt, Azoptic
      Conditionally Permitted
      Click to expand
      Definition: Diuretic
      Information:
      Brinzolamide may be used to reduce intraocular pressure in the treatment of glaucoma. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

      Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

      Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

    • Bromantan
      Trade names are not currently listed on this site.
      Banned
      Click to expand
      Definition: Stimulant
    • Bromazepam
      Lexotan, Brazepam, Bromaze, Lectopam
      Banned
      Click to expand
      Definition: Anxiolytic
    • Bromfenac
      Bronuck, Duract, Xibrom
      Banned
      Click to expand
      Definition: Non-steroidal anti-inflammatory drug
    • Bromhexine
      Brometix, Bromexidryl, Bronacim, Broncocalmine, Brondilax, Catarrosine, Clarus, Dibroxin, Expectosan Extra Forte, Flumed, Funciobron B, Inquixol, Lisi-Tos, Lubrirhin, Namir, Pectoral Pagliano, Tolmix, Toridran-N, Toscalmin, Tostop
      Conditionally Permitted
      Click to expand
      Definition: Mucolytic
      Information:
      Bromhexine may be used in the treatment of respiratory disease. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

      Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

      Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

    • Bromisovalum
      Corvalol
      Banned
      Click to expand
      Definition: Sedative
    • Bromocriptine
      Parlodel
      Banned
      Click to expand
      Definition: Dopamine agonist
    • Bromodiphenhydramine
      Amodryl, Bromanautine, Bromo-Benadryl, Bromo-Benzdryl, Deserol, Histabromamine, Neo-Benadryl
      Banned
      Click to expand
      Definition: Antihistamine
    • Bromophenethylamine
      4-Bromophenethylamine
      Banned
      Click to expand
      Definition: Psychedelic
    • Bromperidol
      Bromidol, Impromen, Tesoprel
      Banned
      Click to expand
      Definition: Antipsychotic
    • Brompheniramine
      Bromfed, Dimetapp, Bromfenex, Dimetane
      Conditionally Permitted
      Click to expand
      Definition: Antihistamine
      Information:
      Brompheniramine may be used in the control of allergies. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

      Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

      Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

    • Brotizolam
      Bondormin, Brotizolam, Dormex, Indormyl, Ladormin, Lendorm, Lendormin, Lendormine, Lindormin, Maderantil, Nimbisan, Noctilan, Sintonal
      Banned
      Click to expand
      Definition: Anxiolytic
    • Bucetin
      Betadid
      Banned
      Click to expand
      Definition: Analgesic/antipyretic
    • Buclizine
      Aphilan R, Bucladin, Longifene, Migraleve, Postafen
      Banned
      Click to expand
      Definition: Antihistamine
    • Budesonide
      Rhinocort, Pulmicort, Entocort, Noex
      Conditionally Permitted
      Click to expand
      Definition: Corticosteroid
      Information:
      Budesonide is used to treat non-infectious rhinitis and nasal polyps. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

      Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

      Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

    • Bufexamac
      Allergipuran N, Droxaryl, Duradermal, Ekzemase, Malipuran, Parfenac, Viafen
      Banned
      Click to expand
      Definition: Non-steroidal anti-inflammatory drug
    • Buflomedil
      Bufedil, Buflan, Defluina, Flomed, Fonzylane, Irrodan, Lofton, Loftyl, Sinoxis
      Banned
      Click to expand
      Definition: Vasoactive agent
    • Bufotenine
      Trade names are not currently listed on this site.
      Banned
      Click to expand
      Definition: Naturally occurring hallucinogen
    • Bumetanide
      Aquazone, Bumex, Burinex, Butinat, Cambiex, Diurama, Farmadiuril, Fontego, Fordiuran, Lunetoron
      Banned
      Click to expand
      Definition: Diuretic
    • Bunitrolol
      Betrilol, Stresson
      Banned
      Click to expand
      Definition: Beta adrenergic antagonist
    • Bunolol
      Ophtho-Bunolol
      Banned
      Click to expand
      Definition: Beta blocker
    • Buphenine (Nylidrin)
      Arlibide, Arlidin, Diatolil, Dilatol, Dilydrin, Dilydrine Retard, Opino, Penitardon, Perdilatal Forte, Tocodilydrin, Tocodrine
      Banned
      Click to expand
      Definition: Sympathomimetic
    • Bupivacaine
      Bupivacaine, Carbostesin, Duracaina, Marcaine, Sensorcaine
      Conditionally Permitted
      Click to expand
      Definition: Local anaesthetic
      Information:
      Bupivacaine is used for the temporary local relief of pain. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

      Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

      Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

    • Bupranolol
      Betadrenol, Ophtorenin
      Banned
      Click to expand
      Definition: Beta blocker
    • Buprenorphine
      Buprenex, Buprenorphine, Finibron, Prefin, Temgesic
      Conditionally Permitted
      Click to expand
      Definition: Opioid
      Information:
      Buprenorphine may be used to relieve pain With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

      Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

      Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

    • Bupropion
      Wellbutrin
      Banned
      Click to expand
      Definition: Antidepressant
    • Buspirone
      Ansial, Ansiced, Anxiolan, Axoren, BuSpar, Buspirone, Loxapin, Pasrin, Tendan
      Banned
      Click to expand
      Definition: Anxiolytic
    • Butabarbital
      Buticaps, Butisol, Ciprial, Mebutal, Paxital, Prelital
      Banned
      Click to expand
      Definition: Sedative
    • Butacaine
      Bal, Relaxoddi
      Banned
      Click to expand
      Definition: Local anaesthetic
    • Butalbital
      Axocet, Fioricet, Axotal, Fiorinal
      Banned
      Click to expand
      Definition: Sedative
    • Butamben
      Butamben, Homeodose, Nestosyl, Prurex, Topicaina
      Banned
      Click to expand
      Definition: Nerve blocker
    • Butanilicaine
      Hostacain
      Banned
      Click to expand
      Definition: Local anaesthetic
    • Butaperazine
      Emerex, Megalectil, Randolectil, Repoise
      Banned
      Click to expand
      Definition: Antipsychotic
    • Butoctamide
      Listomin
      Banned
      Click to expand
      Definition: Serotonin release stimulation
    • Butofilolol
      Cafide
      Banned
      Click to expand
      Definition: Beta blocker
    • Butorphanol
      Beforal, Butorphanol, Butrum, Moradol, Stadol, Torbugesic, Torbutrol, Verstadol
      Banned
      Click to expand
      Definition: Opioid
    • Butoxycaine
      Stadacain
      Banned
      Click to expand
      Definition: Local anaesthetic
    • Butylscopolamine
      Buscopan
      Conditionally Permitted
      Click to expand
      Definition: Anticholinergic
      Information:
      Butylscopolamine may be used to treat spasms within the digestive tract. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

      Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

      Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

    • Cafedrine
      Akrinor, Bifort, Praxinor
      Banned
      Click to expand
      Definition: Analeptic
    • Caffeine
      Horse Power X, Exceed
      Banned
      Click to expand
      Definition: Stimulant
    • Calcium Dobesilate
      Dexium, Dobesifar, Doxium
      Conditionally Permitted
      Click to expand
      Definition: Vasoprotective
      Information:
      Calcium dobesilate may be used in the treatment of orthpaedic disease. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

      Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

      Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

    • Calusterone
      Methosorb
      Banned
      Click to expand
      Definition: Anabolic
    • Camazepam
      Paxor, Albego, Limpidon
      Banned
      Click to expand
      Definition: Anxiolytic
    • Canagliflozin
      Invokana
      Conditionally Permitted
      Click to expand
      Definition: Anti-hyperglycaemic
      Information:
      Canagliflozin may be used in the treatment of equine metabolic syndrome. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

      Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

      Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

    • Candesartan
      Amias, Atcand, Ratacand, Blopress
      Banned
      Click to expand
      Definition: Antihypertensive
    • Cannabidiol (CBD, CBDA)
      Epidiolex, Epidyolex
      Conditionally Permitted
      Click to expand
      Definition: Cannabinoid
      Information:
      Cannabidiol (CBD, CBDA) may be used in the control of pain and neurological disorders. Complete and timely filed medications report form submitted to NRHA required. Not permitted in the horse's system within 24-hours of competing.

      Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

      Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

    • Cannabis - natural cannabinoids (except for cannabidiol), synthetic cannabinoids and other cannabimimetcs
      Sativex, Marinol, Cesamet
      Banned
      Click to expand
      Definition: Psychotropic
    • Canrenone
      Inspra
      Banned
      Click to expand
      Definition: Diuretic
    • Capsaicin
      Axsain, Benejoint, Capsaicin, Capsicin, Capsig, Dolorac, Hansaterm, Theragen, Zostrix
      Banned
      Click to expand
      Definition: Topical analgesic/irritant
    • Captodiame
      Covatine, Covatix
      Banned
      Click to expand
      Definition: Anxiolytic
    • Captopril
      Capoten, Capolen
      Conditionally Permitted
      Click to expand
      Definition: Angiotensin-converting enzyme inhibitor
      Information:
      Captopril may be used to treat hypertension and heart failure. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

      Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

      Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

    • Caramiphen
      Ordrine AT, Rescaps-D, Tuss Vernade
      Banned
      Click to expand
      Definition: Anticholinergic
    • Carazolol
      Carbacel, Conducton
      Banned
      Click to expand
      Definition: Beta blocker
    • Carbachol
      Doryl, Carbastat, Carboptic, Miostat
      Banned
      Click to expand
      Definition: Parasympathomimetic
    • Carbamazepine
      Tegretol, Biston
      Conditionally Permitted
      Click to expand
      Definition: Anticonvulsant
      Information:
      Carbamazepine may be used in the control of headshaking. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

      Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

      Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

    • Carbazochrome
      Adrenoplasma, Adrenoxil, Adrenoxyl, Adrezon, Cromoxin, Siochrome Injections, Styptocid Injections
      Banned
      Click to expand
      Definition: Haemostatic
    • Carbetapentane (Pentoxyverine)
      Balsoclase, Germapect, Merol, Pectosan Toux Seche, Sirop Pectoral Vicks, Toclase Toux Seche, Tussa-Tablinen, Vicks Pectoral
      Banned
      Click to expand
      Definition: Antitussive
    • Carbidopa
      Lodosyn, Sinemet
      Banned
      Click to expand
      Definition: Di hydroxythenylalanine decarboxylase inhibitor
    • Carbimazole
      Athyromazole, Basolest, Camazol, Carbimazol, Carbistad, Cazole, Neo-Mercazole, NeoMercazole, Neo-Morphazole, Neo-Tireol, Neo Tomizol
      Banned
      Click to expand
      Definition: Antihyperthyroidism
    • Carbinoxamine
      Clistin, Palgic
      Banned
      Click to expand
      Definition: Antihistamine
    • Carbon Dioxide (CO2)
      Conditionally Permitted
      Click to expand
      Definition: Inorganic Compound
      Information:
      Carbon dioxide may be used in the treatment of metabolic disorders and wounds. Carbon dioxide is a Threshold Substance. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

      Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

      Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

    • Carbromal
      Adalin, Diacid, Mirfudorm
      Banned
      Click to expand
      Definition: Sedative
    • Carbuterol
      Broncotrate, Bronsecur, Dynavent, Pirem, Rispran
      Banned
      Click to expand
      Definition: Bronchodilator
    • Carfentanil
      Wildnil
      Banned
      Click to expand
      Definition: Opiod analgesic
    • Carisoprodol
      Soma-tabs
      Banned
      Click to expand
    • Carphedon (Phenylpiracetam)
      Phenotropil
      Banned
      Click to expand
      Definition: Stimulant
    • Carphenazine
      Procethazine, Proketazin, Proketazine
      Banned
      Click to expand
      Definition: Antipsychotic
    • Carpipramine
      Prazinil, Defekton
      Banned
      Click to expand
      Definition: Anxiolytic
    • Carprofen
      Imadyl, Rimadyl
      Banned
      Click to expand
      Definition: Non-steroidal anti-inflammatory
    • Carteolol
      Cartrol, Ocupress, Teoptic, Arteolol, Arteoptic, Calte, Cartéabak, Carteol, Cartéol, Cartrol, Elebloc, Endak, Glauteolol, Mikelan, Poenglaucol, Singlauc
      Banned
      Click to expand
      Definition: Beta blocker
    • Carticaine
      Articaine, Septocaine, Ultracaine
      Banned
      Click to expand
      Definition: Local anaesthetic
    • Carvedilol
      Coreg, Dilatrend, Eucardic, Carloc, Coreg CR
      Banned
      Click to expand
      Definition: Beta blocker
    • Cathine (Norpseudoephedrine)
      Amorphan, Appetrol, Dietene, Miniscap, Nobese, Thinz
      Banned
      Click to expand
      Definition: Stimulant
    • CBD (Cannabidiol; CBDA)
      Banned
      Click to expand
      Definition: Cannabinoid
    • CBDA (CBD; Cannabidiol)
      Banned
      Click to expand
      Definition: Cannabinoid
    • Celecoxib
      Celebrex, Celebra, Onsenal
      Banned
      Click to expand
      Definition: Non-steroidal anti-inflammatory drug
    • Celiprolol
      Cardem, Celectol, Celipres, Celipro, Celol, Cordiax, Dilanorm, Selectol
      Banned
      Click to expand
      Definition: Beta blocker
    • Cephaeline
      Ipecac
      Banned
      Click to expand
      Definition: Emetic
    • Ceterizine (Cetirizine)
      Cetryn, Hitrizin, Setir, Virlix, Ziptek, Zirtek, Zyrlex, Zyrtec
      Permitted
      Click to expand
      Definition: Antihistamine
      Information:
      Ceterizine may be used in the control of allergies and is the active metabolite of hydroxyzine.
    • Chloral betaine
      Beta-Chlor, Welldorm
      Banned
      Click to expand
      Definition: Sedative
    • Chloral hydrate
      Aquachloral, Chloradorm, Chloraldurat, Chloralex, Chloralvan, Dormel, Equithesin, Novo-Chlorhydrate, Rectules
      Banned
      Click to expand
      Definition: Sedative
    • Chloralbutanol
      Trade names are not currently listed on this site.
      Banned
      Click to expand
      Definition: Topical analgesic
    • Chlorcyclizine
      Alergicide, Di-Paralen, Diparalene, Eramide, Histantine, Perazil, Perazyl, Piparalene
      Banned
      Click to expand
      Definition: Antihistamine
    • Chlordiazepoxide
      Klopoxid, Librax, Libritabs, Librium, Mesural, Multum, Novapam, Risolid, Silibrin, Sonimen, Tropium, Zetran
      Banned
      Click to expand
      Definition: Anxiolytic
    • Chlormadinone acetate
      Banned
      Click to expand
      Definition: Hormone - progestagen
    • Chlormerodrin
      Chlormerodrin HG 197, Diurone, Katonil, Mercardox, Mercloran, Mercoral, Merculest, Merilid, Neogidrin, Neohydrin, Oricur, Promeran, Promerane
      Banned
      Click to expand
      Definition: Diuretic
    • Chlormethiazole
      Distraneurin, Hemineurin, Heminevrin
      Banned
      Click to expand
      Definition: Sedative
    • Chlormezanone
      Alinam, Fenarol, Lyseen New, Miorilax, Myoflex, Trancopal, Tranrilax
      Banned
      Click to expand
      Definition: Anxiolytic
    • Chloroform
      Freon 20, Esoform Alcolico, Esoform, Freezex Hoof Freeze, Sekumatic, Stom-Antiba, Stomyteol, Vicks Acta Plus
      Banned
      Click to expand
      Definition: Sedative
    • Chlorophenesin
      Adermykon, Demykon, Gechophen, Maolate, Mycil
      Banned
      Click to expand
      Definition: Muscle relaxant
    • Chlorophenyl piperazine
      Trade names are not currently listed on this site.
      Banned
      Click to expand
      Definition: Psychoactive
    • Chloroprocaine
      Nesacaine, Nesacaine-MPF
      Banned
      Click to expand
      Definition: Local anaesthetic
    • Chloropyramine
      Avapena, Allergan S, Anaphylline, Nilfan, Sinopen, Suprastin, Synopen, Synopen R, Synpen
      Banned
      Click to expand
      Definition: Antihistamine
    • Chloroquine
      Avlochlor, Chloroin, Resorchin, Sanoquin, Trochin
      Banned
      Click to expand
      Definition: Antimalarial
    • Chlorothiazide (Chlorthiazide)
      Azide, Chlotride, Diuril Boluses, Flumen, Lyovac Diuril, Saluretil, Saluric, SK-Chlorothiazide
      Conditionally Permitted
      Click to expand
      Definition: Diuretic
      Information:
      Chlorothiazide (chlorothiazide) may be used in the control of hypotension and oedema. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

      Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

      Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

    • Chlorpheniramine
      Alerdil, Allergex, Allergican, Apomin, Chlor-Trimeton, Chlorphen-12, Chloropiril, Chlorphenamine, Hayleve, Methyrit, Piriton, Prodel, Teldrin Allergy
      Conditionally Permitted
      Click to expand
      Definition: Antihistamine
      Information:
      Chlorpheniramine may be used in the control of allergies. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

      Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

      Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

    • Chlorphenoxamine
      Clorevan, Spirbon, Systral, Systrason, Ultratussin
      Banned
      Click to expand
      Definition: Antipruritic
    • Chlorphentermine
      Apsedon, Desopimon, Lucofen
      Banned
      Click to expand
      Definition: Stimulant
    • Chlorproethazine
      Neuriplege
      Banned
      Click to expand
      Definition: Antihistamine
    • Chlorpromazine
      Thorazine, Largactil
      Banned
      Click to expand
      Definition: Sedative
    • Chlorpropamide
      Bioglumin, Chloronase, Clordiabet, Diabemide, Diabenal, Diabet, Diabines, Diabinese, Gliconorm, Glucamide, Glymese, Hypomide, Insulase, Millinese, Normoglic, Novo-Propamide, Stabinol
      Banned
      Click to expand
      Definition: Antidiabetic
    • Chlorprothixene
      Tactaran, Tarasan, Truxal, Vetacalm
      Banned
      Click to expand
      Definition: Antipsychotic
    • Chlorthalidone
      Axamin, Higrotona, Hydro-Long, Hydroton, Igroton, Novo-Thalidone, Odemo-Genat, Renidone, Renon, Thalitone, Uridon, Urolin, Zambesil
      Banned
      Click to expand
      Definition: Diuretic
    • Chlorthenoxazine
      Apirogen, Betix, Ossazin, Ossazone, Ossipirina, Reugaril, Reulin, Reumital
      Banned
      Click to expand
      Definition: Non-steroidal anti-inflammatory drug
    • Chlorthiazide (Chlorothiazide)
      Azide, Chlotride, Diuril Boluses, Flumen, Lyovac Diuril, Saluretil, Saluric, SK-Chlorothiazide
      Conditionally Permitted
      Click to expand
      Definition: Diuretic
      Information:
      Chlorothiazide (chlorothiazide) may be used in the control of hypotension and oedema. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

      Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

      Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

    • Chlorzoxazone
      Muscol, Parafon Forte, Paraflex
      Banned
      Click to expand
      Definition: Muscle relaxant
    • Ciclesonide
      Alvesco, Omnaris, Omniair, Aservo EquiHaler
      Conditionally Permitted
      Click to expand
      Definition: Corticosteroid
      Information:
      Ciclesonide is used in the control of allergic disease e.g. asthma. The detection time is estimated with 120 hours (5 days) after inhalational administration. A detection time is not the same as a withdrawal time. The detection time is the approximate period of time for which a substance (or its metabolite) remains in a horses system such that it can be detected by the laboratory. The withdrawal time for a substance adds a safety margin, chosen with professional judgment and discretion to allow for individual differences between horses such as size, metabolism, degree of fitness, recent illness or disease etc.. You are advised to seek suitable advice from your treating veterinarian. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

      Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

      Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

    • Cicloprofen
      Trade names are not currently listed on this site.
      Banned
      Click to expand
      Definition: Non-steroidal anti-inflammatory drug
    • Cilazapril
      Inhibace
      Banned
      Click to expand
      Definition: Antihypertensive
    • Cilostazol
      Pletal
      Banned
      Click to expand
      Definition: Vasodilator
    • Cimaterol
      Cimaterol LD50
      Banned
      Click to expand
      Definition: Beta agonist
    • Cinchocaine
      Proctosedyl, Cincain, Nupercainal, Nupercaine, Sovcaine
      Banned
      Click to expand
      Definition: Local anaesthetic
    • Cinchophen
      Atophan, Quinophan, Phenaquin
      Banned
      Click to expand
      Definition: Non-steroidal anti-inflammatory drug
    • Cinnarizine
      Stugeron, Stunarone
      Banned
      Click to expand
      Definition: Antihistamine
    • Citalopram
      Trade names are not currently listed on this site.
      Banned
      Click to expand
      Definition: Antidepressant
    • Clanobutin
      Conditionally Permitted
      Click to expand
      Definition: Choleretic
      Information:
      Clanobutin may be used in the management of digestive tract diseases With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

      Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

      Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

    • Clemastine
      Agasten, Dexa Tavegil, Meclastin, Mecloprodin, Tavegil, Tavegyl
      Banned
      Click to expand
      Definition: Antihistamine
    • Clemizole
      Alercur, Allerpant, Histacur, Histakool
      Banned
      Click to expand
      Definition: Antihistamine
    • Clenbuterol (Ventipulmin)
      Bronq-C, Broncodil, Clenasma, Cesbron, Clenbutol, Contrasmina, Monores, Prontovent, Spiropent
      Conditionally Permitted
      Click to expand
      Definition: Bronchodilator
      Information:
      Clenbuteral may be used in the treatment of respiratory diseases. The detection time is estimated with 168 hours (7 days) after oral administration. A detection time is not the same as a withdrawal time. The detection time is the approximate period of time for which a substance (or its metabolite) remains in a horse's system such that it can be detected by the laboratory. The withdrawal time for a substance adds a safety margin, chosen with professional judgment and discretion to allow for individual differences between horses such as size, metabolism, degree of fitness, recent illness or disease etc.. You are advised to seek suitable advice from your treating veterinarian. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

      Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

      Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

    • Clibucaine
      Batramycine, Batrax
      Banned
      Click to expand
      Definition: Local anaesthetic
    • Clidinium
      Librax, Quarezan, Clindex
      Banned
      Click to expand
      Definition: Anticholinergic
    • Clobazam
      Frisium, Urbanol
      Banned
      Click to expand
      Definition: Anxiolytic
    • Clobenzorex
      Asenlix, Dinintel, Finedal, Rexigen
      Banned
      Click to expand
      Definition: Stimulant
    • Clobetasol
      Cantril, Clobetasolpropionat Mikron, Koniderm
      Conditionally Permitted
      Click to expand
      Definition: Corticosteroid
      Information:
      Clobetasol is used in the treatment of various skin disorders. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

      Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

      Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

    • Clocapramine
      Clofekton
      Banned
      Click to expand
      Definition: Antidepressant
    • Clocortolone
      Cloderm Cream
      Banned
      Click to expand
      Definition: Corticosteroid
    • Clodronate
      Osphos
      Conditionally Permitted
      Click to expand

      Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

      Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

    • Clodronate Disodium
      Conditionally Permitted
      Click to expand

      Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

      Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

    • Clodronic Acid
      Osphos
      Conditionally Permitted
      Click to expand
      Definition: Bisphosphonate
      Information:
      Clodronic acid may be used in the treatment of orthopaedic disease. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

      Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

      Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

    • Clofenamid
      Trade names are not currently listed on this site.
      Banned
      Click to expand
      Definition: Carbonate anhydrase inhibitor
    • Clomethiazole
      Chloro-S.C.T.Z., Distraneurin, Emineurina, Heminevrin, Somnevrin
      Banned
      Click to expand
      Definition: Sedative
    • Clomiphene
      Clomid, Serophene, Milophene
      Banned
      Click to expand
      Definition: Oestrogen receptor modulator
    • Clomipramine (Clomiprimine)
      Anafranil, Clopress, Maronil, Tranquax, Zoiral
      Banned
      Click to expand
      Definition: Antihistamine
    • Clomiprimine (Clomipramine)
      Anafranil, Clopress, Maronil, Tranquax, Zoiral
      Banned
      Click to expand
      Definition: Antidepressant
    • Clonazepam
      Klonopin, Ravotril, Rivotril, Rivatril
      Banned
      Click to expand
      Definition: Anxiolytic
    • Clonidine
      Catapres, Catarpresan, Catarpres-TTS, Clonistada, Dixarit, Ipotensium, Isoglaucon
      Conditionally Permitted
      Click to expand
      Definition: Antihypertensive
      Information:
      Clonidine may be used as a sedative or in the treatment of pain. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

      Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

      Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

    • Clonixin
      Clonix, Dolalgial, Dorixina, Traumicid
      Banned
      Click to expand
      Definition: Non-steroidal anti-inflammatory drug
    • Clopamide
      Adurix, Aquex, Brinaldix
      Banned
      Click to expand
      Definition: Dopamine antagonist
    • Clopidogrel
      Plavix
      Conditionally Permitted
      Click to expand
      Definition: Anti-platelet agent
      Information:
      Clopridogrel may be used to prevent abnormal blood clot formation. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

      Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

      Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

    • Cloranolol
      Tobanum
      Banned
      Click to expand
      Definition: Beta blocker
    • Clorazepate
      Tranxene, Novo-Clopate, Clorazepate
      Banned
      Click to expand
      Definition: Anxiolytic
    • Clormecaine
      Placacid
      Banned
      Click to expand
      Definition: Local anaesthetic
    • Clorprenaline
      Asthone, Bazarl, Broncon, Cosmoline, Effectol, Calutein, Pentadoll, Restanolon
      Banned
      Click to expand
      Definition: Antihistamine
    • Clostebol
      Anabolit, Macrobin, Stearanabol, Sterabol, Test-Anabol, Testomed, Trofodermin-S, Turinabol
      Banned
      Click to expand
      Definition: Anabolic
    • Clothiapine
      Entumin, Entumine, Etomine, Etumina, Etumine
      Banned
      Click to expand
      Definition: Antidepressant
    • Clotiazepam
      Clozan, Distensan, Trecalmo, Rize, Rizen, Veratran
      Banned
      Click to expand
      Definition: Anxiolytic
    • Cloxazolam
      Sepazon, Olcadil, Akton, Lubalix
      Banned
      Click to expand
      Definition: Anxiolytic
    • Clozapine
      Clozaril, Leponex, Fazaclo, Froidir, Denzapine, Zaponex, Klozapol, Clopine
      Banned
      Click to expand
      Definition: Antipsychotic
    • Cobalt
      Conditionally Permitted
      Click to expand
      Definition: Chemical element
      Information:
      Cobalt is naturally occurring but also found in vitamin and mineral supplements as Vitamin B12. It may be used to increase the number of red blood cells and haemoglobin. Cobalt is a Threshold Substance. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

      Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

      Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

    • Cocaine
      Trade names are not currently listed on this site.
      Banned
      Click to expand
      Definition: Stimulant/local anaethestic
    • Codeine
      Analgiol, Bronchoforton Kodeinsaft, Codicaps, Codicept, Codiforton, Codocalyptol, Coducept, Eulyptan, Pneumogenol, Tussipect Mono
      Banned
      Click to expand
      Definition: Opioid
    • Colchicine
      Colchicine, Colcin, Colgout, Goutichine, Prochic, Reugot, Ticolcin
      Banned
      Click to expand
      Definition: Rheumatic treatment/anti-cancer
    • Conorphone
      Trade names are not currently listed on this site.
      Banned
      Click to expand
      Definition: Opiod analgesic
    • Coroxon
      Trade names are not currently listed on this site.
      Banned
      Click to expand
      Definition: Anticoagulant
    • Cortisone
      Cortelan, Cortisone, Cortisyl, Cortogen, Cortone
      Conditionally Permitted
      Click to expand
      Definition: Corticosteroid
      Information:
      Cortisone is used in the treatment of a number of different diseases such as severe allergies and skin problems, asthma and arthritis. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

      Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

      Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

    • Cortivazol
      Altim, Diaster, Dilaster, Idaltim
      Banned
      Click to expand
      Definition: Corticosteroid
    • Cotinine
      Nicoret, Nicorette
      Banned
      Click to expand
      Definition: Nicotine metabolite
    • Coumarin
      Coumarin, Coumarinum, Esberiven Application, Lodema, Lymphex, Lysedem, Venalot Mono, Venium
      Banned
      Click to expand
      Definition: Anticoagulant
    • Cromoglycate
      PMS-Sodium Cromoglycate
      Conditionally Permitted
      Click to expand
      Definition: Antihistamine
      Information:
      Cromoglycate may be used in the control of allergies. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

      Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

      Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

    • Cromolyn
      Alergocrom, Alerion, Colimune, Cromantal, Cromese, Cromoglicin, Cromosol, Cropoz, Dilospir, Fenistil Eye Drops, Flenid, Gastrofrenal, Lomusol, Opticrom, Vividrin
      Conditionally Permitted
      Click to expand
      Definition: Antihistamine
      Information:
      Cromoglycate may be used in the control of allergies. Note: With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

      Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

      Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

    • Cropropamide
      Respirot
      Banned
      Click to expand
      Definition: Stimulant
    • Crotehamide
      Trade names are not currently listed on this site.
      Banned
      Click to expand
      Definition: Stimulant
    • Cyamemazine
      Cianatil, Tercian
      Banned
      Click to expand
      Definition: Antipsychotic
    • Cyclandelate
      Cyclospasmol
      Banned
      Click to expand
      Definition: Vasodilator
    • Cyclizine
      Echnatol, Merazine, Valoid
      Banned
      Click to expand
      Definition: Antihistamine
    • Cyclobarbital
      Fanodormo Calcico, Phanodorm, Somnupan C
      Banned
      Click to expand
      Definition: Sedative
    • Cyclobenzaprine
      Apo-Cyclobenzaprine, Flexeril, Fexmid
      Banned
      Click to expand
      Definition: Muscle relaxant
    • Cyclofenil (Cyclophenil)
      Fertodur, Menopax, Neoclym
      Banned
      Click to expand
      Definition: Anti-oestrogenic
    • Cycloguanil
      Trade names are not currently listed on this site.
      Banned
      Click to expand
      Definition: Antimalarial
    • Cyclomethycaine
      Surfacaine
      Banned
      Click to expand
      Definition: Local anaesthetic
    • Cyclopentamine
      Cyclonarol, Cyklosan, Sinos
      Banned
      Click to expand
      Definition: Psychoactive
    • Cyclopentolate
      Ak-Pentolate, Ciclolux, Colircusi Cicloplejico, Cyclogyl, Cyclopentol, Cyclopentolate, Mydrilate, Skiacol, Zykolat
      Banned
      Click to expand
      Definition: Antimuscarinic
    • Cyclophenil (Cyclofenil)
      Fertodur, Menopax, Neoclym
      Banned
      Click to expand
      Definition: Anti-oestrogenic
    • Cyclothiazide
      Anhydron, Renazide
      Banned
      Click to expand
      Definition: Diuretic
    • Cycrimine
      Cicrimina, Cycriminum, Pagitane
      Banned
      Click to expand
      Definition: Anticholinergic
    • Cyproheptadine
      Apenorm, Cyproheptadine, Cyprono, Cyprosian, Nuran, Periactinol, Periatin, Peritol, Supersan
      Conditionally Permitted
      Click to expand
      Definition: Antihistamine
      Information:
      Cyproheptadine may be used in the control of allergies and in the treatment of headaches and Cushing's disease. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

      Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

      Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

    • Danazol
      Azol, Cyclomen, Danatrol, Danocrine, Danokrin, Danol, Vabon, Winobanin
      Banned
      Click to expand
      Definition: Anabolic
    • Dantrolene
      Danlene, Dantamacrin, Dantralen, Dantrium, Dantrolen
      Conditionally Permitted
      Click to expand
      Definition: Muscle relaxant
      Information:
      Dantrolene may be used in the treatment of muscle stiffness or spasms. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

      Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

      Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

    • Dapsone
      Acedapsone, Avlosulfon, Daps, Dubronax, Servidapsone, Sulfona
      Banned
      Click to expand
      Definition: Antileprotic
    • Decamethonium
      Decacuran,Lopac-D-1260, Syncurine
      Banned
      Click to expand
      Definition: Muscle relaxant
    • Dehydrochloromethyltestosterone
      Durabolin, Turinabol
      Banned
      Click to expand
      Definition: Anabolic
    • Dehydrochlorotestosterone
      Trade names are not currently listed on this site.
      Banned
      Click to expand
      Definition: Anabolic
    • Delmadinone acetate
      Delmate, Estrex, Tardak, Tardastren, Tardastrex, Vetadinon, and Zenadrex
      Banned
      Click to expand
      Definition: Hormone
    • Delorazepam
      Trade names are not currently listed on this site.
      Banned
      Click to expand
      Definition: Anxiolytic
    • Dembrexine
      Dembrexina, Dembrexin, Sputolysin
      Conditionally Permitted
      Click to expand
      Definition: Mucolytic
      Information:
      Demxbrexine may be used in the treatment of respiratory disease. The detection time is estimated with 120 hours (5 days) after oral administration. A detection time is not the same as a withdrawal time. The detection time is the approximate period of time for which a substance (or its metabolite) remains in a horse's system such that it can be detected by the laboratory. The withdrawal time for a substance adds a safety margin, chosen with professional judgment and discretion to allow for individual differences between horses such as size, metabolism, degree of fitness, recent illness or disease etc.. You are advised to seek suitable advice from your treating veterinarian. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

      Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

      Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

    • Demecolcine
      Colcemid, Omain, Omaine, Reichstein's F, Santavy's Substance F, Substance F
      Banned
      Click to expand
      Definition: Rheumatic treatment/anti-cancer
    • Demoxepam
      Trade names are not currently listed on this site.
      Banned
      Click to expand
      Definition: Anxiolytic
    • Deoxycorticosterone
      Cortexon, Corticosterone, Cortiron, Cortitron, Cortisteron, Descotone, Dorcostrin, Percorten V (acetate), Percorten pivalate, Syncortyl
      Banned
      Click to expand
      Definition: Corticosteroid
    • Deptropine
      Brontin, Brontina, Brontine
      Banned
      Click to expand
      Definition: Antihistamine with anticholinergic activity
    • Deracoxib
      Deramaxx
      Conditionally Permitted
      Click to expand
      Definition: Non-steroidal anti-inflammatory
      Information:
      Deracoxib may be used to relieve pain and inflammation With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

      Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

      Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

    • Dermorphin
      Trade names are not currently listed on this site.
      Banned
      Click to expand
      Definition: Peptide opiod receptor agonist
    • Deserpidine
      Aescin, Canescin, Canescine, Deresperine, Deserpine, Harmonyl, Raunorine, Raunormin, Raunormine, Recanescin, Recanescine, Reserpidine, Tranquinil
      Banned
      Click to expand
      Definition: Antipsychotic
    • Desipramine
      Deprexan, Desipramine, Norpramine, Nortimil, Pertofran, Pertofrane, Sertofren
      Banned
      Click to expand
      Definition: Antidepressant
    • Desmethylpyrilamine
      Conditionally Permitted
      Click to expand

      Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

      Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

    • Desonide
      Apolar, DesOwen, Sine Fluor, Tridesilon Ointment
      Banned
      Click to expand
      Definition: Corticosteroid
    • Desoximethasone (Desoxymethasone)
      Actiderm, Flubason, Ibaril, Stiedex, Topicorete, Topicort, Topicorte, Topiderm
      Banned
      Click to expand
      Definition: Corticosteroid
    • Desoxyephedrine
      Desoxyn
      Banned
      Click to expand
      Definition: Stimulant
    • Desoxymethasone (Desoximethasone)
      Actiderm, Flubason, Ibaril, Stiedex, Topicorete, Topicort, Topicorte, Topiderm
      Banned
      Click to expand
      Definition: Corticosteroid
    • Desoxymethyltestosterone
      Trade names are not currently listed on this site.
      Banned
      Click to expand
      Definition: Anabolic
    • Desoxyvinyl-testosterone
      Banned
      Click to expand
      Definition: Anabolic
    • Detomidine
      Domosedan, Dormosedan
      Banned
      Click to expand
      Definition: Sedative
    • Dexamethasone
      Azium, Decaspray, Dectancyl, Deronil, Dexaltin, Dexamethasone, Dexject SP, Hostadex, Millicortene, Taprodex, Tuttozem N, Visumetazone, Wymesone
      Permitted
      Click to expand
      Definition: Corticosteroid
      Information:
      Dexamethasone is used to treat many inflammatory and auto-immune conditions. The maximum permitted plasma concentration of dexamethasone is 0.003 micrograms per milliliter.
    • Dextromethorphan
      Broncho-grippol-DM, Bal-Minil DM, Benylin DM, Robitussin
      Banned
      Click to expand
      Definition: Antitussive
    • Dextromoramide
      Jetrium, Narcolo, Palfium
      Banned
      Click to expand
      Definition: Narcotic
    • Dextropropoxyphene
      Abalgin, Algafan, Darvon, Depronal, Develin, Doloxene, Liberen, Novo-Propoxyn,
      Banned
      Click to expand
      Definition: Opiate analgesic
    • Dextrorphan
      Trade names are not currently listed on this site.
      Banned
      Click to expand
      Definition: Antitussive
    • Dezocine
      Dalgan
      Banned
      Click to expand
      Definition: Opiate analgesic
    • Diacerein
      Artrodar, Artrolyt, Fisiodar, Verboril
      Banned
      Click to expand
      Definition: Antiarthritic
    • Diamorphine (Heroin)
      Diamorf, Diamorphine, Diaphin
      Banned
      Click to expand
      Definition: Narcotic
    • Diaveridine
      Trade names are not currently listed on this site.
      Banned
      Click to expand
      Definition: Folic acid antagonist
    • Diazepam
      Complutine, Dialar, Diaquel, Diazemuls, Diazepam, Dienpax, Dizac, Ducene, Duradiazepam, Hexalid, Lamar, Relanium, Saromet, Stesolid, Valium
      Banned
      Click to expand
      Definition: Sedative
    • Diazoxide
      Diazoxide, Eudemine, Hyperstat, Proglicem, Proglycem
      Banned
      Click to expand
      Definition: Muscle relaxant
    • Dibenzepin
      Ecatril, Neodalit, Noveryl, Victoril
      Banned
      Click to expand
      Definition: Psychoactive
    • Dibucaine
      Cincain, Cinchocaine, Nupercainal, Somulose
      Banned
      Click to expand
      Definition: Local anaesthetic
    • Dichlorisone
      Dermaren, Dicloderm, Diclasone
      Banned
      Click to expand
      Definition: Corticosteroid
    • Dichloroacetate
      Ditrei, Oxypangam, Sklerocedin N, Lactanase Injection
      Conditionally Permitted
      Click to expand
      Definition: Organic acid
      Information:
      Dichloroacetate may be used to reduce blood lactate. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

      Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

      Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

    • Dichlorphenamide
      Antidrasi, Daranide, Dasanide, Fenamide, Glaucol, Glauconide, Glaumid, Oralcon, Oratrol, Tensodilen
      Banned
      Click to expand
      Definition: Carbonic anhydrase inhibitor
    • Diclofenac
      Algenac, Dichronic, Diclofenac, Diclo-Phlogont, Dolofenac, Doltarac, Neriodin, Reumadil, Surpass, Tsudohmin, Voltaren
      Permitted
      Click to expand
      Definition: Non-steroidal anti-inflammatory
      Information:
      Diclofenac may be used to relieve pain and inflammation The maximum permitted plasma concentration of diclofenac is 0.010 micrograms per milliliter.
    • Dicumarol
      Acadyl, Acavyl, Anathrombase, Antitrombosin, Apekumarol, Baracoumin, Cuma, Cumid, Dicoumal, Dicuman, Dicumaol R, Dicumarol, Dicumol, Dufalone, Kumoran, Melitoxin, Temparin, Trombosan
      Banned
      Click to expand
      Definition: Anticoagulant
    • Diethylpropion
      Delgamer, Diethylpropion, Menutil, Prefamone, Regenon, Tenuate Dospan
      Banned
      Click to expand
      Definition: Anorexic
    • Diethylthiambutene
      Trade names are not currently listed on this site.
      Banned
      Click to expand
      Definition: Opiate analgesic
    • Diethyltryptamine
      Trade names are not currently listed on this site.
      Banned
      Click to expand
      Definition: Psychedelic
    • Diflorasone acetate
      ApexiCon, Florone E, Flutone, Psorcon E, Vincosona
      Banned
      Click to expand
      Definition: Corticosteroid
    • Diflucortolone
      Claral, Dermaval, Neriforte, Nerisona, Nerisone, Temetex
      Banned
      Click to expand
      Definition: Corticosteroid
    • Diflunisal
      Adomal, Artrodol, Diflonid, Difludol, Diflunil, Dolisal, Dolobid, Dolobis, Donobid, Dorbid, Fluniget, Fluodonil, Flustar, Ilacen, Noaldol, Reuflos, Unisal
      Banned
      Click to expand
      Definition: Analgesic
    • Digitoxin
      Asthenthilo, Coramedan, Crystodigin, Digicor, Digilong, Digimed, Digimerck, Digipural, Digitaline, Digitasid, Digitrin, Ditaven, Mono-Glycocard, Tardigal
      Banned
      Click to expand
      Definition: Anti-arrhythmic
    • Digoxin
      Cardigox, Cardiogoxin, Cardioreg, Coragoxine, Digacin, Digivern, Digomal, Digitek, Eudigox, Lanacordin, Lanachrist, Lanicor, Lanorale, Lanoxin, Lanoxicaps, Lanoxcine, Natigoxin, Novodigal, Prodigox
      Banned
      Click to expand
      Definition: Anti-arrhythmic
    • Dihydrocodeine
      DHC Continus, Paracodine, Remedacen, Rikodeine, Tiamon
      Banned
      Click to expand
      Definition: Opiod analgesic
    • Dihydrocodeinone
      Hydrococet, Symtan, Anexsia, Dicodid, Hycodan, Hydromet, Hycomine, Hycet, Lorcet, Lortab, Norco, Novahistex, Hydrovo, Duodin, Kolikodol, Orthoxycol, Mercodinone, Synkonin, Norgan, Hydrokon, Vicodin
      Banned
      Click to expand
      Definition: Opiod analgesic
    • Dihydroergotamine
      Adhaegon, Dergiflux, Dergolyoc, Dergotamine, Detemes, DHE, Dihydergot, Dihydroergotamine, Diidergot, Ergovasan, Orstanorm, Tonopres
      Banned
      Click to expand
      Definition: Ergot alkaloid
    • Dihydromorphine
      Paramorphan
      Banned
      Click to expand
      Definition: Opiod analgesic
    • Diisopropylamine
      B-15, Cubisol, Dedyl, Diedi, Kalodil, Neovascoril, Nutricor, Oxypangam, Vasculene, Pangamic acid,Top B15+3,DADA 250, Tridenosen, Heptenal
      Banned
      Click to expand
      Definition: Vasodilator
    • Diltiazem
      Acalix, Altiazem, Angizem, Britiazim, Calcicard, Cardizem, Diladel, Diltiazem, Hart, Herbesser, Incoril, Masdil, Presoquin, Tilazem, Tildiem, Zilden
      Conditionally Permitted
      Click to expand
      Definition: Anti-arrythmic
      Information:
      Diltiazem may be used in the treatment of heart rhythm abnormalities. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

      Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

      Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

    • Dimefline
      Reanimil, Remeflin
      Banned
      Click to expand
      Definition: Respiratory stimulant
    • Dimethindene
      Fengel, Fenistil, Fenostil, Trimedil N
      Banned
      Click to expand
      Definition: Antipruritic
    • Dimethisoquin
      Haneal, Isochinol, Pruralgan, Pruralgin, Quotane
      Banned
      Click to expand
      Definition: Local anaesthetic
    • Dimethyl Sulphoxide (DMSO)
      Decap, Deltan, Demasorb, Demavet, Demeso, Demsodrox, Dermasorb, Dimexide, Dolicur, Doligur, Domoso, Dromisol, Durasorb, Gamasol 90, Hyadur, Infiltrina, Kemsol, Rimso 50, Sclerosol, Somipront, Syntexan, Topsyn
      Conditionally Permitted
      Click to expand
      Definition: Solvent
      Information:
      Dimethyl Sulphoxide (DMSO) may be used in the treatment of inflammation. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

      Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

      Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

    • Dimethylamphetamine
      Trade names are not currently listed on this site.
      Banned
      Click to expand
      Definition: Stimulant
    • Dimethyltryptamine
      Trade names are not currently listed on this site.
      Banned
      Click to expand
      Definition: Psychedelic
    • Diphenadione
      Contrax-D, Didandin, Didion, Dipaxin, Diphac, Diphacin, Diphacins, Gold Crest, Kill-Ko Rat Killer, Oragulant, Parakakes, Promar, Promar PCQ, Ramik, Ratindan,Ratindan 1, Rodent Cake, Solvan
      Banned
      Click to expand
      Definition: Anticoagulant
    • Diphenhydramine
      Benadryl Original, Benetussin, Broncleer, Cotussin, Dastusin, Delixir, Histodor Expectorant, Lupihist, Med-Tussin, Relief-Coff
      Conditionally Permitted
      Click to expand
      Definition: Antihistamine
      Information:
      Diphenhydramine may be used in the control of allergies. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

      Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

      Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

    • Diphenoxylate
      Diarsed, Diphenoxylate, Lofenoxal, Lomotil, Lonox
      Banned
      Click to expand
      Definition: Opiod agonist
    • Diphenylpyraline
      Arbid N, Hispril, Histalert, Histryl, Lergoban, Lyssipoll
      Banned
      Click to expand
      Definition: Antihistamine
    • Dipipanone
      Diconal, Fenpidon, Pipadone, Wellconal
      Banned
      Click to expand
      Definition: Opiod analgesic
    • Diprenorphine
      M5050, Revivon
      Banned
      Click to expand
      Definition: Opiod analgesic
    • Diprophylline
      Alergical Expect, Philinal, Ozothine
      Banned
      Click to expand
      Definition: Bronchodilator
    • Dipyridamole
      Anginal, Cleridium, Coribon, Coronarine, Corosan, Coroxin, Dipyridamole, Dipyridan, Maxicardil, Miosen, Natyl, Novodil, Peridamol, Persantin, Procardin, Trompersantin
      Banned
      Click to expand
      Definition: Antiplatelet
    • Dipyrone (Metamizole)
      Adolkin, Alginodia, Dolemicin, Lasain, Metilon, Metamizole, Minalgin, Neo-Melubrine, Nolotil, Novalgin, Novaminsulfon, Novemina, Optalgin, Vetalgin, Zimeta
      Conditionally Permitted
      Click to expand
      Definition: Non-steroidal anti-inflammatory
      Information:
      Dipyrone (metamizole) may be used to relieve pain and spasms. The detection time is estimated with 72 hours (3 days) after intravenous administration. A detection time is not the same as a withdrawal time. The detection time is the approximate period of time for which a substance (or its metabolite) remains in a horse's system such that it can be detected by the laboratory. The withdrawal time for a substance adds a safety margin, chosen with professional judgment and discretion to allow for individual differences between horses such as size, metabolism, degree of fitness, recent illness or disease etc.. You are advised to seek suitable advice from your treating veterinarian. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

      Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

      Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

    • Disopyramide
      Dicorynan, Dirythmin, Diso-Duriles, Durbis, Norpace, Rythmodan, Rythmodul
      Banned
      Click to expand
      Definition: Anti-arrhythmic
    • Disulfiram
      Abstensil, Abstinyl, Antabus, Antietil, Antivitium, Averzan, Esperal, Etiltox, Refusal
      Banned
      Click to expand
      Definition: Aldehyde dehydrohenase inhibitor
    • Dixyrazine
      Esucos
      Banned
      Click to expand
      Definition: Antipsychotic
    • DMAA
      Iron Tiger, Forthane, Geranamine, Floradrene
      Banned
      Click to expand
      Definition: Sympathomimetic
    • DMSO (Dimethyl Sulphoxide)
      Decap, Deltan, Demasorb, Demavet, Demeso, Demsodrox, Dermasorb, Dimexide, Dolicur, Doligur, Domoso, Dromisol, Durasorb, Gamasol 90, Hyadur, Infiltrina, Kemsol, Rimso 50, Sclerosol, Somipront, Syntexan, Topsyn
      Permitted
      Click to expand
      Definition: Solvent
      Information:
      DMSO (Dimethyl Sulphoxide) may be used in the treatment of inflammation.
    • Dobutamine
      Dobucard, Dobuject, Dobutamine, Dobutrex, Posiject
      Conditionally Permitted
      Click to expand
      Definition: Sympathomimetic
      Information:
      Dobutamine is used in the treatment of hypotension. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

      Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

      Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

    • Donepezil
      Alzaimax, Aricept, Aricept ODT, Donepezil, Eranz, Memorit
      Banned
      Click to expand
      Definition: Cholinesterase inhibitor
    • Dopamine
      Cordodopa, Dopamine, Dynatra, Giludop, Hettytropin, Inotropin, Inovan, Intropin, Revimine, Revivan
      Conditionally Permitted
      Click to expand
      Definition: Stimulant
      Information:
      Dopamine may be used in the treatment of hypotension during anaesthesia. Dopamine is a Threshold Substance. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

      Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

      Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

    • Dopexamine
      Dopacard
      Banned
      Click to expand
      Definition: Beta 2 adrenergic receptor agonist
    • Dorzolamide
      Dorzolamide, Dorzox, Glaucotensil, Timsopt, Trusopt
      Conditionally Permitted
      Click to expand
      Definition: Carbonic anhydrase inhibitor
      Information:
      Dorzolamide may be used in the treatment of opthalmic disease. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

      Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

      Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

    • Dothiepin
      Dopress, Dothep, Prothiaden, Thaden
      Banned
      Click to expand
      Definition: Antidepressant
    • Doxacurium
      Nuromax
      Banned
      Click to expand
      Definition: Muscle relaxant
    • Doxapram
      Docatone, Dopram, Doxapram, Doxapril, Stimulexin
      Banned
      Click to expand
      Definition: Stimulant
    • Doxepin
      Adapin, Aponal, Doxepin, Quitaxon, Sinequan, Sinquan, Sinquane, Triadapin
      Banned
      Click to expand
      Definition: Antidepressant
    • Doxylamine
      Alsadorm, Decapryn, Gittalun, Hoggar N, Mereprine, Sanalepsi N, Sedaplus, Somnil, Unisom-2
      Conditionally Permitted
      Click to expand
      Definition: Antihistamine
      Information:
      Doxylamine may be used in the control of allergies. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

      Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

      Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

    • Drofenine
      Cibalen, Espasmo Cibalena, Lunadon, Sonotryl, Spasmoplus, Spasmo-Cibalgin, Trasentine A
      Banned
      Click to expand
      Definition: Antispasmodic
    • Dromostanolone
      Drolban, Masterid, Masteril, Masteron, Permastril
      Banned
      Click to expand
      Definition: Anabolic
    • Droperidol
      Dehidrobenzperidol, Dridol, Droleptan, Inapsine, Sintosian
      Banned
      Click to expand
      Definition: Antipsychotic
    • Drospirenone
      Jasminelle, Yasmin, Yaz, Yira, Yirala
      Banned
      Click to expand
      Definition: Diuretic
    • Drostanolone
      Masterid, Masteril, Masteron, Masterone, Permastril
      Banned
      Click to expand
      Definition: Anabolic
    • Drotaverine
      No-Spa, Drotin DS, Doverin, Trospa
      Conditionally Permitted
      Click to expand
      Definition: Anti-spasmodic
      Information:
      Drotaverine may be used to relieve pain and spasms. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

      Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

      Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

    • Duloxetine
      Cymbalta, Duxetin, Xeristar, Yentreve
      Banned
      Click to expand
      Definition: Antidepressant
    • Dyclonine
      Dyclone, Dyclothane, Tanaclone
      Banned
      Click to expand
      Definition: Oral anaesthetic
    • Dyphylline
      Dilor, Glyfyllin, Neothylline, Neutrafillina, Neutraphyllin, Propyphyllin, Silbephyllin, Teofen
      Banned
      Click to expand
      Definition: Muscle relaxant
    • Ecgonine Methyl Ester
      Trade names are not currently listed on this site.
      Banned
      Click to expand
      Definition: Cocaine metabolite
    • Edrophonium
      Anticude, Enlon, Reversol, Tensilon
      Banned
      Click to expand
      Definition: Angiotensin-converting enzyme inhibitor
    • Efaproxiral
      Efaproxyn
      Banned
      Click to expand
      Definition: Haemoglobin modifier
    • Eletriptan
      Relert, Relpax
      Banned
      Click to expand
      Definition: Migraine relief
    • Eltenac
      Telzenac
      Conditionally Permitted
      Click to expand
      Definition: Non-steroidal anti-inflammatory
      Information:
      Eltenac may be used to relieve pain and control fever. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

      Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

      Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

    • Embramine
      Bromadryl, Mebryl, Medrin
      Banned
      Click to expand
      Definition: Antihistamine
    • Embutramide
      T-61 Euthanasia Solution
      Banned
      Click to expand
      Definition: Sedative
    • Emepronium
      Cetiprin, Cetiprin Novum, Detrulisin, Hexanium, Uro-Ripirin
      Banned
      Click to expand
      Definition: Antispasmodic
    • Emidonol
      Banned
      Click to expand
      Definition: Anti-ischaemic
    • Enalapril (Enalaprilat)
      Bonuten, Enalapril Richet, Gadopril, Kinfil, Vasotek I.V.
      Banned
      Click to expand
      Definition: Angiotensin-converting enzyme inhibitor
    • Enalaprilat (Enalapril)
      Bonuten, Enalapril Richet, Gadopril, Kinfil, Vasotek I.V.
      Banned
      Click to expand
      Definition: Angiotensin-converting enzyme inhibitor
    • Enciprazine
      Trade names are not currently listed on this site.
      Banned
      Click to expand
      Definition: Anxiolytic
    • Endorphins
      Trade names are not currently listed on this site.
      Banned
      Click to expand
      Definition: Endogenous opiods
    • Enkephalins
      Trade names are not currently listed on this site.
      Banned
      Click to expand
      Definition: Endogenous pain relief
    • Ephedrine
      Ectasule Minus, Efetonina, Ephedral, Ephetonin, Fedrine, Minims Ephedrine Hydrochloride, Rhino-Vaccin, Rino Pumilene, Roter, Spaneph, Stopasthme
      Banned
      Click to expand
      Definition: Stimulant (High level)
    • Epi-dihydrotestosterone
      Banned
      Click to expand
      Definition: Anabolic
    • Epibatidine
      Trade names are not currently listed on this site.
      Banned
      Click to expand
      Definition: Analgesic
    • Epiternbolone
      Trade names are not currently listed on this site.
      Banned
      Click to expand
      Definition: Anabolic
    • Epitestosterone
      Banned
      Click to expand
      Definition: Anabolic
    • Eplerenone
      Inspra
      Banned
      Click to expand
      Definition: Diuretic
    • Ergonovine
      Basergin, Ergonovine, Ergotrate, Metrergina, Mitrotan
      Banned
      Click to expand
      Definition: Vasoconstrictor
    • Ergotamine
      Ergomar, Ergostat, Medihaler-Ergotamine, Wigrettes
      Banned
      Click to expand
      Definition: Plant alkaloid
    • Ertugliflozin
      Steglatro
      Conditionally Permitted
      Click to expand
      Definition: Anti-hyperglycaemic
      Information:
      Ertugliflozin may be used in the treatment of equine metabolic syndrome. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

      Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

      Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

    • Erythrityl tetranitrate
      Trade names are not currently listed on this site.
      Banned
      Click to expand
      Definition: Blood vessel relaxant
    • Erythropoietin (EPO)
      Aranesp, Dynepo, Epocrin, Epogen, Erypo, Exetin-A, Pronivel
      Banned
      Click to expand
      Definition: Erythropoiesis
    • Esmolol
      Brevibloc, Esmolol, Miniblock
      Banned
      Click to expand
      Definition: Beta blocker
    • Estazolam
      Domnamid, Esilgan, Estazolam, Eurodin, Nuctalon
      Banned
      Click to expand
      Definition: Anxiolytic
    • Estranediol
      Trade names are not currently listed on this site.
      Banned
      Click to expand
      Definition: Anabolic
    • Estrone
      Cristallovar, Femogen, Kolpon, Oestrilin
      Conditionally Permitted
      Click to expand
      Definition: Hormone
      Information:
      Estrone is an ostrogen hormone that may also be used in the control of exercise induced pulmonary haemorrhage. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

      Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

      Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

    • Etafedrine
      Nethaprin
      Banned
      Click to expand
      Definition: Adrenergic
    • Etamiphylline
      Boifilina, Corafil, Dechophyline, Iodafilina, Longtussin, Solufilina, Ultratussin
      Banned
      Click to expand
      Definition: Bronchodilator
    • Etamivan
      Clairvan, Corivanil, Romecor, Vandid
      Banned
      Click to expand
      Definition: Stimulant
    • Etanercept
      Enbrel
      Banned
      Click to expand
      Definition: Tumor necrosis factor inhibition
    • Ethacrynic acid
      Crinuryl, Edecril, Edecrin, Edecrina, Hidromedin, Mingit, Otacril, Reomax, Taladren, Uregit
      Banned
      Click to expand
      Definition: Diuretic
    • Ethamivan
      Clairvan, Corivanil, Romecor, Vandid
      Banned
      Click to expand
      Definition: Respiratory stimulant
    • Ethamsylate
      Aglumin, Altodor, Antihaemorragico Fortuny, Dicinone, Dicynene, Dicynone, Eselin,Haemo 141, Impedil
      Banned
      Click to expand
      Definition: Haemostatic
    • Ethanol
      Conditionally Permitted
      Click to expand
      Definition: Organic compound
      Information:
      Ethanol may be used in the treatment of orthopaedic disease and as a sedative. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

      Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

      Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

    • Ethaverine
      Cebral, Ethaquin, Ethatab, Ethavex, Isovex, Laverin, Pasmol
      Banned
      Click to expand
      Definition: Vasodilator
    • Ethchlorvynol
      Alvinol, Placidil, Placidyl, Serenesil, Serenesil
      Banned
      Click to expand
      Definition: Sedative
    • Ethiazide
      Trade names are not currently listed on this site.
      Banned
      Click to expand
      Definition: Diuretic
    • Ethinamate
      Valamin, Valamina, Valaminetta, Valaminettae, Valaminetten, Valmid, Valmidate
      Banned
      Click to expand
      Definition: Sedative
    • Ethinylestradiol
      Estigyn, Estinyl, Ethinyloestradiol, Feminone, Femodette, Microgynon ED, Primogyn
      Banned
      Click to expand
      Definition: Oestrogen
    • Ethoheptazine
      Panalgin, Zactane
      Banned
      Click to expand
      Definition: Opiod analgesic
    • Ethopropazine
      Lysivane, Parkin, Parsotil, Tomil
      Banned
      Click to expand
      Definition: Antimuscarinic
    • Ethosuximide
      Emeside, Ethosuximide, Ethymal, Petinimid, Petnidan, Pyknolepsinum, Simatin, Suxinutin, Thetamid, Zarodan, Zarontin
      Banned
      Click to expand
      Definition: Anti-epileptic
    • Ethotoin
      Accenon, Peganone, Pegoanone
      Banned
      Click to expand
      Definition: Anticonvulsant
    • Ethoxzolamide
      Cardrase, Diuretic C, Ethamide, Redupresin
      Banned
      Click to expand
      Definition: Carbonic anhydrase inhibitor
    • Ethyl Aminobenzoate (Benzocaine)
      Americaine, Anaesthesin, Anbesol, Baby Anbesol, Bensokain, Capacol, Gengivarium, Hurricaine, Spec-T, Teething Syrup, Topicaine
      Conditionally Permitted
      Click to expand
      Definition: Local anaesthetic
      Information:
      Ethyl aminobenzoate is used for the temporary local relief of pain. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

      Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

      Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

    • Ethyl Loflazepate
      Victan
      Banned
      Click to expand
      Definition: Anxiolytic
    • Ethylamphetamine
      Apetinil, Apetinil-Depo, Adiparthrol
      Banned
      Click to expand
      Definition: Stimulant
    • Ethylestrenol
      Orabolin, Nandoral
      Banned
      Click to expand
      Definition: Anabolic
    • Ethylisobutrazine
      Ethylisobutrazine Hydrochloride Tablets
      Banned
      Click to expand
      Definition: Sedative
    • Ethylmorphine
      Cocillana, Codethyline, Dionina
      Banned
      Click to expand
      Definition: Opiod analgesic
    • Ethylnorepinephrine
      Trade names are not currently listed on this site.
      Banned
      Click to expand
      Definition: Bronchodilator
    • Etidocaine
      Duranest, Etidocaine Hydrochloride
      Banned
      Click to expand
      Definition: Local anaesthetic
    • Etifoxine
      Stresam
      Banned
      Click to expand
      Definition: Anxiolytic
    • Etilefrine
      Circupon, Effontil, Effortil, Eti-Puren, Tonus-Forte-Tablinen
      Banned
      Click to expand
      Definition: Stimulant
    • Etiocholanolone
      Banned
      Click to expand
      Definition: Anabolic
    • Etizolam
      Depas, Pasaden, Sedekopan
      Banned
      Click to expand
      Definition: Anxiolytic
    • Etodolac
      Edolan, Etodolac, Lodine, Ultradol, Zedolac
      Banned
      Click to expand
      Definition: Non-steroidal anti-inflammatory drug
    • Etodroxizine
      Indunox, Isonox
      Banned
      Click to expand
      Definition: Stimulant
    • Etomidate
      Amidate, Hypnomidate, Sibul
      Banned
      Click to expand
      Definition: Sedative
    • Etoricoxib
      Algix, Arcoxia, Nucoxia, Tauxib
      Banned
      Click to expand
      Definition: Non-steroidal anti-inflammatory drug
    • Etorphine
      Immobilon,M99
      Banned
      Click to expand
      Definition: Opiod analgesic
    • Exemestane
      Aromasil, Aromasin, Aromasine, Exemestance, Exemestane, Nikidess
      Banned
      Click to expand
      Definition: Aromatase inhibitor
    • Famprofazone
      Gewodin
      Banned
      Click to expand
      Definition: Stimulant
    • Febaramate
      Trade names are not currently listed on this site.
      Banned
      Click to expand
      Definition: Muscle relaxant
    • Felbamate
      Felbamyl, Felbatol, Taloxa
      Banned
      Click to expand
      Definition: Anticonvulsant
    • Felbinac
      Dolinac, Dolonac, Dolo Target, Flexfree, Ledergel, Napagel, Napageln, Selspot, Seltouch, Target, Traxam, Zenol Exum
      Conditionally Permitted
      Click to expand
      Definition: Non-steroidal anti-inflammatory
      Information:
      Felbinac may be used to relieve pain and inflammation. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

      Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

      Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

    • Felodipine
      Agon, Feloday, Felodur, Felogard, Flodil, Hydac, Modip, Munobal, Penedil, Perfudal, Plandil, Plendil, Preslow, Prevex, Renedil, Splendil
      Banned
      Click to expand
      Definition: Antihypertensive
    • Fenbufen
      Bufemid, Cincopal, Cinopal, Lederfen
      Banned
      Click to expand
      Definition: Non-steroidal anti-inflammatory drug
    • Fenbutrazate
      Filon
      Banned
      Click to expand
      Definition: Stimulant
    • Fencamfamine
      Euvitol, Glucoenergan, Reactivan
      Banned
      Click to expand
      Definition: Stimulant
    • Fencamine
      Trade names are not currently listed on this site.
      Banned
      Click to expand
      Definition: Stimulant
    • Fenclofenac
      Trade names are not currently listed on this site.
      Banned
      Click to expand
      Definition: Non-steroidal anti-inflammatory drug
    • Fenclozic acid
      Trade names are not currently listed on this site.
      Banned
      Click to expand
      Definition: Non-steroidal anti-inflammatory drug
    • Fenethylline (Fenetylline, Phenethylline, Phenetylline)
      Biocapton, Captagon, Fitton
      Banned
      Click to expand
      Definition: Stimulant
    • Fenetylline (Fenethylline, Phenethylline, Phenetylline)
      Biocapton, Captagon, Fitton
      Banned
      Click to expand
      Definition: Stimulant
    • Fenfluramine
      Acino, Adipomin, Dima-Fen, Obedrex, Ponderal, Ponderax, Pondimin, Ponflural, Rotondin
      Banned
      Click to expand
      Definition: Stimulant
    • Fenoldopam
      Corlopam, Fenoldopam
      Banned
      Click to expand
      Definition: Vasodilator
    • Fenoprofen
      Expron, Fenoprofen, Fepron, Nalfon, Nalgesic, Progesic
      Banned
      Click to expand
      Definition: Non-steroidal anti-inflammatory drug
    • Fenoterol
      Berotec, Fenotrol, Fensol, Partusisten
      Conditionally Permitted
      Click to expand
      Definition: Bronchodilator
      Information:
      Fenoterol may be used in the treatment of respiratory diseases. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

      Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

      Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

    • Fenozolone
      Ordinator
      Banned
      Click to expand
      Definition: Psychoactive
    • Fenpiprane
      Trade names are not currently listed on this site.
      Banned
      Click to expand
      Definition: Gastrointestinal disorders
    • Fenproporex
      Antiobes Retard, Appetitzügler, Dicel, Falagan, Gacilin, Grasmin, Lineal, Perphoxene, Solvolip, Tegisec
      Banned
      Click to expand
      Definition: Stimulant
    • Fenspiride
      Decaspir, Espiran, Eurespal, Fenspin, Fenspir, Fluiden, Pneumorel, Respiride, Viarespan
      Banned
      Click to expand
      Definition: Non-steroidal anti-inflammatory drug
    • Fentanyl
      Actiq, Duragesic, Fentanest, Fentatil, Fentanyl, Pentanyl, Sentonil, Sublimaze
      Banned
      Click to expand
      Definition: Opioid
    • Fentiazac
      Domureuma, Donorest, Fentac, Flogene, Norvedan, Riscalon
      Banned
      Click to expand
      Definition: Pain relief
    • Feprazone
      Analud, Brotazona, Cocresol, Danfenona, Grisona, Impriemial, Methrazone, Naloven, Nessazona, Nilatin, Prenakes, Prenazon, Rangozona, Represil, Tabrien, Zepelin
      Banned
      Click to expand
      Definition: Non-steroidal anti-inflammatory drug
    • Fexofenadine
      Allegra, Fexofenadine, Fexotabs, Kalicet, Telfast BD
      Conditionally Permitted
      Click to expand
      Definition: Antihistamine
      Information:
      Fexofenadine may be used in the control of allergies. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

      Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

      Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

    • Firocoxib
      Equioxx, Previcox
      Permitted
      Click to expand
      Definition: Non-steroidal anti-inflammatory
      Information:
      Firocoxib may be used to relieve pain and inflammation. The maximum permitted plasma concentration is 0.057 mg/lb (57 mg/1,000 lbs)
    • Flavoxate
      Genurin, Spasuret, Urispadol, Urispas
      Banned
      Click to expand
      Definition: Antispasmodic
    • Flecainide
      Almarytm, Flecaine, Flecainide, Tambocor
      Banned
      Click to expand
      Definition: Anti-arrhythmic
    • Floctafenine
      Apo-Floctafenine, Diralgan, Idalon, Idarac, Novodolan
      Banned
      Click to expand
      Definition: Non-steroidal anti-inflammatory drug
    • Fluandrenolide (Fluandrenolone, Fludroxycortide)
      Alondra-F, Cordran tape, Drenison, Haelan tape, Sermaka
      Banned
      Click to expand
      Definition: Corticosteroid
    • Fluandrenolone (Fluandrenolide, Fludroxycortide)
      Alondra-F, Cordran tape, Drenison, Haelan tape, Sermaka
      Banned
      Click to expand
      Definition: Corticosteroid
    • Fluanisone
      Anti-Pica, Metorin, Sedalande
      Banned
      Click to expand
      Definition: Sedative
    • Fludiazepam
      Erispan
      Banned
      Click to expand
      Definition: Anxiolytic
    • Fludrocortisone (Fluorocortisone)
      Alflorone, Astonin, F-Col, F-Cortef, Florinef, Fludrone, Fluohydrisone, Fludrocortisone
      Banned
      Click to expand
      Definition: Corticosteroid
    • Fludroxycortide (Fluandrenolide, Fluandrenolone)
      Alondra-F, Cordran tape, Drenison, Haelan tape, Sermaka
      Banned
      Click to expand
      Definition: Corticosteroid
    • Flufenamic acid
      Ansatin, Arlef, Meralen, Parlef, Sastridex, Surika
      Banned
      Click to expand
      Definition: Non-steroidal anti-inflammatory drug
    • Flumetasone (Flumethasone)
      Locacorten, Locorten, Locortene
      Conditionally Permitted
      Click to expand
      Definition: Corticosteroid
      Information:
      Flumetasone is used for the treatment of various skin disorders. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

      Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

      Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

    • Flumethasone (Flumetasone)
      Locacorten, Locorten, Locortene
      Conditionally Permitted
      Click to expand
      Definition: Corticosteroid
      Information:
      Flumethasone is used for the treatment of various skin disorders. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

      Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

      Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

    • Flumethazide
      Trade names are not currently listed on this site.
      Banned
      Click to expand
      Definition: Diuretic
    • Flunarizine
      Flerudin, Flunagen, Flurpax, Fluxarten, Gradient, Issium, Sibelium, Vasculene
      Banned
      Click to expand
      Definition: Antihypertensive
    • Flunisolide
      AeroBid, Bronalide, Bronilide, Gibiflu, Locasyn, Lokilan, Nasalide, Rhinalar, Syntaris
      Banned
      Click to expand
      Definition: Corticosteroid
    • Flunitrazepam
      Darkene, Flunipam, Noriel, Primum, Rohypnol, Roipnol, Valsera
      Banned
      Click to expand
      Definition: Anxiolytic
    • Flunixin Meglumine
      Banamine, Citation, Cronyxin, Finadyne, Flumevet LA, Flunazine, Flunixin, Influx-50, Meflosyl, Suppressor, Supressor
      Permitted
      Click to expand
      Definition: Non-steroidal anti-inflammatory
      Information:
      Flunixin may be used to relieve pain, inflammation and control fever. The maximum permitted plasma concentration of flunixin is 1.0 micrograms per milliliter.
    • Fluocinolone
      Trade names are not currently listed on this site.
      Banned
      Click to expand
      Definition: Corticosteroid
    • Fluocinolone acetonide
      Adermina, Boniderma, Capex, Cervicum, Cinotec, Cortalar, Cortilona, Dermalar, Dermofil, Elasven, Fluciderm, Flucort, Fluocinolone, Gelidina, Isnaderm, Localyn, Neoflu, Percutina, Sinalar, Synamol, Topifluor
      Banned
      Click to expand
      Definition: Corticosteroid
    • Fluocinonide
      Bestasone, Cusigel,Flu-21, Fluocinonide, Klariderm, Lidemol, Lidex, Lyderm, Metosyn, Novoter, Topsym, Topsymin, Topsyne
      Banned
      Click to expand
      Definition: Corticosteroid
    • Fluocortolone
      Syracort, Ultracur, Ultradil, Ultralan, Ultralanum, Ultralanum Plain
      Banned
      Click to expand
      Definition: Corticosteroid
    • Fluopromazine (Triflupromazine)
      Psyquil, Siquil, Vesprin
      Banned
      Click to expand
      Definition: Antipsychotic
    • Fluoresone
      Caducid
      Banned
      Click to expand
      Definition: Anti-epileptic
    • Fluorocortisone (Fludrocortisone)
      Trade names are not currently listed on this site.
      Banned
      Click to expand
      Definition: Corticosteroid
    • Fluorometholone
      Cortilet, Cortisdin, Delmeson, Efflumidex, Fluaton, Flucon, Flumetholon, Flumetol semplice, FML, FML Liquifilm, Isopto-Flucon, Lerna, Oxylone, Ursnon
      Banned
      Click to expand
      Definition: Corticosteroid
    • Fluorophenethylamine
      Trade names are not currently listed on this site.
      Banned
      Click to expand
      Definition: Stimulant
    • Fluoroprednisolone
      Trade names are not currently listed on this site.
      Banned
      Click to expand
      Definition: Corticosteroid
    • Fluoxetine
      Adofen, Animex-On, Deprex, Eufor, Fluctin, Fluoxetine, Fluval, Fontex, Foxetin, Portal, Prozac, Pulvules, Reneuron, Sarafem
      Banned
      Click to expand
      Definition: Antidepressant
    • Fluoxymesterone
      Trade names are not currently listed on this site.
      Banned
      Click to expand
      Definition: Anabolic
    • Flupenthixol
      Depixol, Emergil, Fluanxol
      Banned
      Click to expand
      Definition: Antidepressant
    • Fluphenazine
      Anatensol, Dapotum D, Modecate, Moditen, Omca, Pacinol, Permitil, Prolixin, Sevinol, Siqualone
      Banned
      Click to expand
      Definition: Antipsychotic
    • Flupirtine
      Flupirtine, Katadolon, Metanor, Trancopal Dolo
      Banned
      Click to expand
      Definition: Analgesic
    • Fluprednisolone (Flouroprednisolone)
      Alphadrol, Etadrol, Isopredon, Selectren, Vladicort
      Banned
      Click to expand
      Definition: Corticosteroid
    • Flurazepam
      Dalmadorm, Dalmane, Flurazepam, Fordrim, Midorm AR, Novo-Flupam, Paxane, Somnol, Som-Pam, Staurodorm, Valdorm
      Banned
      Click to expand
      Definition: Anxiolytic
    • Flurbiprofen
      Ansaid, Cebutid, Flugalin, Flurofen, Froben, Tulip
      Banned
      Click to expand
      Definition: Non-steroidal anti-inflammatory drug
    • Fluspirilene
      Fluspi, Imap, Imap Forte, Kivat, Redeptin
      Banned
      Click to expand
      Definition: Antipsychotic
    • Fluticasone
      Cutivate, Flixonase, Flixotide, Flonase, Flovent, Flovent Diskus, Fluticasone, Flutivate
      Conditionally Permitted
      Click to expand
      Definition: Corticosteroid
      Information:
      Fluticasone is used in the treatment of asthma, and as a topical anti-inflammatory agent. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

      Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

      Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

    • Flutoprazepam
      Flutoprazepam Tablets
      Banned
      Click to expand
      Definition: Anxiolytic
    • Fluvoxamine
      Faverin, Fevarin, Floxyfral, Fluvoxamina, Fluvoxamine, Luvox, Myroxine, Voxam
      Banned
      Click to expand
      Definition: Antidepressant
    • Formebolone
      Esiclene, Hubernol
      Banned
      Click to expand
      Definition: Anabolic
    • Formestane
      Lentare, Lentaron
      Banned
      Click to expand
      Definition: Aromatase inhibitor
    • Formoterol
      Atock, Foradil, Oxeze Turbuhaler, Oxis Turbohaler
      Conditionally Permitted
      Click to expand
      Definition: Bronchodilator
      Information:
      Formoterol may be used in the treatment of respiratory diseases. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

      Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

      Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

    • Fosinopril
      Fosinil, Fosinopril, Monopril, Secorvas, Staril, Vasopril
      Banned
      Click to expand
      Definition: Antihypertensive
    • Fosphenytoin
      Cerebyx, Cereneu, Fosphenytoin, Prodilantin, Pro-Epanutin
      Banned
      Click to expand
      Definition: Anticonvulsant
    • Fulvestrant
      Faslodex
      Banned
      Click to expand
      Definition: Anti-oestrogenic
    • Furazabol
      Miotolan, Miotolon
      Banned
      Click to expand
      Definition: Anabolic
    • Furazadrol
      Banned
      Click to expand
      Definition: Anabolic
    • Furfenorex
      Frugalan
      Banned
      Click to expand
      Definition: Stimulant
    • Furosemide
      Diural, Diurolasa, Frusid, Furosemide, Impugan, Lasix, Novosemide, Salix, Sigasalur, Urex
      Permitted
      Click to expand
      Definition: Diuretic
      Information:
      Furosemide may be used in the control of exercise-induced pulmonary hemorrhage, hypotension and edema. The maximum permitted plasma concentration of furosemide is 10 nanograms per milliliter.
    • Gabapentin
      Aclonium, Gabapentin, Neurontin, Normatol, Novo-Gabapentin
      Banned
      Click to expand
      Definition: Anticonvulsant
    • Galantamine
      Galantamine, Jilkon, Lycoremin, Nivalin, Reminyl
      Banned
      Click to expand
      Definition: Alzheimer medication - alkaloid
    • Gallamine
      Flaxedil
      Banned
      Click to expand
      Definition: Muscle relaxant
    • Gamma amino butyric acid (GABA)
      Carolina Gold
      Banned
      Click to expand
      Definition: Inhibitory neurotransmitter
    • Gamma-Butyrolactone (GBL)
      Prodrug of Gamma-butyrolactone (GHB)
      Banned
      Click to expand
      Definition: Sedative
    • Gamma-Hydroxybutyrate (GHB)
      Banned
      Click to expand
      Definition: Sedative
    • Gepirone
      Ariza, Variza
      Banned
      Click to expand
      Definition: Anxiolytic
    • Gestrinone
      Dimetriose, Dimetrose, Nemestran
      Banned
      Click to expand
      Definition: Anabolic
    • Glutethimide
      Doriden
      Banned
      Click to expand
      Definition: Sedative
    • Glycopyrrolate
      Asecryl, Glycopyrrolate, Nodapton, Robinul, Tarodyl, Tarodyn
      Banned
      Click to expand
      Definition: Anticholinergic
    • Grapiprant
      Galliprant
      Conditionally Permitted
      Click to expand
      Definition: Non-steroidal anti-inflammatory
      Information:
      Grapiprant may be used to relieve pain and inflammation. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

      Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

      Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

    • Growth Factors
      Chemicon
      Banned
      Click to expand
      Definition: Growth promotion
    • Growth Hormone (GH) - or analogues
      EquiGen
      Banned
      Click to expand
      Definition: Growth Promotion
    • Guaifenesin
      Actifed CC Chesty, Balminil Expectorant, Benylin, Bronchol, Calcough Chesty, Duratuss G, Formulaexpec, Glyate, Larylin Lozenges, Myocaine, PV Tussin, Resyl, Robitussin, Sudafed Cough, Tedral Expectorant, Vicks Acta Plus Expectorant, Wick Formel 44 Husten-Loser
      Banned
      Click to expand
      Definition: Expectorant
    • Guanabenz
      Wytensin
      Banned
      Click to expand
      Definition: Sedative
    • Guanadrel
      Hylorel
      Banned
      Click to expand
      Definition: Antihypertensive
    • Guanethidine
      Dopom, Ismelin, Ismeline, Visutensil
      Banned
      Click to expand
      Definition: Antihypertensive
    • Guanoclor
      Vatensol
      Banned
      Click to expand
      Definition: Sympatholytic
    • Guanoxan
      Envacar
      Banned
      Click to expand
      Definition: Sympatholytic
    • GW1516
      Endurobol, Cardarine
      Banned
      Click to expand
      Definition: Metabolic Modulator
    • Haemaglobin analogues
      Hemopure, Oxyglobin
      Banned
      Click to expand
      Definition: Oxygen transport
    • Halcinonide
      Halog
      Banned
      Click to expand
      Definition: Corticosteroid
    • Halobetasol
      Ultravate
      Banned
      Click to expand
      Definition: Corticosteroid
    • Halodrol
      Banned
      Click to expand
      Definition: Anabolic
    • Haloperidol
      Aloperidin, Bioperidolo, Brotopon, Dozic, Duraperidol, Einalon S, Eukystol, Haldol, Halosten, Keselan, Linton, Peluces, Serenace, Serenase, Sigaperidol
      Banned
      Click to expand
      Definition: Neuroleptic
    • Harmaline
      Trade names are not currently listed on this site.
      Banned
      Click to expand
      Definition: Psychoactive
    • Harpagoside (Devils claw)
      Devil's Claw, NoBute, Devil's Relief, Nil-Bute
      Banned
      Click to expand
      Definition: Analgesic
    • Heptaminol
      Coreptil, Eoden, Heptaminol, Hept-A-Myl, Heptylon, Myolytril
      Banned
      Click to expand
      Definition: Stimulant
    • Heroin (Diamorphine)
      Diamorf, Diamorphine, Diaphin
      Banned
      Click to expand
      Definition: Narcotic
    • Hexafluorenium
      Mylaxen, Milaxen
      Banned
      Click to expand
      Definition: Muscle relaxant
    • Hexobarbital
      Barbidorm, Citopan, Cyclonal, Cyclopan, Enhexymal, Enhexymalum, Evipal, Hexanastab, Hexenal, Methexenyl, Narcosan, Narcosan Soluble, Noctivane, Novopan, Privenal, Sombucaps, Sombulex, Somnalert
      Banned
      Click to expand
      Definition: Sedative
    • Hexocyclium
      Tral, Traline
      Banned
      Click to expand
      Definition: Antimuscarinic
    • Hexylcaine
      Cyclaine
      Banned
      Click to expand
      Definition: Local anaesthetic
    • Histapyrrodine
      Domistan
      Banned
      Click to expand
      Definition: Antihistamine
    • Homatropine
      Isopto Homatropine, Hycodan, Tussigon
      Banned
      Click to expand
      Definition: Anticholinergic
    • Homophenazine
      Trade names are not currently listed on this site.
      Banned
      Click to expand
      Definition: Psychiatric drug
    • Hordenine
      Victan
      Conditionally Permitted
      Click to expand
      Definition: Stimulant
      Information:
      Hordenine can be found in a number of grassy plants, grains and some species of cactus. The substance may stiumulate the central nervous system.. Hordenine is a Specified Substance. Specified Substances should not in any way be considered less important or less dangerous than other Prohibited Substances. Rather, they are simply substances which are more likely to have been ingested by Horses for a purpose other than the enhancement of sport performance, for example, through a contaminated food substance. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

      Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

      Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

    • Huperzine A
      HupA, Selagine
      Banned
      Click to expand
      Definition: Acetylcholinesterase inhibitor
    • Hydralazine
      Apresolin, Furlazin, Nepresol, Pressalin
      Banned
      Click to expand
      Definition: Vasodilator; afterload reducer
    • Hydrochlorothiazide (Hydrochlorthiazide)
      Adelphan, Dichlotride, Diurex, Esidrex, Hydrochlorothiazide, Hydro-Diuril, HydroSaluric, Novo-Hydrazide, Thiuretic
      Conditionally Permitted
      Click to expand
      Definition: Diuretic
      Information:
      Hydrochlorothiazide (hydrochlorthiazide) may be used in the control of hypotension and oedema With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

      Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

      Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

    • Hydrochlorthiazide (Hydrochlorothiazide)
      Adelphan, Dichlotride, Diurex, Esidrex, Hydrochlorothiazide, Hydro-Diuril, HydroSaluric, Novo-Hydrazide, Thiuretic
      Conditionally Permitted
      Click to expand
      Definition: Diuretic
      Information:
      Hydrochlorthiazide (hydrochlorothiazide) may be used in the control of hypotension and oedema. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

      Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

      Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

    • Hydrocodone
      Hycodan, Anexsia, Duradyne, Hycodan, Hycomine, Codamine
      Banned
      Click to expand
      Definition: Opiod analgesic
    • Hydrocortisone
      Alfacort, Aquanil HC, Bactine, Barriere HC, Calmicort, Cortate, Dermacort, Egocort, Hycort, Hydrocortisone, Hydrosone, Mildison, Nutracort, Proctocort, Schericur, Synacort, Texacort
      Conditionally Permitted
      Click to expand
      Definition: Corticosteroid
      Information:
      Hydrocortisone is used for the treatment of severe allergic reactions and various endocrine and skin disorders. Hydrocortisone is a Threshold Substance. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

      Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

      Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

    • Hydroflumethiazide
      Saluron, Diucardin, Hydroflumethiazide
      Banned
      Click to expand
      Definition: Diuretic
    • Hydromorphinol
      Numorphan
      Banned
      Click to expand
      Definition: Opiod analgesic
    • Hydromorphone
      Palladone, Palladon, Dilaudid
      Banned
      Click to expand
      Definition: Opiod analgesic
    • Hydroxy-gamma amino butyric acid (Hydroxy-GABA)
      Banned
      Click to expand
      Definition: Inhibitory neurotransmitter
    • Hydroxyamphetamine
      Paredrine, Paremyd
      Banned
      Click to expand
      Definition: Stimulant
    • Hydroxyephedrine (Oxilofrine)
      Trade names are not currently listed on this site.
      Banned
      Click to expand
      Definition: Stimulant
    • Hydroxytestosterone
      Trade names are not currently listed on this site.
      Banned
      Click to expand
      Definition: Anabolic
    • Hydroxyzine
      Alamon, Atara, Ataraxoid, Atarazoid, Atarox, Deinait, Durrax, Equipose, Fasarax, Hychotine, Neo-Calma, Neurozina, Nevrolaks, Pamazone, Paxistil, Placidol, Plaxidol, Tran-Q, Tranquizine, Traquizine, Vesparaz, Vesparaz-Wirkstoff
      Conditionally Permitted
      Click to expand
      Definition: Antihistamine
      Information:
      Hydroxyzine may be used in the It is used for the control of itchiness related to allergies in horses. Its active metabolite is cetirizine, a Controlled Medication Substance. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

      Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

      Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

    • Hyoscine (Scopolamine)
      Transderm-scop, Scopoderm
      Banned
      Click to expand
      Definition: Anticholinergic
    • Hyoscyamine (Atropine isomer)
      Levsin, Buscopan
      Banned
      Click to expand
      Definition: Anticholinergic
    • Ibandronate
      Boniva, Bondronat, Bonviva, Idandrix, Adronil, Bondrova, Bonprove
      Banned
      Click to expand
      Definition: Bone metabolism agent
    • Ibogaine
      Trade names are not currently listed on this site.
      Banned
      Click to expand
      Definition: Psychoactive indole
    • Ibuprofen
      Actiprofen, Bifen, Brugesic, Burana, Dolgit, Faspic, Ibufen, Ibugel, Ibuleve, Ibumax, Ibumed, Ibuprofen, Ibusal, Ibumetin, Ibutop, Junifen, Nurofen, Perofen, Rupan, Solufen
      Conditionally Permitted
      Click to expand
      Definition: Non-steroidal anti-inflammatory
      Information:
      Ibuprofen may be used to relieve pain, inflammation and control fever. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

      Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

      Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

    • Ibutilide
      Corvert
      Banned
      Click to expand
      Definition: Anti-arrhythmic
    • Iloprost
      Ilomedine, Ventavis
      Banned
      Click to expand
      Definition: Vasodilator
    • Imipramine
      Tofranil
      Banned
      Click to expand
      Definition: Antidepressant
    • Indacaterol
      Sequadra, Onbrez Breezhaler, Ultibro Breezhaler, Enerair Breezhaler, Arcapta Neohaler
      Conditionally Permitted
      Click to expand
      Definition: Bronchodilator
      Information:
      Indacaterol may be used in the treatment of respiratory diseases. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

      Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

      Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

    • Indapamide
      Indapamide, Natrilix, Coversyl comp
      Banned
      Click to expand
      Definition: Diuretic
    • Indomethacin
      Confortid, Elmetacin, Imbrilon, Indocid, Indocin, Indocin-SR, Indochron E-R, Indometacin, Indomod
      Conditionally Permitted
      Click to expand
      Definition: Non-steroidal anti-inflammatory
      Information:
      Indomethacin may be used to relieve pain and inflammation. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

      Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

      Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

    • Indoprofen
      Flosin, Flosint, Isindone, Reumofen
      Banned
      Click to expand
      Definition: Non-steroidal anti-inflammatory drug
    • Indoramin
      Doralese, Baratol
      Banned
      Click to expand
      Definition: Antihypertensive
    • Infliximab
      Remicade
      Banned
      Click to expand
      Definition: Therapeutic antibody
    • Ipratropium
      Aerovent, Apo-Ipravent, Apovent, Atronase, Atrovent, Bitrop, Disne Asmol, Ipratropium, Kendral-Ipratropium, Narilet, Rhinotrop, Rhinovent, Rinatec, Rinoberen, Rinovagos, Vagos
      Permitted
      Click to expand
      Definition: Bronchodilator
      Information:
      Ipratropium may be used in the treatment of respiratory diseases.
    • Iprindole
      Galatur, Prondol, Tertran
      Banned
      Click to expand
      Definition: Antidepressant
    • Iproniazid
      Marsilid, Iprozid, Ipronid, Rivivol, Propilniazida
      Banned
      Click to expand
      Definition: Antidepressant
    • Ipsapirone
      Trade names are not currently listed on this site.
      Banned
      Click to expand
      Definition: Anxiolytic
    • Irbesartan
      Aprovel, Karvea, Avapro
      Banned
      Click to expand
      Definition: Antihypertensive
    • Isoaminile
      Peracon
      Banned
      Click to expand
      Definition: Antitussive
    • Isocarboxazid
      Marplan
      Banned
      Click to expand
      Definition: Antidepressant
    • Isoetharine
      Bronkosol
      Banned
      Click to expand
      Definition: Beta 2 adrenergic receptor agonist
    • Isoflupredone
      Predef, isofluprednisolone
      Conditionally Permitted
      Click to expand
      Definition: Corticosteroid
      Information:
      Isoflupredone may be used in the treatment of inflammatory skin diseases. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

      Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

      Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

    • Isomethadone
      Isomethadone I
      Banned
      Click to expand
      Definition: Analgesic
    • Isometheptane
      Isonyl, Midrin, Midrid, Octanil, Octon
      Banned
      Click to expand
      Definition: Stimulant
    • Isometheptene
      Midrin, Amidrine
      Banned
      Click to expand
      Definition: Sympathomimetic
    • Isoprenaline (Isoprotorenol)
      Isuprel
      Banned
      Click to expand
      Definition: Bronchodilator
    • Isopropamide
      Isamid, Marygin-M, Piaccamide, Priazimide, Sanulcin
      Banned
      Click to expand
      Definition: Anticholinergic
    • Isoproterenol (Isoprenaline)
      Isuprel
      Banned
      Click to expand
      Definition: Bronchodilator
    • Isopyrin (Ramifenazone)
      Delta-Tomanol, Tomanol
      Banned
      Click to expand
      Definition: Pain relief
    • Isosorbide dinitrate
      Isordil
      Banned
      Click to expand
      Definition: Vasodilator
    • Isothipendyl
      Apaisyl, Actapront, Istamyl, Sedermyl
      Banned
      Click to expand
      Definition: Antihistamine
    • Isoxicam
      Maxicam, Pacyl, Vectren
      Banned
      Click to expand
      Definition: Non-steroidal anti-inflammatory drug
    • Isoxsuprine Hydrochloride
      Duvadilan, Fenam, Vadosilan, Vasosuprina Ilfi, Xuprin
      Permitted
      Click to expand
      Definition: Vasodilator
      Information:
      Isoxsuprine may be used in the treatment of vascular diseases of the lower limb.
    • Isradipine
      Isradipine, Lomir
      Banned
      Click to expand
      Definition: Calcium channel blocker
    • Kebuzone
      Chebutan, Chepirol, Chetopir, Ketazon
      Banned
      Click to expand
      Definition: Non-steroidal anti-inflammatory drug
    • Ketamine
      Ketajet, Vetalar, Ketanest, Ketaset, Ketalar
      Conditionally Permitted
      Click to expand
      Definition: Anaesthetic
      Information:
      Ketamine is a general anaesthetic resulting in sedation, immobility, analgesia and amnesia. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

      Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

      Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

    • Ketazolam
      Anseren, Ansietil, Sedatival, Sedotime, Solatran, Unakalm
      Banned
      Click to expand
      Definition: Anxiolytic
    • Ketoprofen
      Alrheumat, Capisten, Fastum, Kenhancer, Ketoartril, Ketofen, Ketoprofene, Meprofen, Orudis, Profenid, Tafirol
      Permitted
      Click to expand
      Definition: Non-steroidal anti-inflammatory
      Information:
      Ketoprofen may be used to relieve pain, inflammation and control fever. The maximum permitted plasma concentration of ketoprofen is 0.250 micrograms per milliliter.
    • Ketorolac
      Acular, Ketorolac, Toradol, Tora-Dol
      Banned
      Click to expand
      Definition: Non-steroidal anti-inflammatory
    • Ketotifen
      Ketotifen oral, Zaditor, Alaway, Zyrtec Itchy Eye, Claritin Eye
      Banned
      Click to expand
      Definition: Antihistamine
    • Krypton
      Banned
      Click to expand
      Definition: Hypoxia Inducible Factor Activator
    • Labetalol
      Albetol, Labetalol, Trandate
      Banned
      Click to expand
      Definition: Beta blocker
    • Lamotrigine
      Lamictal, Lamotrigine
      Banned
      Click to expand
      Definition: Anticonvulsant
    • Lenperone
      Elanone-V
      Banned
      Click to expand
      Definition: Anxiolytic
    • Leptazole (Pentylenetetrazole)
      Banned
      Click to expand
      Definition: Stimulant
    • Letosteine
      Broluidal, Viscotiol, Letofort
      Banned
      Click to expand
      Definition: Mucolytic
    • Letrozole
      Femar, Femara, Letrolan
      Banned
      Click to expand
      Definition: Aromatase inhibitor
    • Levallorphan
      Lorfan
      Banned
      Click to expand
      Definition: Opiod antagonist
    • Levamisole
      Decaris, Ergamisol, Ketrax
      Conditionally Permitted
      Click to expand
      Definition: Anti-parasitic
      Information:
      Levamisole may be used in the treatment of parasitic diseases. A complete and timely submitted Medications Report Form submitted to NRHA required. Not permitted in the horse's system within 24 hours of competition.

      Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

      Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

    • Levobunolol
      Akbeta, Betagan, Levobunolol Hydrochloride
      Banned
      Click to expand
      Definition: Beta blocker
    • Levocabastine
      Livostin
      Conditionally Permitted
      Click to expand
      Definition: Antihistamine
      Information:
      Levocabastine may be used in the control of allergies. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

      Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

      Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

    • Levodopa
      Atamet, Levodopa, Madopar, Parcopa, Prolopa, Sinemet, Stalevo
      Banned
      Click to expand
      Definition: Di hydroxythenylalanine substitute
    • Levomethadone
      L-Polamidon, L-Polamidon C
      Conditionally Permitted
      Click to expand
      Definition: Opioid
      Information:
      Levomethadone (levomethadone hydrochloride) may be used to relieve pain. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

      Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

      Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

    • Levomethorphan
      Trade names are not currently listed on this site.
      Banned
      Click to expand
      Definition: Opiod analgesic
    • Levophacetoperane
      Trade names are not currently listed on this site.
      Banned
      Click to expand
      Definition: Boosts brain uptake of catecholamines
    • Levorphanol
      Levorphanol Tartrate, Levo-Dromoran
      Banned
      Click to expand
      Definition: Opiod analgesic
    • Levothyroxine
      L Thyroxin, T4, Eltroxin, Euthyrox, Letterbox, Levaxin, L-thyroxine, Thyrax, Levoxyl, Synthroid, Thyrax Duotab, Thyrox, Eutirox, Tirosint, Thyrin, Thyrolar
      Permitted
      Click to expand
      Definition: Hormone
      Information:
      Levothyroxine may be used in the treatment of hypothyroidism.
    • LGD-4033
      Banned
      Click to expand
      Definition: Anabolic
    • Lidocaine
      Anestacon, Dalcaine Lidocaine, Laryng-O-Jet, Leostesin, Lidocaine, Neo-Novutox, Rapidocaine, Xylocaine, Xylotox
      Conditionally Permitted
      Click to expand
      Definition: Local anaesthetic
      Information:
      Lidocaine is used for the temporary local relief of pain. The detection time is estimated with 48 hours (2 days) after subcutaneous administration. Please remember: A detection time is not the same as a withdrawal time. The detection time is the approximate period of time for which a substance (or its metabolite) remains in a horse's system such that it can be detected by the laboratory. The withdrawal time for a substance adds a safety margin, chosen with professional judgment and discretion to allow for individual differences between horses such as size, metabolism, degree of fitness, recent illness or disease etc. You are advised to seek suitable advice from your treating veterinarian. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

      Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

      Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

    • Lidoflazine
      Clinium, Corflazine, Klinium, Ordiflazine
      Banned
      Click to expand
      Definition: Anti-arrhythmic
    • Lisinopril
      Prinivil, Zestril
      Banned
      Click to expand
      Definition: Angiotensin-converting enzyme inhibitor
    • Lithium
      Eskalith, Lithane, Lithium carbonate, Lithium Citrate
      Banned
      Click to expand
      Definition: Mood stabiliser
    • Lobeline
      Desista, Habit-X, Lobatox, Lobidan, Nicoban, Refrane, Smokeless, Stopsmoke, Test Sixty, Unilobin
      Banned
      Click to expand
      Definition: Respiratory stimulant
    • Lofentanil
      Trade names are not currently listed on this site.
      Banned
      Click to expand
      Definition: Opiod analgesic
    • Lofepramine
      Gamanil, Tymelyt
      Banned
      Click to expand
      Definition: Antidepressant
    • Loperamide
      Lopex, Imodium, Dimor, Pepto Diarrhea Control
      Conditionally Permitted
      Click to expand
      Definition: Opioid agonist
      Information:
      Loperamide may be used in the treatment of digestive tract diseases such as diarrhoea. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

      Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

      Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

    • Loprazolam
      Dormonoct, Havlane, Somnovit
      Banned
      Click to expand
      Definition: Anxiolytic
    • Loratadine
      Claritine, Clarityn, Fristamin, Tidilor
      Conditionally Permitted
      Click to expand
      Definition: Antihistamine
      Information:
      Loratadine may be used in the control of allergies. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

      Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

      Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

    • Lorazepam
      Ativan
      Banned
      Click to expand
      Definition: Anxiolytic
    • Lormetazepam
      Noctamid, Ergocalm, Loramet, Dilamet, Sedaben
      Banned
      Click to expand
      Definition: Anxiolytic
    • Lornoxicam
      Xefocam
      Banned
      Click to expand
      Definition: Non-steroidal anti-inflammatory drug
    • Losartan
      Cozaar, Hyzaar
      Banned
      Click to expand
      Definition: Antihypertensive
    • Loxapine
      Loxapac, Loxitane
      Banned
      Click to expand
      Definition: Antipsychotic
    • Lucanthone
      Nilodin
      Banned
      Click to expand
      Definition: Radiation sensitizer
    • Lumiracoxib
      Prexige
      Banned
      Click to expand
      Definition: Non-steroidal anti-inflammatory drug
    • Mabuterol
      Broncholin
      Banned
      Click to expand
      Definition: Beta agonist
    • Madol
      Banned
      Click to expand
      Definition: Anabolic
    • Magnesium sulphate (injection)
      Magnesium sulphate, MgSO4
      Conditionally Permitted
      Click to expand
      Definition: Inorganic compound
      Information:
      Magnesium sulphate injections may be used in the control of pain and have a calming effect. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

      Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

      Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

    • Maprotiline
      Deprilept, Ludiomil, Psymion
      Banned
      Click to expand
      Definition: Antidepressant
    • Mazindol
      Mazanor, Sanorex
      Banned
      Click to expand
      Definition: Anorexic
    • MDA (Methylenedioxyamphetamine)
      Trade names are not currently listed on this site.
      Banned
      Click to expand
      Definition: Stimulant
    • MDEA (Methylenedioxyethylamphetamine)
      Trade names are not currently listed on this site.
      Banned
      Click to expand
      Definition: Stimulant
    • MDMA (Methylenedioxymethamphetamine)
      Trade names are not currently listed on this site.
      Banned
      Click to expand
      Definition: Stimulant
    • Mebanazine
      Trade names are not currently listed on this site.
      Banned
      Click to expand
      Definition: Mono-amine oxidase inhibitor
    • Mebeverine
      Colofac, Duspatal
      Banned
      Click to expand
      Definition: Antispasmodic
    • Mebhydroline
      Bexidal, Diazolin, Fabahistin
      Banned
      Click to expand
      Definition: Antihistamine
    • Mebutamate
      Dormate
      Banned
      Click to expand
      Definition: Sedative
    • Mecamylamine
      Mecamylamine Hydrochloride
      Banned
      Click to expand
      Definition: Nicotine antagonist
    • Meclizine
      Antivert, Bonine, Meclizine HCl
      Banned
      Click to expand
      Definition: Antihistamine
    • Meclofenamic Acid
      Lenidolor, Meclodol, Meclofenamate, Meclomen, Movens
      Conditionally Permitted
      Click to expand
      Definition: Non-steroidal anti-inflammatory
      Information:
      Meclofenamic acid may be used to relieve pain and inflammation. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

      Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

      Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

    • Meclofenoxate
      Lucidril
      Banned
      Click to expand
      Definition: Stimulant
    • Meconine
      Trade names are not currently listed on this site.
      Banned
      Click to expand
      Definition: Opiod
    • Medazepam
      Nobrium, Rudotel, Raporan, Ansilan
      Banned
      Click to expand
      Definition: Anxiolytic
    • Medetomidine
      Domitor
      Banned
      Click to expand
      Definition: Sedative
    • Medroxyprogesterone (Medroxyprogesterone Acetate)
      Depo-Provera, Dilena, Divina, Enaf, Farlutes, Premelle, Provera
      Banned
      Click to expand
      Definition: Progestin
    • Medroxyprogesterone Acetate (Medroxyprogesterone)
      Depo-Provera, Dilena, Divina, Enaf, Farlutes, Premelle, Provera
      Banned
      Click to expand
      Definition: Progestin
    • Medrylamine
      Postafen
      Banned
      Click to expand
      Definition: Antihistamine
    • Medrysone
      HMS
      Banned
      Click to expand
      Definition: Corticosteroid
    • Mefenamic acid
      Ponstel, Ponstan, Ponstal, Parkemed, Mafepain, Mephadolor, Meftal, Dyfenamic, Potarlon, Dolfenal
      Banned
      Click to expand
      Definition: Non-steroidal anti-inflammatory drug
    • Mefenorex
      Rondimen, Pondinil
      Banned
      Click to expand
      Definition: Stimulant
    • Mefexamide
      Méféxadyne, Perneuron, Timodyne
      Banned
      Click to expand
      Definition: Stimulant
    • Mefruside
      Baycaron
      Banned
      Click to expand
      Definition: Diuretic
    • Meldonium
      Mildronate
      Banned
      Click to expand
      Definition: Anti-ischaemic
    • Meloxicam
      CO Meloxicam, Dom-Meloxicam, Gen-Meloxicam, Meloxicam, Metacam, Mobic, Mobicox, Movalis, Movatec, Novo-Meloxicam, Parocin, Petcam, PHL-Meloxicam, PMS-Meloxicam, Tenaron
      Conditionally Permitted
      Click to expand
      Definition: Non-steroidal anti-inflammatory
      Information:
      Meloxicam may be used to relieve pain, inflammation and control fever. The detection time is estimated with 72 hours (3 days) after oral administration. A detection time is not the same as a withdrawal time. The detection time is the approximate period of time for which a substance (or its metabolite) remains in a horse's system such that it can be detected by the laboratory. The withdrawal time for a substance adds a safety margin, chosen with professional judgment and discretion to allow for individual differences between horses such as size, metabolism, degree of fitness, recent illness or disease etc.. You are advised to seek suitable advice from your treating veterinarian. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

      Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

      Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

    • Melperone
      Buronil, Burnil, Eunerpan
      Banned
      Click to expand
      Definition: Antipsychotic
    • Memantine
      Axura, Ebixa, Namenda
      Banned
      Click to expand
      Definition: N-methyl D-asparate receptor antagonist
    • Meparfynol
      Allotropal, Anti-Stress, Dormison, Oblivon
      Banned
      Click to expand
      Definition: Anxiolytic
    • Mepazine
      Trade names are not currently listed on this site.
      Banned
      Click to expand
      Definition: Antipsychotic
    • Mepenzolate
      Cantil
      Banned
      Click to expand
      Definition: Muscle relaxant
    • Meperidine (Pethidine)
      Mepergan, Demerol, Meperidine Hydrochloride
      Banned
      Click to expand
      Definition: Opiod analgesic
    • Mephenesin
      Decontractyl, Myanesin, Relaxar, Rhex
      Banned
      Click to expand
      Definition: Muscle relaxant
    • Mephentermine
      Wyamine sulfate
      Banned
      Click to expand
      Definition: Stimulant
    • Mephenytoin
      Mesantoin
      Banned
      Click to expand
      Definition: Anticonvulsant
    • Mephobarbital
      Mebaral
      Banned
      Click to expand
      Definition: Sedative
    • Mepindolol
      Betagon, Corindolan, Mepicor
      Banned
      Click to expand
      Definition: Beta blocker
    • Mepivacaine
      Carbocain, Carbocaine, Intra-Epicaine, Isocaine, Meaverin, Mepicaton, Mepivacaine, Mepivastesin, Polocaine, Scandicain, Scandicaine, Scandinibsa
      Conditionally Permitted
      Click to expand
      Definition: Local anaesthetic
      Information:
      Mepivacaine is used for the temporary local relief of pain. The detection time is estimated with 48 hours (2 days) after subcutaneous administration. Please remember: A detection time is not the same as a withdrawal time. The detection time is the approximate period of time for which a substance (or its metabolite) remains in a horse's system such that it can be detected by the laboratory. The withdrawal time for a substance adds a safety margin, chosen with professional judgment and discretion to allow for individual differences between horses such as size, metabolism, degree of fitness, recent illness or disease etc. You are advised to seek suitable advice from your treating veterinarian. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

      Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

      Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

    • Meprednisone
      Betapar, Cortipyren B, Deltisona B, Latisona B, Prednisonal
      Banned
      Click to expand
      Definition: Corticosteroid
    • Meprobamate (Meprobromate)
      Meprobamate
      Banned
      Click to expand
      Definition: Anxiolytic
    • Meprobromate (Meprobamate)
      Meprobamate
      Banned
      Click to expand
      Definition: Anxiolytic
    • Meprylcaine
      Trade names are not currently listed on this site.
      Banned
      Click to expand
      Definition: Local anaesthetic
    • Meptazinol
      Meptid
      Banned
      Click to expand
      Definition: Opioid analgesic
    • Mepyramine (Pyrilamine)
      Albatussin, Anthisan
      Banned
      Click to expand
      Definition: Antihistamine
    • Meralluride
      Mercuhydrin
      Banned
      Click to expand
      Definition: Diuretic
    • Merbaphen
      Trade names are not currently listed on this site.
      Banned
      Click to expand
      Definition: Diuretic
    • Mercaptomerin
      Trade names are not currently listed on this site.
      Banned
      Click to expand
      Definition: Diuretic
    • Mersalyl
      Diursal, Igrosin, Mercurital, Mercusal, Salyrgan, Uragan
      Banned
      Click to expand
      Definition: Diuretic
    • Mesalamine (Mesalazine)
      Asacol, Delzicol, Lialda, Mezavant, Octasa, Pentasa, Salofalk, Zintasa
      Conditionally Permitted
      Click to expand
      Definition: Non-steroidal anti-inflammatory
      Information:
      Mesalamine (Mesalazine) may be used to treat diseases of the digestive tract. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

      Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

      Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

    • Mesalazine (Mesalamine)
      Asacol, Delzicol, Lialda, Mezavant, Octasa, Pentasa, Salofalk, Zintasa
      Conditionally Permitted
      Click to expand
      Definition: Non-steroidal anti-inflammatory
      Information:
      Mesalamine (Mesalazine) may be used to treat diseases of the digestive tract. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

      Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

      Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

    • Mesocarb
      Sydnocarb
      Banned
      Click to expand
      Definition: Stimulant
    • Mesoridazine
      Serentil
      Banned
      Click to expand
      Definition: Neuroleptic
    • Mestanolone
      Trade names are not currently listed on this site.
      Banned
      Click to expand
      Definition: Anabolic
    • Mesterolone
      Proviron
      Banned
      Click to expand
      Definition: Anabolic
    • Metaclazepam
      Talis
      Banned
      Click to expand
      Definition: Anxiolytic
    • Metamizole (Dipyrone)
      Adolkin, Alginodia, Dolemicin, Lasain, Metilon, Minalgin, Neo-Melubrine, Nolotil, Novalgin, Novaminsulfon, Novemina, Optalgin, Vetalgin
      Conditionally Permitted
      Click to expand
      Definition: Non-steroidal anti-inflammatory
      Information:
      Metamizole (Dipyrone) may be used to relieve pain and spasms. The detection time is estimated with 72 hours (3 days) after intravenous administration. A detection time is not the same as a withdrawal time. The detection time is the approximate period of time for which a substance (or its metabolite) remains in a horse's system such that it can be detected by the laboratory. The withdrawal time for a substance adds a safety margin, chosen with professional judgment and discretion to allow for individual differences between horses such as size, metabolism, degree of fitness, recent illness or disease etc.. You are advised to seek suitable advice from your treating veterinarian. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

      Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

      Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

    • Metaproterenol
      Alotec, Alupent, Metaprel, Metaproterenol
      Banned
      Click to expand
      Definition: Bronchodilator
    • Metaraminol
      Aramine, Metaraminol Bitatrate
      Banned
      Click to expand
      Definition: Stimulant
    • Metaxalone
      Skelaxin
      Banned
      Click to expand
      Definition: Muscle relaxant
    • Metazocine
      Trade names are not currently listed on this site.
      Banned
      Click to expand
      Definition: Opiod analgesic
    • Metformin
      Glucophage XR, Carbophage SR, Riomet, Fortamet, Glumetza, Obimet, Gluformin, Dianben, Diabex, Diaformin, Siofor and Metfogamma.
      Conditionally Permitted
      Click to expand
      Definition: Anti-hyperglycaemic
      Information:
      Metformin may be used in the treatment of Equine Metabolic Syndrome. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

      Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

      Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

    • Methacholine
      Mecholyl, Methacholine, Provocholine, Provokit
      Banned
      Click to expand
      Definition: Hypotensive
    • Methadone
      Dolmed, L-Polamivet, Methadose, Westadone
      Banned
      Click to expand
      Definition: Opioid
    • Methallenestril
      Vallestril
      Banned
      Click to expand
      Definition: Oestrogen
    • Methamphetamine
      Desoxyn
      Banned
      Click to expand
      Definition: Stimulant
    • Methandienone
      Anabol, Dianabol, Melic
      Banned
      Click to expand
      Definition: Anabolic
    • Methandriol
      Sinesex, Stenediol, Troformone
      Banned
      Click to expand
      Definition: Anabolic
    • Methandrostenolone
      Dianabol, Danabol, Reforvit-b
      Banned
      Click to expand
      Definition: Anabolic
    • Methantheline
      Asabaine, Avagal, Banthin, Dixamone, Doladene, Frenogastrico,Gastrin-1 Human, Gastrin I, Gastrosedan, Metantyl, Metaxan, Methanide, Resobantin, Ulcine, Ulcudexter, Vagamin, Xanteline
      Banned
      Click to expand
      Definition: Antimuscarinic
    • Methapyrilene
      Paradormalene, Pyrathyn, Pyrinistab, Pyrinistol, Rest-On, Restryl, Semikon, Tenalin, Thionylan
      Banned
      Click to expand
      Definition: Antihistamine
    • Methaqualone
      Mandrax
      Banned
      Click to expand
      Definition: Sedative
    • Metharbital
      Trade names are not currently listed on this site.
      Banned
      Click to expand
      Definition: Sedative
    • Methasterone
      Methasteron, Superdrol, Methyldrostanolone
      Banned
      Click to expand
      Definition: Anabolic
    • Methazolamide
      Methazolamide
      Banned
      Click to expand
      Definition: Diuretic
    • Methcathinone
      Trade names are not currently listed on this site.
      Banned
      Click to expand
      Definition: Psychoactive
    • Methdilazine
      Bristaline, Dilosyn, Disyncram, Tacaryl, Tacazyl, Tacryl
      Banned
      Click to expand
      Definition: Antihistamine
    • Methenolone
      Primobolan
      Banned
      Click to expand
      Definition: Anabolic
    • Methimazole
      Tapazole, Felimazole
      Banned
      Click to expand
      Definition: Antihyperthyroidsim
    • Methixene
      Tremaril
      Banned
      Click to expand
      Definition: Antispasmodic
    • Methocarbamol
      Delaxin, Lumirelax, Methocarbamol, Miowas, Robaxin, Traumacut, Tresortil
      Permitted
      Click to expand
      Definition: Muscle relaxant
      Information:
      Methocarbamol may be used in the treatment of muscle spasms and pain. The maximum permissible plasma concentration of methocarbamol is 4.0 micrograms per milliliter.
    • Methohexital
      Brevital Sodium
      Banned
      Click to expand
      Definition: Sedative
    • Methotrexate
      Trexall, Rheumatrex
      Banned
      Click to expand
      Definition: Immunomodulator
    • Methotrimeprazine
      Nozinan
      Banned
      Click to expand
      Definition: Antipsychotic
    • Methoxamine
      Idasal, Vasoxine, Vasoxyl, Vasylox
      Banned
      Click to expand
      Definition: Vasoconstriction
    • Methoxyphenamine
      Asmi, Euspirol, Orthoxine, Ortodrinex, Proasma
      Banned
      Click to expand
      Definition: Non-steroidal anti-inflammatory drug
    • Methoxypromazine
      Trade names are not currently listed on this site.
      Conditionally Permitted
      Click to expand
      Definition: Sedative
      Information:
      Methoyxpromazine may be used for sedation. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

      Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

      Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

    • Methscopolamine (Methyl Scopolamine)
      Pamine
      Banned
      Click to expand
      Definition: Muscarinic antagonist
    • Methsuximide
      Celontin
      Banned
      Click to expand
      Definition: Anticonvulsant
    • Methyclothiazide
      Methyclothiazide, Enduron
      Banned
      Click to expand
      Definition: Diuretic
    • Methyl Scopolamine (Methscopolamine)
      Pamine
      Banned
      Click to expand
      Definition: Muscarinic antagonist
    • Methylaminorex
      Trade names are not currently listed on this site.
      Banned
      Click to expand
      Definition: Stimulant
    • Methylatropine
      Mintussin, Mydriasin, Tropin
      Banned
      Click to expand
      Definition: Anticholinergic
    • Methylchlorthiazide (Methylclothiazide)
      Banned
      Click to expand
      Definition: Diuretic
    • Methylclothiazide (Methylchlorthiazide)
      Trade names are not currently listed on this site.
      Banned
      Click to expand
      Definition: Diuretic
    • Methyldienolone
      Methyldien
      Banned
      Click to expand
      Definition: Anabolic
    • Methyldihydromorphinone
      Trade names are not currently listed on this site.
      Banned
      Click to expand
      Definition: Opiod analgesic
    • Methyldopa
      Aldomet, Aldoril, Dopamet
      Banned
      Click to expand
      Definition: Antihypertensive
    • Methylenedioxyamphetamine (MDA)
      Trade names are not currently listed on this site.
      Banned
      Click to expand
      Definition: Stimulant
    • Methylenedioxyethylamphetamine (MDEA)
      Trade names are not currently listed on this site.
      Banned
      Click to expand
      Definition: Stimulant
    • Methylenedioxymethamphetamine (MDMA)
      Trade names are not currently listed on this site.
      Banned
      Click to expand
      Definition: Stimulant
    • Methylephedrine
      Codaewon, Coughmin, Ilvico Syrup, Ilvico Liquid, Methorcon, Tussoretardin
      Banned
      Click to expand
      Definition: Stimulant
    • Methylergonovine
      Methergine
      Banned
      Click to expand
      Definition: Vasoconstriction
    • Methylhexanamine
      Iron Tiger, Forthane, Geranamine, DMAA, Floradrene
      Banned
      Click to expand
      Definition: Sympathomimetic
    • Methylhexaneamine
      Geranamine
      Banned
      Click to expand
      Definition: Stimulant
    • Methylmethcathinone
      Trade names are not currently listed on this site.
      Banned
      Click to expand
      Definition: Psychoactive
    • Methylnortestosterone
      Trade names are not currently listed on this site.
      Banned
      Click to expand
      Definition: Anabolic
    • Methylphenidate
      Ritalin
      Banned
      Click to expand
      Definition: Stimulant
    • Methylprednisolone (Methylprednisolone Acetate)
      Besonia, Depomedrol, Esametone, Lemod, Medesone, Medixon, Medlone, Medrol Dosepak, Medrone, Mesopren, Metastab, Methylprednisolone, Metrisone, Metrocort, Metysolon, Promacortine, Reactenol, Summicort
      Conditionally Permitted
      Click to expand
      Definition: Corticosteroid
      Information:
      Methylprednisolone is used in the treatment of arthritis and various respiratory diseases, as well as in the management of auto-immune diseases. The detection time is estimated with 672 hours (28 days) after intra-articular administration. Please remember: A detection time is not the same as a withdrawal time. The detection time is the approximate period of time for which a substance (or its metabolite) remains in a horse's system such that it can be detected by the laboratory. The withdrawal time for a substance adds a safety margin, chosen with professional judgment and discretion to allow for individual differences between horses such as size, metabolism, degree of fitness, recent illness or disease etc. You are advised to seek suitable advice from your treating veterinarian. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

      Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

      Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

    • Methylprednisolone Acetate (Methylprednisolone)
      Besonia, Depomedrol, Esametone, Lemod, Medesone, Medixon, Medlone, Medrol Dosepak, Medrone, Mesopren, Metastab, Methylprednisolone, Metrisone, Metrocort, Metysolon, Promacortine, Reactenol, Summicort
      Conditionally Permitted
      Click to expand
      Definition: Corticosteroid
      Information:
      Methylprednisolone acetate is used in the treatment of arthritis and various respiratory diseases, as well as in the management of auto-immune diseases. The detection time is estimated with 672 hours (28 days) after intra-articular administration. Please remember: A detection time is not the same as a withdrawal time. The detection time is the approximate period of time for which a substance (or its metabolite) remains in a horse's system such that it can be detected by the laboratory. The withdrawal time for a substance adds a safety margin, chosen with professional judgment and discretion to allow for individual differences between horses such as size, metabolism, degree of fitness, recent illness or disease etc. You are advised to seek suitable advice from your treating veterinarian. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

      Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

      Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

    • Methylprylon (Methyprylon)
      Dimerin, Methprylon, Noctan, Nodular
      Banned
      Click to expand
      Definition: Sedative
    • Methylpseudoephedrine
      Trade names are not currently listed on this site.
      Banned
      Click to expand
      Definition: Stimulant
    • Methylsalicylic acid
      Tubasal, Nemasol Sodium
      Conditionally Permitted
      Click to expand
      Definition: Non-steroidal anti-inflammatory
      Information:
      Methylsalicylic acid may be used to relieve pain. It metabolises into salicylic acid, a Controlled Medication. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

      Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

      Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

    • Methyltestosterone
      Android, Testred, Virilon
      Banned
      Click to expand
      Definition: Anabolic
    • Methyltrienolone
      Metribolone
      Banned
      Click to expand
      Definition: Anabolic
    • Methyprylon (Methylprylon)
      Dimerin, Methprylon, Noctan, Nodular
      Banned
      Click to expand
      Definition: Sedative
    • Methysergide
      Sansert, Deseril
      Banned
      Click to expand
      Definition: 5-hydroxytryptamine receptor antagonist
    • Meticrane
      Arresten, Fontiliz
      Banned
      Click to expand
      Definition: Diuretic
    • Metipranolol
      Optipranolol, Metipranolol
      Banned
      Click to expand
      Definition: Beta blocker
    • Metoclopramide
      Apo-Metoclop, Clopra, Clopromate, Elieten, Emperal, Enterosil, Gastrosil, Maxolon, Metoclopramide, Metopram, Paspertin, Primperan, Reglan, Viscal
      Conditionally Permitted
      Click to expand
      Definition: Dopamine antagonist
      Information:
      Metoclopramide may be used in the treatment of ileus. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

      Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

      Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

    • Metocurine
      Metocurine Iodide, Metubine, Mutubine Iodide
      Banned
      Click to expand
      Definition: Muscle relaxant
    • Metolazone
      Mykrox, Zaroxolyn
      Banned
      Click to expand
      Definition: Diuretic
    • Metomidate
      Aquacalm, Hypnodil, Methoxymol
      Banned
      Click to expand
      Definition: Hypnotic
    • Metoprolol
      Beloc, Beprolo, Betaloc, Lopresor, Lopressor, Metoprolol, Novo-Metoprol, Selokeen, Seloken
      Banned
      Click to expand
      Definition: Beta blocker
    • Metrenperone
      Trade names are not currently listed on this site.
      Banned
      Click to expand
      Definition: Antipyretic
    • Metyrapone
      Mepyrapone, Metapirone, Metapyron, Metapyrone, Methopirapone, Methopyrapone, Methopyrinine, Methopyrone, Metopiron, Metopirone, Metopyrone, Metroprione
      Banned
      Click to expand
      Definition: Hydrocortisone synthesis inhibitor
    • Mexazolam
      Melex, Sedoxil
      Banned
      Click to expand
      Definition: Anxiolytic
    • Mexiletine
      Alti-Mexiletine, Katen, Mexetil, Mexilen, Mexiletine, Mexitil, Mexitilen, Myovek, Novo-Mexiletine, Ritalmex, Tumetil
      Banned
      Click to expand
      Definition: Anti-arrhythmic
    • Mianserin
      Athimil, Athymil, Bolvidon, Lantanon, Lerivon, Mianserine, Norval, Tolvin, Tolvon
      Banned
      Click to expand
      Definition: Psychoactive
    • Mibefradil
      Mibefradil, Posicor
      Banned
      Click to expand
      Definition: Antihypertensive
    • Mibolerone
      Cheque drops, Mibolerone
      Banned
      Click to expand
      Definition: Anabolic
    • Midazolam
      Midazolam HCl, Hypnovel ampoules, Midazolam solution
      Conditionally Permitted
      Click to expand
      Definition: Sedative
      Information:
      Midazolam may be used to reduce anxiety, as a sedative and in an anaesthetic premedication. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

      Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

      Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

    • Midodrine
      Pro-Amiline, ProAmatine
      Banned
      Click to expand
      Definition: Vasopressor
    • Milrinone
      Primacor
      Banned
      Click to expand
      Definition: Phosphodiesterase 3 inhibitor
    • Minoxidil
      APO-Gain Topical solution, Loniten, Minoxidil, Rogaine tablets
      Banned
      Click to expand
      Definition: Vasodilator
    • Mirtazepine
      Avanza, Remeron, Zispin Soltab
      Banned
      Click to expand
      Definition: Antidepressant
    • Mivacurium
      Mivacron
      Banned
      Click to expand
      Definition: Muscle relaxant
    • Modafanil
      Cephalon tablets, Provigil
      Banned
      Click to expand
      Definition: Stimulant
    • Moexipril
      Cardiotensin, Femipres, Moex, Perdix, Primox
      Banned
      Click to expand
      Definition: Angiotensin-converting enzyme inhibitor
    • Mofebutazone
      Mofesal, Monozon, Reumatox
      Banned
      Click to expand
      Definition: Non-steroidal anti-inflammatory drug
    • Molidustat
      Banned
      Click to expand
      Definition: Hypoxia Inducible Factor Activator
    • Molindone
      Moban
      Banned
      Click to expand
      Definition: Antipsychotic
    • Mometasone
      Asmanex Twisthaler inhalation powder, Elocon cream, Elocon ointment, Nasonex nasal spray, PMS-Mometasone, Taro-mometasone
      Banned
      Click to expand
      Definition: Corticosteroid
    • Montelukast
      Brondilat, Montelast, Singulair, Singular
      Banned
      Click to expand
      Definition: Leucotriene receptor antagonist - asthma treatment
    • Moperone
      Luvatren
      Banned
      Click to expand
      Definition: Antipsychotic
    • Moprolol
      Levotensin, Omeral
      Banned
      Click to expand
      Definition: Beta blocker
    • Morphedrine
      Trade names are not currently listed on this site.
      Banned
      Click to expand
      Definition: Stimulant
    • Morpheridine
      Trade names are not currently listed on this site.
      Banned
      Click to expand
      Definition: Analgesic
    • Morphine
      Avinza, Duramorph, Kadian, Morphalgin, Morphine sulphate injection, MS-Contin, MST Continus, Oramorph, Roxanol, Sevredol
      Banned
      Click to expand
      Definition: Opioid
    • Mosapramine
      Trade names are not currently listed on this site.
      Banned
      Click to expand
      Definition: Antipsychotic
    • Moxaverine
      Certonal, Eupaverin, Eupaverine, Eupaverina, Kollateral
      Banned
      Click to expand
      Definition: Phosphodiesterase inhibition
    • Muscarine
      Trade names are not currently listed on this site.
      Banned
      Click to expand
      Definition: Parasympathomimetic
    • Myoinosital tripyrophosphate
      Banned
      Click to expand
      Definition: Pyrophosphate
    • N-butyl Scopolamine
      Buscopan
      Conditionally Permitted
      Click to expand
      Definition: Anticholinergic
      Information:
      N-butylscopolamine may be used in the treatment of abdominal spasms such as colic. The detection time is estimated with 24 hours (1 day) after intra-venous administration. Please remember: A detection time is not the same as a withdrawal time. The detection time is the approximate period of time for which a substance (or its metabolite) remains in a horse's system such that it can be detected by the laboratory. The withdrawal time for a substance adds a safety margin, chosen with professional judgment and discretion to allow for individual differences between horses such as size, metabolism, degree of fitness, recent illness or disease etc. You are advised to seek suitable advice from your treating veterinarian. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

      Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

      Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

    • Nabumetone
      Gen-Nabumetone, Relafen, Relifex tablets, Suspension
      Banned
      Click to expand
      Definition: Non-steroidal anti-inflammatory drug
    • Nadolol
      Corgard
      Banned
      Click to expand
      Definition: Beta blocker
    • Nadoxolol
      Bradyl
      Banned
      Click to expand
      Definition: Anti-arrhythmic
    • Naepaine
      Banned
      Click to expand
      Definition: Local anaesthetic
    • Naftidrofuryl
      Dusodril, Nafronyl, Praxilene
      Banned
      Click to expand
      Definition: Vasodilator
    • Nalbuphine
      Nubain
      Banned
      Click to expand
      Definition: Opiod analgesic
    • Nalmefene
      Selincro
      Banned
      Click to expand
      Definition: Opioid antagonist
    • Nalorphine
      Nalline
      Banned
      Click to expand
      Definition: Opiod receptor agonist and antagonist
    • Naloxone
      Naloxone HCl, Narcanti, Nexodal, Suboxone
      Conditionally Permitted
      Click to expand
      Definition: Opioid antagonist
      Information:
      Naloxone may be used to reverse the effects of opioid medication. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

      Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

      Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

    • Naltrexone
      Naltrexon Vitaflo, Revia, Relistol, Vivitrol
      Banned
      Click to expand
      Definition: Opiod receptor antagonist
    • Nandrolone (Nortestosterone)
      Deca-Durabolin, Durabolin, Laurabolin, Nandrolin
      Banned
      Click to expand
      Definition: Anabolic
    • Naphazoline
      Clearine, Coldan, Murine Eye Drops, Naphcon, Naphcon Forte, Privine, Rhino-Mex-N, Transpulmina Rino, Vasocon
      Banned
      Click to expand
      Definition: Sympathomimetic
    • Naproxen
      Apranax, Flanax, Floxalin, Madaprox, Naixan, Napren, Naprogesic, Naprosyn, Novo-Naprox, Synflex, Xenar
      Conditionally Permitted
      Click to expand
      Definition: Non-steroidal anti-inflammatory
      Information:
      Naproxen may be used to relieve pain, inflammation and control fever. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

      Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

      Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

    • Naratriptan
      Amerge, Naramig
      Banned
      Click to expand
      Definition: 5-hydroxytryptamine agonist (migraine treatment)
    • Nebivolol
      Bystolic, Nebilet, Hypoloc, Nebivolol
      Banned
      Click to expand
      Definition: Beta blocker
    • Nedocromil
      Alocril, Tilade
      Banned
      Click to expand
      Definition: Mast cell stabiliser
    • Nefazodone
      Serzone, Nefadar
      Banned
      Click to expand
      Definition: Psychoactive
    • Nefopam
      Acupan
      Banned
      Click to expand
      Definition: Non opiod analgesic
    • Neostigmine
      Neostigmin, Glycostigmin
      Conditionally Permitted
      Click to expand
      Definition: Parasympathomimetic
      Information:
      Neostigmine may be used in the treatment of gastrointestinal tract diseases. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

      Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

      Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

    • Neridronate
      Banned
      Click to expand
      Definition: Bone metabolism agent
    • Nialamide
      Niamid, Espril
      Banned
      Click to expand
      Definition: Antidepressant
    • Nicardipine
      Cardene
      Banned
      Click to expand
      Definition: Antihypertensive
    • Nicotine
      Nicorette, Habitrol, Nicorol, Nicotinell
      Banned
      Click to expand
      Definition: Stimulant
    • Nicoumalone
      Sintrom, Sinthrome
      Banned
      Click to expand
      Definition: Anticoagulant
    • Nifedipine
      Adalat, Nical, Nifedipin, Procardia
      Banned
      Click to expand
      Definition: Anti-angina
    • Nifenalol
      Impeasel, Inpea
      Banned
      Click to expand
      Definition: Beta blocker
    • Niflumic acid
      Nifluril
      Banned
      Click to expand
      Definition: Non-steroidal anti-inflammatory drug
    • Nikethamide
      Cardiamine, Cora, Coramina, Coramine, Corazone, Cormed, Kardonyl, Percoral
      Banned
      Click to expand
      Definition: Stimulant
    • Nimesulide
      Nimovet, Nimed, Sulidene
      Banned
      Click to expand
      Definition: Non-steroidal anti-inflammatory drug
    • Nimetazepam
      Erimin
      Banned
      Click to expand
      Definition: Anxiolytic
    • Nimodipine
      Nimodipine, Nimotop
      Banned
      Click to expand
      Definition: Antihypertensive
    • Nitrazepam
      Insomin, Dormalon, Nitravet, Mogadon
      Banned
      Click to expand
      Definition: Anxiolytic
    • Nitroglycerin
      Nitroglycerin, Nitromist, Nitrostat, Minitran
      Banned
      Click to expand
      Definition: Vasodilator
    • Nomifensine
      Alival, Nomival
      Banned
      Click to expand
      Definition: Dopamine re-uptake inhibitor
    • Nonivamide
      ABC Hydrogel-Warmepflaster, ABC Warme-Pflaster Sensitive, Gothaplast Capsicum-Warmepflaster, Hansaplast ABC Warme-Pflaster Sensitive
      Banned
      Click to expand
      Definition: Topical analgesic/irritant
    • Norandrostenediol
      Banned
      Click to expand
      Definition: Anabolic
    • Norandrostenedione
      19-N-Andro, Bolandione, Proven Pure 19-Norandrostenedione
      Banned
      Click to expand
      Definition: Anabolic
    • Norbolethone
      Genabol
      Banned
      Click to expand
      Definition: Anabolic
    • Norclostebol
      Anabol 4-19
      Banned
      Click to expand
      Definition: Anabolic
    • Norcocaine
      Banned
      Click to expand
      Definition: Cocaine metabolite
    • Nordiazepam
      Stilny, Vegesan, Calmday
      Banned
      Click to expand
      Definition: Tranquiliser
    • Norepinephrine (noradrenaline)
      Conditionally Permitted
      Click to expand
      Definition: Hormone
      Information:
      Norepinephrine (noradrenaline) may be used in the treatment of anaphylaxis and hypotension. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

      Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

      Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

    • Norethandrolone
      Nilevar
      Banned
      Click to expand
      Definition: Anabolic
    • Norfenefrine
      Energona, Esbuphon, Molycor-R, Nevadral, Norenol, Normetol, Novadral, Stagural, Vingsal, Zondel
      Banned
      Click to expand
      Definition: Stimulant
    • Norfenfluramine
      Banned
      Click to expand
      Definition: Stimulant
    • Norfluoxetine
      Banned
      Click to expand
      Definition: Fluoxetine metabolite
    • Normethandrolone
      Orga-Steron
      Banned
      Click to expand
      Definition: Anabolic
    • Norpseudoephedrine (Cathine)
      Adiposetten, Amorphan, Appetrol, Dietene, Miniscap, Minusin Depot, Mirapront N, Neo-Soldana, Nobese, Reduform, Thinz
      Banned
      Click to expand
      Definition: Stimulant
    • Nortestosterone (Nandrolone)
      See Nandrolone
      Banned
      Click to expand
      Definition: Anabolic
    • Nortriptyline
      Nortriptyline Hydrochloride, Aventyl, Pamelor, Noritren
      Banned
      Click to expand
      Definition: Antidepressant
    • Noscapine
      Anarcotine, Narcotine, Nectodon, Nospen
      Banned
      Click to expand
      Definition: Antitussive
    • Nylidrin (Buphenine)
      Arlibide, Arlidin, Diatolil, Dilatol, Dilydrin, Dilydrine Retard, Opino, Penitardon, Perdilatal Forte, Tocodilydrin, Tocodrine
      Banned
      Click to expand
      Definition: Sympathomimetic
    • Octadecafluoronaphthalene (Perfluorodecalin)
      Banned
      Click to expand
      Definition: Artificial gas carriers in blood
    • Octopamine
      Norden, Norfen, Norphen
      Banned
      Click to expand
      Definition: Stimulant
    • Olanzapine
      Olzapin, Rexapin, Zyprexa, Zyprexa, Zydis, Zalasta, Zolafren
      Banned
      Click to expand
      Definition: Antipsychotic
    • Olmesartan
      Benicar, Olmetec, Votum
      Banned
      Click to expand
      Definition: Antihypertensive
    • Olodaterol
      Conditionally Permitted
      Click to expand
      Definition: Bronchodilator
      Information:
      Olodaterol may be used in the treatment of respiratory diseases. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

      Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

      Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

    • Olpadronate
      Banned
      Click to expand
      Definition: Bone metabolism agent
    • Olsalazine
      Dipentum
      Banned
      Click to expand
      Definition: Gut anti-inflammatory
    • Omeprazole
      Gastroguard
      Permitted
      Click to expand
    • Opiates (class of drugs)
      Conditionally Permitted
      Click to expand
      Information:
      Some drugs in this classification are considered prohibited and therefore NOT accepted with a Medications Report Form.

      Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

      Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

    • Opipramol
      Ensidon, Insidon, Oprimol, Pramolan
      Banned
      Click to expand
      Definition: Psychoactive
    • Opromazine
      Banned
      Click to expand
      Definition: Antipsychotics
    • Orciprenaline
      Alotec, Alupent, Metaprel, Metaproterenol, Novasmasol
      Banned
      Click to expand
      Definition: Bronchodilator
    • Oripavine
      Banned
      Click to expand
      Definition: Opiod analgesic
    • Orphenadrine
      Banflex, Biorphen, Brocasipal, Disipal, Flexon, Mephenamin, Norflex
      Banned
      Click to expand
      Definition: Antihistamine
    • Osterine
      Enobosarm
      Banned
      Click to expand
      Definition: Selective Androgen Receptor Modulator (SARM)
    • Oxabolone
      Steranabol Depot, Steranabol Ritardo
      Banned
      Click to expand
      Definition: Anabolic
    • Oxaflumazine
      Banned
      Click to expand
      Definition: Psychosedative
    • Oxandrolone
      Oxandrin
      Banned
      Click to expand
      Definition: Anabolic
    • Oxaprozin
      Daypro, Duraprox
      Banned
      Click to expand
      Definition: Non-steroidal anti-inflammatory drug
    • Oxazepam
      Alepam, Medopam, Murelax, Noripam, Ox-Pam, Purata, Serax, Serepax
      Conditionally Permitted
      Click to expand
      Definition: Sedative
      Information:
      Oxazepam may be used to reduce anxiety and as a sedative. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

      Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

      Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

    • Oxazolam
      Convertal, Hializan, Serenal, Tranquit
      Banned
      Click to expand
      Definition: Anxiolytic
    • Oxcarbazepine
      Oxaleptal, Trileptal
      Banned
      Click to expand
      Definition: Anticonvulsant
    • Oxethazaine
      Intracoat
      Banned
      Click to expand
      Definition: Topical anaesthetic
    • Oxilofrine (Hydroxyephedrine)
      Banned
      Click to expand
      Definition: Stimulant
    • Oxolamine
      Bredon, Oxolev, Tussibron
      Banned
      Click to expand
      Definition: Antitussive
    • Oxprenolol
      Captol, Corbeton, Coretal, Laracor, Slow-Pren, Slow-Trasicor, Tevacor, Trasacor, Trasicor, Trasitensin, Trasidex
      Banned
      Click to expand
      Definition: Beta blocker
    • Oxybuprocaine
      Novesin, Novesine
      Banned
      Click to expand
      Definition: Local anaesthetic
    • Oxycodone
      Endocet, Endodan, OxyContin, OxyIR, Percocet, Percodan, Roxicodone, Roxicet, Roxiprin, Tylox
      Banned
      Click to expand
      Definition: Opiod analgesic
    • Oxyguno
      Banned
      Click to expand
      Definition: Anabolic
    • Oxymesterone
      Anamidol
      Banned
      Click to expand
      Definition: Anabolic
    • Oxymetazoline
      Afrin, Dristan, Mucinex Full Force, Vicks Sinex
      Banned
      Click to expand
      Definition: Topical decongestant
    • Oxymetholone
      Adroyd, Anadrol, Anadroyd, Anapolon, Anasteron, Anasteronal, Nastenon, Pardroyd, Plenastril, Synasteron, Zenalosyn
      Banned
      Click to expand
      Definition: Anabolic
    • Oxymorphone
      Numorphan, Nucodan, Opana
      Banned
      Click to expand
      Definition: Opiod analgesic
    • Oxypertine
      Banned
      Click to expand
      Definition: Neuroleptic
    • Oxyphenbutazone
      Butafen, Californit, Phlogont, Tandearil, Tanderil
      Conditionally Permitted
      Click to expand
      Definition: Non-steroidal anti-inflammatory
      Information:
      Oxyphenbutazone may be used to relieve pain, inflammation and control fever. It is a metabolite of phenylbutazone, a Controlled Medication. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

      Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

      Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

    • Oxyphencyclimine
      Daricon
      Banned
      Click to expand
      Definition: Antimuscarinic
    • Oxyphenonium
      Antrenyl, Argicillin, Endiform, DCF Oxyphenonium, Spastrex
      Banned
      Click to expand
      Definition: Antimuscarinic
    • Oxytocin
      Conditionally Permitted
      Click to expand
      Definition: Hormone
      Information:
      Oxytocin may stimulate uterine contractions and lactation. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

      Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

      Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

    • Paliperidone
      Invega Sustenna
      Banned
      Click to expand
      Definition: Antipsychotic
    • Palmitoylethanolamid (PEA)
      Conditionally Permitted
      Click to expand
      Definition: Analgesic
      Information:
      Palmitoylethanolamid (PEA) may be used to relieve pain and inflammation. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

      Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

      Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

    • Pamidronate
      Aredia, Pamimed
      Banned
      Click to expand
      Definition: Bone metabolism agent
    • Pancuronium
      Bemicin, Bromurex, Curon-B, Minopres, Panconium, Pancuron, Pancuronium, Parulon, Pavulon, Pavulone, Plumger
      Banned
      Click to expand
      Definition: Muscle relaxant
    • Papaverine
      Artegodan, Ceraspan, Opdensit, Optenyl, Pameion, Panergon, Pavacap, Pavacen, Pavakey, Pavatym, Paveron, Qua Bid
      Banned
      Click to expand
      Definition: Opiate - muscle spasm treatment
    • Paracetamol (Acetaminophen)
      Anacin, Panadol, Paracetamol, Tempra, Tylenol
      Conditionally Permitted
      Click to expand
      Definition: Analgesic
      Information:
      Paracetamol (Acetaminophen) may be used to relieve pain and control fever. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

      Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

      Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

    • Paraldehyde
      Paral
      Banned
      Click to expand
      Definition: Anticonvulsant
    • Paramethadione
      Banned
      Click to expand
      Definition: Anabolic
    • Paramethasone
      Cortidene, Depodillar, Dillar, Haldrone, Metilar, Monocortin, Paramezone, Triniol
      Banned
      Click to expand
      Definition: Corticosteroid
    • Paraxanthine
      Conditionally Permitted
      Click to expand
      Definition: Stimulant
      Information:
      Paraxanthine may simulate the central nervous system and is a metabolite of caffeine, a Controlled Medication. Paraxanthine is a Specified Substance. Specified Substances should not in any way be considered less important or less dangerous than other Prohibited Substances. Rather, they are simply substances which are more likely to have been ingested by Horses for a purpose other than the enhancement of sport performance, for example, through a contaminated food substance. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

      Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

      Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

    • Pargyline
      Eudatin, Eutonyl, Eutonyl-Ten, Supirdyl
      Banned
      Click to expand
      Definition: Mono-amine oxidase inhibitor
    • Paroxetine
      Aropax, Aroxat, Cebrilin, Deroxat, Eutimil, Paroxetine, Seroxat
      Banned
      Click to expand
      Definition: Antidepressant
    • Pemoline
      Cylert, Deltamine, Dynalert, Hyton ASA, Kethamed, Pemoline, Ronyl, Sigmadyn, Stimul, Tradon, Volital
      Banned
      Click to expand
      Definition: Stimulant
    • Pempidine
      Perolysen
      Banned
      Click to expand
      Definition: Ganglionic blocker
    • Penbutolol
      Betapresin, Betapressin, Blocotin, Ipobar, Levatol, Lobeta
      Banned
      Click to expand
      Definition: Beta blocker
    • Penfluridol
      Cyperon, Flupidol, Semap
      Banned
      Click to expand
      Definition: Antipsychotic
    • Pentaerythritol Tetranitrate
      Antime, Cardiacap, cordilate, Dilcoran, Duotrate, Lentrat, Metranil, Mycardol, Mycartal, Niscodil, Nitrodex, Nitropent, Penritol, Pentafin, Pentanitrine, Pentral, Pentrit, Pentryate, Peritrate, Petrin, Quintrate
      Banned
      Click to expand
      Definition: Vasodilator
    • Pentazocine
      Fortral, Fortwin, Liticon, Pentafen, Pentalgina, Pentawin
      Banned
      Click to expand
      Definition: Narcotic
    • Pentetrazol
      Cardiazol, Cardiorapide, Metrazol
      Banned
      Click to expand
      Definition: Stimulant
    • Pentifylline
      Cosadon, Cosaldon
      Banned
      Click to expand
      Definition: Vasodilator
    • Pentobarbital
      Embutal, Nembutal, Neodorm, Pentobarbital, Pentone, Sagatal, Sopental
      Banned
      Click to expand
      Definition: Sedative
    • Pentoxifylline
      Azutretat, Claudicat, Durapental, Hemovas, Pento-Puren, Rentylin, Tarontal, Terental, Torental, Trental
      Conditionally Permitted
      Click to expand
      Definition: Vasoprotective
      Information:
      Pentoxifylline may be used in the treatment of vascular diseases. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

      Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

      Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

    • Pentoxyverine (Carbetapentane)
      Atussil, Germapect, Sedotussin, Toclase, Tussa-Tablinen
      Banned
      Click to expand
      Definition: Antitussive
    • Pentylenetetrazole (Leptazole)
      Banned
      Click to expand
      Definition: Stimulant
    • Perfluorocarbons
      Banned
      Click to expand
      Definition: Artificial gas carriers in blood
    • Perfluorodecalin (Octadecafluoronaphthalene)
      Banned
      Click to expand
      Definition: Artificial gas carriers in blood
    • Perfluorooctylbromide
      Banned
      Click to expand
      Definition: Artificial gas carriers in blood
    • Perfluorotripropylamine
      Banned
      Click to expand
      Definition: Artificial gas carriers in blood
    • Pergolide Mesylate
      Aroltex, Breator, Celance, Geranil, Nopar, Parkotil, Parlide, Pergolide, Permax, Pharken, Prascend
      Conditionally Permitted
      Click to expand
      Definition: Dopamine agonist
      Information:
      Pergolide may be used in the treatment of Pituitary Pars Intermedia dysfunction (PPID), commonly known as Equine Cushings disease. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

      Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

      Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

    • Periciazine (Pericyazine)
      Aolept, Nemactil, Neulactil, Neuleptil
      Banned
      Click to expand
      Definition: Antipsychotic
    • Pericyazine (Periciazine)
      Aolept, Nemactil, Neulactil, Neuleptil
      Banned
      Click to expand
      Definition: Antipsychotic
    • Perindoprilat
      Banned
      Click to expand
      Definition: Angiotensin-converting enzyme inhibitor
    • Perinodopril
      Banned
      Click to expand
      Definition: Antihypertensive
    • Perlapine
      Hypnodin
      Banned
      Click to expand
      Definition: Hypnotic
    • Perphenazine
      Decentan, Fentazin, Perfenil, Phenazine, Trilafon, Trilifan
      Banned
      Click to expand
      Definition: Tranquiliser/phenothiazine derivative
    • Pethidine (Meperidine)
      Centralgine, Demarol, Demerol, Dispadol, Dolantin, Dolcontral, Dolosal, Lidol, Lydol, Meperidol, Nemerol, Petantin, Pethanol, Pethidine, Petydyna, Piperosal, Piridosal
      Banned
      Click to expand
      Definition: Narcotic
    • Phenacemide
      Epiclase, Phenurone, Phetylureum
      Banned
      Click to expand
      Definition: Anticonvulsant
    • Phenacetin (Acetophenetidin)
      Codempiral, Commotional, Contradouleur, Emprazil, P-A-C Compound, Paramette, Phenaphen Plus, Stellacyl, Thephorin A-C
      Banned
      Click to expand
      Definition: Analgesic
    • Phenaglycodol
      Ultran-Lilly
      Banned
      Click to expand
      Definition: Tranquiliser
    • Phenazocine
      Narphen, Prinadol
      Banned
      Click to expand
      Definition: Opiod analgesic
    • Phenazone
      Aurafair Otic, Auralgicin, Auraltone, Sedaural, Tympagesic
      Banned
      Click to expand
      Definition: Analgesic
    • Phenazopyridine
      Azodine, Phenazo, Pyridacil, Pyridium, Pyronium, Urogesic, Uropyrine
      Banned
      Click to expand
      Definition: Analgesic
    • Phencyclidine
      Banned
      Click to expand
      Definition: Anaesthetic
    • Phendimetrazine
      Adipost, Anorex, Antapentan, Bacarate, Bontril, Hyrex-105, Melfiat, Obesan-X, Phenazine, Plegine, PT-105
      Banned
      Click to expand
      Definition: Stimulant
    • Phenelzine
      Nardelzine, Nardil, Phenalzine, Phenelezine, Stinerval
      Banned
      Click to expand
      Definition: Psychoactive
    • Phenethylline (Fenethylline, Fenetylline, Phenetylline)
      Biocapton, Captagon, Fitton
      Banned
      Click to expand
      Definition: Stimulant
    • Phenetylline(Fenethylline, Fenetylline, Phenethylline)
      Biocapton, Captagon, Fitton
      Banned
      Click to expand
      Definition: Stimulant
    • Phenibut
      Focus Calm Horse Supplement
      Banned
      Click to expand
      Definition: Central Nervous System depressant
    • Phenindamine
      Nolahist, Thephorin
      Banned
      Click to expand
      Definition: Antihistamine
    • Phenindione
      Danilone, Dindevan, Emandione, Pindione
      Banned
      Click to expand
      Definition: Anticoagulant
    • Pheniramine
      Aviletten, Inhiston, Fenamine, Metron, Pyriton, Tripoton
      Conditionally Permitted
      Click to expand
      Definition: Antihistamine
      Information:
      Pheniramine may be used in the control of allergies. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

      Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

      Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

    • Phenmetrazine
      Preludin
      Banned
      Click to expand
      Definition: Stimulant
    • Phenobarbital
      Aphenylbarbit, Aphenyletten, Comizial, Fenemal, Gardenale, Lethyl, Lumen, Luminaletten, Phenobarbitone, Sedofen, Solfoton
      Banned
      Click to expand
      Definition: Sedative
    • Phenoxybenzamine
      Dibenyline, Dibenzyline, Dibenzyran
      Banned
      Click to expand
      Definition: Antihypertensive
    • Phenprocoumon
      Liquamar, Marcoumar, Marcumar, Marcuphen, Phenpro
      Banned
      Click to expand
      Definition: Anticoagulant
    • Phenpromethamine
      Banned
      Click to expand
      Definition: Stimulant
    • Phensuximide
      Milontin, Succitimal
      Banned
      Click to expand
      Definition: Muscle relaxant
    • Phentermine
      Adipex, Duromine, Fastin, Lonamin, Minobese, Omnibex, Panbesy, Phentermine, Phentermyl, Teramine
      Banned
      Click to expand
      Definition: Anticonvulsant
    • Phentolamine
      Dibasin, Regitipe, Rigitine, Vasomax
      Banned
      Click to expand
      Definition: Vasodilator
    • Phenylbutazone
      Alqoverin, Artrizin, Artropan, Azolid, Butacote, Butadion, Butagesic, Butalgina, Butaphen, Butapirazol, Butartril, Butazolidin, Butazone, Bute, Butoz, Butrex, Diossidone, Equipalazone, Fenilbutina, Inflazone, Intrabutazone, Malgesic, Promifen, Phenylarthrite.
      Permitted
      Click to expand
      Definition: Non-steroidal anti-inflammatory
      Information:
      Phenylbutazone may be used to relieve pain, inflammation and control fever. The maximum permitted plasma concentration of phenylbutazone is 15.0 micrograms per milliliter.
    • Phenylephrine
      Analux, Fenox, Isopto Frin, Minims Phenylephrine Hydrochloride, Mydfrin, Neo-Synephrine, Nostril, Prefrin, Visadron, Vistosan
      Banned
      Click to expand
      Definition: Stimulant
    • Phenyliprazine
      Banned
      Click to expand
      Definition: Antidepressant
    • Phenylpiracetam (Carphedon)
      Phenotropil
      Banned
      Click to expand
      Definition: Stimulant
    • Phenylpropanolamine
      Acutrim, Control, Dexatrim, Fugoa N, Kontexin, Monydrin, Procol, Propadrine, Propagest, Rhindecon, Rinexin
      Banned
      Click to expand
      Definition: Stimulant
    • Phenyltoloxamine
      Antin, Bistrimin, Bristamin, Histionex
      Banned
      Click to expand
      Definition: Antihistamine
    • Phenytoin
      Antisacer, Citrullamon, Dantoine, Difhydan, Dilantin, Dintoina, Diphantoine, Epanutin, Epilantine, Labopal, Lehydan, Pyoredol, Solantyl, Toin Unicelles
      Banned
      Click to expand
      Definition: Anticonvulsant
    • Pholcodine
      Actuss, Adaphol, Codisol, Dia-Tuss, Duro-Tuss, Galenphol, Homocodeine, Lantuss, Pavacol-D, Pholcolin, Tussinol, Tussokon, Tuxi
      Banned
      Click to expand
      Definition: Antitussive
    • Pholedrine
      Epifen, Isodrin, Isodrine, Isodrinum, Paredrinol, Pholetone, Promethin, Prometin, Pulsotyl, Stimatone, Sympropamin, Syncordan, Terapinyl, Varitol, Veritain, Veritol
      Banned
      Click to expand
      Definition: Stimulant
    • Physostigmine
      Calabarine, Cogmine Eserine, Erserine, Eserine, Esromiotin, Ezerin, Isopto Eserine, Physostigmine 9599, Physostol
      Conditionally Permitted
      Click to expand
      Definition: Parasympathomimetic
      Information:
      Physostigmine may be used in the treatment of opthalmic disease. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

      Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

      Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

    • Picrotoxin
      Cocculin
      Banned
      Click to expand
      Definition: Stimulant
    • Piminodine
      Alvodine
      Banned
      Click to expand
      Definition: Opiod analgesic
    • Pimozide
      Opiran, Orap, Orap Forte, Pizide
      Banned
      Click to expand
      Definition: Antipsychotic
    • Pinazepam
      Domar, Duna
      Banned
      Click to expand
      Definition: Anxiolytic
    • Pindolol
      Barbloc, Betadren, Carvisken, Decreten, Durapindol, Hexapindol, Pectobloc, Pinbetol, Viskeen, Visken
      Banned
      Click to expand
      Definition: Beta blocker
    • Pioglitazone
      Actos
      Conditionally Permitted
      Click to expand
      Definition: Anti-hyperglycaemic
      Information:
      Pioglitazone may be used in the treatment of equine metabolic syndrome. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

      Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

      Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

    • Pipamazine
      Banned
      Click to expand
      Definition: Anti-emetic/mild tranquiliser
    • Pipamperone
      Dipiperone, Propitan
      Banned
      Click to expand
      Definition: Antipsychotic
    • Pipecuronium
      Aperomid, Arduan, Arpilon
      Banned
      Click to expand
      Definition: Muscle relaxant
    • Pipenzolate
      Expal, Piper, Piptal, Pipzen
      Banned
      Click to expand
      Definition: Antimuscarinic
    • Pipequaline
      Banned
      Click to expand
      Definition: Anxiolytic
    • Piper Methysticum
      Kava
      Banned
      Click to expand
      Definition: Anti-psychotic
    • Piperacetazine
      Psymod, Quide
      Banned
      Click to expand
      Definition: Sedative
    • Piperidione
      Ascron, Sedilan, Sedulon, Tusseval
      Banned
      Click to expand
      Definition: Anticholinergic
    • Piperidolate
      Dactil, Crapinon, Edelel
      Banned
      Click to expand
      Definition: Anticholinergic
    • Piperocaine
      Metycaine Hydrochloride
      Banned
      Click to expand
      Definition: Local anaesthetic
    • Piperoxan
      Banned
      Click to expand
      Definition: Adrenergic blocker
    • Pipotiazine
      Lonseren, Piportil, Piportyl
      Banned
      Click to expand
      Definition: Antipsychotic
    • Pipradol (Pipradrol)
      Meretran
      Banned
      Click to expand
      Definition: Stimulant
    • Piquindone
      Trade names are not currently listed on this site.
      Banned
      Click to expand
      Definition: Antipsychotic
    • Piracetam
      Avigilen, Cerebroforte, Cerebropan, Cerebrosteril, Cetam, Ciclofalina, Cuxabrain, Durapitrop, Encetrop, Memo-Puren, Noostan, Nootrop, Nootropil, Normabrain, Norzetam, Pirroxil, Psycoton
      Banned
      Click to expand
      Definition: Stimulant
    • Pirbuterol
      Exirel, Maxair, Maxair Autohaler, Spirolair, Zeisin
      Conditionally Permitted
      Click to expand
      Definition: Bronchodilator
      Information:
      Pirbuterol may be used in the treatment of respiratory diseases. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

      Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

      Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

    • Piretanide
      Arelix, Diumax, Tauliz
      Banned
      Click to expand
      Definition: Diuretic
    • Piroxicam
      Antiflog, Artroxicam, Baxo, Dexicam, Doblexan, Felden, Feldene, Flogobene, Improntal, Lampoflex, Larapam, Nirox, Novo-Pirocam, Piroftal, Polipirox, Reudene, Roxene, Roxiden, Sasulen, Vitaxicam, Zacam
      Conditionally Permitted
      Click to expand
      Definition: Non-steroidal anti-inflammatory
      Information:
      Piroxicam acid may be used to relieve pain and inflammation and treat certain cancers. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

      Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

      Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

    • Pirprofen
      Rangasil, Rengasi, Rengasil
      Banned
      Click to expand
      Definition: Non-steroidal anti-inflammatory drug
    • Pitcher Plant extract
      Sarapin
      Conditionally Permitted
      Click to expand
      Definition: Analgesic
      Information:
      Pitcher plant extract may be used to relieve pain. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

      Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

      Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

    • Pizotifen
      Mosegor, Sandomigran, Sandomigrin, Sanmigran
      Banned
      Click to expand
      Definition: Antimigraine
    • Polythiazide
      Drenusil, Minizide, Nephril, Polypress, Renese
      Banned
      Click to expand
      Definition: Diuretic
    • Potassium Bromide
      Dibro-Be mono, Epilease, Bromapex, Epibrom
      Conditionally Permitted
      Click to expand
      Definition: Inorganic compound
      Information:
      Potassium Bromide may be used in the treatment of colic, as an anti-convulsant and have sedative effects. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

      Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

      Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

    • Practolol
      Dalzic, Eraldin, Eraldina, Teranol
      Banned
      Click to expand
      Definition: Beta blocker
    • Pramoxine
      Anugesic
      Conditionally Permitted
      Click to expand
      Definition: Local anaesthetic
      Information:
      Pramoxine is used for the temporary local relief of pain. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

      Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

      Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

    • Prasterone
      Intrarosa
      Banned
      Click to expand
      Definition: Anabolic
    • Prazepam
      Demetrin, Lysaxia, Prazene
      Banned
      Click to expand
      Definition: Anxiolytic
    • Prazosin
      Hypovase
      Conditionally Permitted
      Click to expand
      Definition: Antihypertensive
      Information:
      Prazosin may be used in the treatment of hypertension and heart disease. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

      Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

      Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

    • Prednisolone
      Codelcortone, Deltacortril, Dhasolone, Pred Forte, Prednisol, Predsolone, Prelone, Solone
      Conditionally Permitted
      Click to expand
      Definition: Corticosteroid
      Information:
      Prednisolone is used for the treatment of auto-immune disorders, and as an inflammatory and immunosuppressive medication. Prednisolone is a Threshold Substance. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

      Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

      Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

    • Prednisone
      Deltisone, Hostacortin, Meticorten, Predni Tablinen, Sone, Sterapred, Ultracortene
      Conditionally Permitted
      Click to expand
      Definition: Corticosteroid
      Information:
      Prednisone is used for the treatment of auto-immune disorders, and as an inflammatory and immunosuppressive medication. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

      Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

      Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

    • Pregabalin
      Alzain, Axalid, Lecaent, Lyrica
      Conditionally Permitted
      Click to expand
      Definition: Anti-convulsant
      Information:
      Pregabalin may be used in the treatment of epilepsy and pain. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

      Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

      Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

    • Prenylamine
      Segontin
      Banned
      Click to expand
      Definition: Vasodilator
    • Pridinol
      Lyseen, Nonplesin, ParKS
      Banned
      Click to expand
      Definition: Muscle relaxant
    • Prifinium Bromide
      Padrin, Riabal
      Conditionally Permitted
      Click to expand
      Definition: Anti-spasmodic
      Information:
      Prifinium bromide may be used to relieve pain and spasms. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

      Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

      Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

    • Prilocaine
      Citanest, Citocaina, Pristesin F, Xylonest, Xylonest-Octapressin
      Banned
      Click to expand
      Definition: Local anaesthetic
    • Primidone
      Mylepsinum, Mysoline
      Banned
      Click to expand
      Definition: Anticonvulsant
    • Probenecid
      Benemid, Benemide, Benuryl, Probecid, Pro-Cid, Solpurin, Urocid
      Banned
      Click to expand
      Definition: Diuretic
    • Procainamide
      Pronestyl, Procan, Procanbid
      Conditionally Permitted
      Click to expand
      Definition: Anti-arrhythmic
      Information:
      Procainamide may be used in the treatment of heart rhythm abnormalities. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

      Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

      Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

    • Procaine
      Depocillin, Duphapen, Neopen
      Banned
      Click to expand
      Definition: Local anaesthetic
    • Procarbazine
      Matulane, Natulan
      Banned
      Click to expand
      Definition: Chemotherapy
    • Procaterol
      Meptin
      Banned
      Click to expand
      Definition: Beta adrenergic receptor agonist
    • Prochlorperazine
      Stemetil
      Banned
      Click to expand
      Definition: Antipsychotic
    • Procyclidine
      Arpicolin, Kemadrin
      Banned
      Click to expand
      Definition: Anticholinergic
    • Proglumide
      Milid
      Banned
      Click to expand
      Definition: Cholecystokinin antagonist
    • Proguanil
      Paludrine
      Banned
      Click to expand
      Definition: Antimalarial
    • Prolintane
      Promotil, Katovit N
      Banned
      Click to expand
      Definition: Stimulant
    • Promazine
      Liranol, Prazine, Protactyl, Sparine, Talofen
      Banned
      Click to expand
      Definition: Sedative
    • Promethazine
      Phenergan, Fargan, Romergan, Promethagan
      Banned
      Click to expand
      Definition: Antihistamine
    • Pronethalol
      Alderlin, Nethalide
      Banned
      Click to expand
      Definition: Anti-arrhythmic
    • Propafenone
      Arythmol, Rythmol
      Banned
      Click to expand
      Definition: Anti-arrhythmic
    • Propallylonal
      Quietal
      Banned
      Click to expand
      Definition: Sedative
    • Propanidid
      Epontol
      Banned
      Click to expand
      Definition: Anaesthetic
    • Propantheline (Propanthelline)
      Corrigast, Ercorax, Ercoril, Ercotina, Pantheline, Pro-Banthine, Propantel
      Conditionally Permitted
      Click to expand
      Definition: Anticholinergic
      Information:
      Propantheline (Propanthelline) may be used in muscle spasms of the digestive tract. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

      Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

      Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

    • Propanthelline (Propantheline)
      Corrigast, Ercorax, Ercoril, Ercotina, Pantheline, Pro-Banthine, Propantel
      Conditionally Permitted
      Click to expand
      Definition: Anticholinergic
      Information:
      Propanthelline (Propantheline) may be used in muscle spasms of the digestive tract. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

      Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

      Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

    • Proparacaine (Proxymetacaine)
      See Proxymetacaine
      Banned
      Click to expand
      Definition: Local anaesthetic
    • Propentofylline
      Vivitonin
      Banned
      Click to expand
      Definition: Bronchodilator
    • Propiomazine
      Largon
      Banned
      Click to expand
      Definition: Tranquiliser
    • Propionylpromazine
      Banned
      Click to expand
      Definition: Tranquilizer
    • Propiram
      Dirame
      Banned
      Click to expand
      Definition: Opiod receptor agonist
    • Propofol
      Rapinovet, PropoFlo
      Conditionally Permitted
      Click to expand
      Definition: Anaesthetic
      Information:
      Propofol may be used for sedation or to induce anaesthesia. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

      Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

      Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

    • Propoxycaine
      Pravocaine, Ranocaine
      Banned
      Click to expand
      Definition: Local anaesthetic
    • Propoxyphene
      Capadex, Darvon, Darvocet-N, Di-Antalvic, Di-Gesic, Lentogesic
      Banned
      Click to expand
      Definition: Opiod analgesic
    • Propranolol
      Inderal, Avlocardyl, Deralin
      Banned
      Click to expand
      Definition: Beta blocker
    • Propylhexedrine
      Benzedrex, Eggobesin, Eventin, Eventine
      Banned
      Click to expand
      Definition: Stimulant
    • Propyphenazone
      Saridon
      Banned
      Click to expand
      Definition: Non-steroidal anti-inflammatory drug
    • Proquazone
      Biarison
      Banned
      Click to expand
      Definition: Non-steroidal anti-inflammatory drug
    • Prostanozol
      Prostanozol
      Banned
      Click to expand
      Definition: Anabolic
    • Prothipendyl
      Tolnate
      Banned
      Click to expand
      Definition: Antipsychotic
    • Protokylol
      Asmetil, Beres, Caytine, Palison, Ventaire
      Banned
      Click to expand
      Definition: Sympathomimetic
    • Protriptyline
      Triptil, Vivactil
      Banned
      Click to expand
      Definition: Stimulant antidepressant
    • Proxibarbital
      Ipronal
      Banned
      Click to expand
      Definition: Sedative
    • Proxymetacaine (Proparacaine)
      Minims Proxymetacaine, Alcaine
      Banned
      Click to expand
      Definition: Local anaesthetic
    • Proxyphylline
      Brontyl, Monophyllin, Monophylline, Neofyllin, Proxy-Retardoral, Purofilina, Purophyllin, Sanwaphyllin, Sigophyl, Spantin, Spasmolysin, Thean, Theoden
      Banned
      Click to expand
      Definition: Bronchodilator
    • Pseudoephedrine
      Sudafed, Galpseud
      Banned
      Click to expand
      Definition: Stimulant
    • Psilocin
      Banned
      Click to expand
      Definition: Psychedelic
    • Pyridostigmine
      Mestinon, Regonol
      Banned
      Click to expand
      Definition: Anticholinesterase
    • Pyrilamine (Mepyramine)
      Albatussin, Anthisan
      Conditionally Permitted
      Click to expand
      Definition: Antihistamine
      Information:
      Pyrilamine (Mepyramine) may be used in the control of allergies. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

      Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

      Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

    • Pyrimethamine
      Daraprim, Erbaprelina, Pirimecidan, Tindurin
      Conditionally Permitted
      Click to expand
      Definition: Anti-parasitic
      Information:
      Pyrimethamine may be used in the treatment of parasitic disease such as malaria and toxoplasmosis. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

      Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

      Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

    • Pyrithyldione
      Persedon
      Banned
      Click to expand
      Definition: Sedative
    • Pyrrobutamine
      Banned
      Click to expand
      Definition: Antihistamine
    • Quetiapine
      Seroquel
      Banned
      Click to expand
      Definition: Dopamine agonist
    • Quinalbarbital (Secobarbitone)
      Barbosec, Bipanal, Bipinal, Evronal, Evrronal, Hypotrol, Hyptran, Imesonal, Immenox, Meballymal, Meballymalum, Novosecobarb, Quinalspan, Sebar, Secobarbital, Sedutain, Seotal, Sodium Seconal, Somosal, Synate, Trisomnin
      Banned
      Click to expand
      Definition: Sedative
    • Quinbolone
      Anabolicum Vister
      Banned
      Click to expand
      Definition: Anabolic
    • Quinethazone
      Aquamox, Hydromox, Idrokin
      Conditionally Permitted
      Click to expand
      Definition: Diuretic
      Information:
      Quinethazone may be used in the control of hypotension and oedema With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

      Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

      Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

    • Quinidine
      Biquin, Chinidin, Kiditard, Kinichron, Kinidin, Kinidin Durules, Kinidine, Longachin, Longacor, Quinaglute, Quinalan, Quinidine, Quinobarb, Solfachinid, Systodin
      Conditionally Permitted
      Click to expand
      Definition: Anti-arrhythmic
      Information:
      Quinidine may be used in the treatment of heart rhythm abnormalities. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

      Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

      Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

    • Quinine
      Adaquin, Bi-Chinine, Biquinate, Chinine, Kinin, Legatrin, Myoquin, Quinamm, Quinate, Quinbisul, Quindan, Quinine, Quinoctal, Quinsul, Quiphile
      Conditionally Permitted
      Click to expand
      Definition: Anti-parasitic
      Information:
      Quinine may be used in the treatment of malaria and babesiosis. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

      Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

      Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

    • Quinisocaine
      Isochinol, Dimethisoquin, Haenal, Histaderme, Prulantex, Pruralgan, Pruralgin, Quinoleine, Quotane
      Banned
      Click to expand
      Definition: Topical anaesthetic
    • Ractopamine
      Paylean
      Banned
      Click to expand
      Definition: Beta agonist
    • RAD140
      Banned
      Click to expand
      Definition: Anabolic
    • Raloxifene
      Evista
      Banned
      Click to expand
      Definition: Oestrogen receptor modulator
    • Ramifenazone (Isopyrin)
      Delta-Tomanol, Tomanol
      Banned
      Click to expand
      Definition: Pain relief
    • Rauwolfia
      Banned
      Click to expand
      Definition: Tranquiliser
    • Remifentanil
      Ultiva
      Banned
      Click to expand
      Definition: Opiod analgesic
    • Reproterol
      Bronchodil, Bronchospasmin, Broncospasmin, Epiferol, Gensasmol, Reprol, Sanasma, Teofluid
      Banned
      Click to expand
      Definition: Bronchodilator
    • Reserpine
      Novoreserpine, Serpasil
      Banned
      Click to expand
      Definition: Tranquiliser
    • Rimiterol
      Puilmodil
      Banned
      Click to expand
      Definition: Bronchodilator
    • Risedronate
      Actonel, Atelvia, Benet
      Banned
      Click to expand
      Definition: Bone metabolism agent
    • Risperidone
      Risperdal
      Banned
      Click to expand
      Definition: Antipsychotic
    • Ritodrine
      Yutopar
      Banned
      Click to expand
      Definition: Tocolytic
    • Rofecoxib
      Ceoxx, Ceeoxx, Vioxx
      Banned
      Click to expand
      Definition: Non-steroidal anti-inflammatory drug
    • Romifidine
      Sedivet Solution I.V.
      Permitted
      Click to expand
      Definition: Sedative
      Information:
      Romifidine (Sedivet) is permitted to be administered at a maximum dosage of 5mg 30 minutes (if using 10mg/ml concentration of Romifidine the allowable dose is 0.5ml; if using other concentrations of compounded Romifidine consult with a veterinarian for appropriate dosing) prior to competition.
    • Ropivacaine
      Naropin
      Banned
      Click to expand
      Definition: Local anaesthetic
    • Roxadustat
      Banned
      Click to expand
      Definition: Hypoxia Inducible Factor Activator
    • S4
      Banned
      Click to expand
      Definition: Anabolic
    • Salbutamol (Albuterol)
      Ventolin, Proventil, Torpex, Volmax, Ventipulmin
      Conditionally Permitted
      Click to expand
      Definition: Bronchodilator
      Information:
      Salbutamol (albuterol) may be used in the treatment of respiratory disease. The detection time is estimated with 96 hours (4 days) after inhalational administration. A detection time is not the same as a withdrawal time. The detection time is the approximate period of time for which a substance (or its metabolite) remains in a horse's system such that it can be detected by the laboratory. The withdrawal time for a substance adds a safety margin, chosen with professional judgment and discretion to allow for individual differences between horses such as size, metabolism, degree of fitness, recent illness or disease etc.. You are advised to seek suitable advice from your treating veterinarian. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

      Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

      Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

    • Salicylamide
      BC Powder
      Banned
      Click to expand
      Definition: Non-steroidal anti-inflammatory drug
    • Salicylic acid
      Aspirin, Clearasil Medicated Astringent, Compound-W, Cornina, Coroplast, Egocappol, Fomac, Gehwol, Guttaplast, Gyan, Hydrisalic, Ionil Plus, Keralyt, Occlusal, Phytodermine, Salac, Salicyl, Saligel, SaSha, Sebcur, Subucare, Soluver, Squamasol, Verrugon
      Permitted
      Click to expand
      Definition: Non-steroidal anti-inflammatory
      Information:
      Salicylic acid may be used to relieve pain, inflammation and control fever.
    • Salmeterol
      Aerometrol, Arial, Astmerole, Fujimycin, Salmetedur, Serevent
      Banned
      Click to expand
      Definition: Bronchodilator
    • Scopolamine (Hyoscine)
      Transderm-scop, Scopoderm
      Conditionally Permitted
      Click to expand
      Definition: Anticholinergic
      Information:
      Scopolamine (hyoscine) may be used in the treatment of gastrointestinal tract spams such as colic. Scopolamine (Hyoscine) is a Specified Substance. Specified Substances should not in any way be considered less important or less dangerous than other Prohibited Substances. Rather, they are simply substances which are more likely to have been ingested by Horses for a purpose other than the enhancement of sport performance, for example, through a contaminated food substance. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

      Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

      Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

    • Secobarbitone (Quinalbarbital)
      Barbosec, Bipanal, Bipinal, Evronal, Evrronal, Hypotrol, Hyptran, Imesonal, Immenox, Meballymal, Meballymalum, Novosecobarb, Quinalspan, Sebar, Secobarbital, Sedutain, Seotal, Sodium Seconal, Somosal, Synate, Trisomnin
      Banned
      Click to expand
      Definition: Sedative
    • Selegiline
      Eldepryl, Zelapar
      Banned
      Click to expand
      Definition: Stimulant
    • Sertraline
      Lustral
      Banned
      Click to expand
      Definition: Antidepressant
    • Sibutramine
      Reductil
      Banned
      Click to expand
      Definition: Stimulant
    • Sildenafil
      Viagra, Revatio
      Banned
      Click to expand
      Definition: Vasodilator
    • Sotalol
      Beta-Cardone, Sotacor
      Conditionally Permitted
      Click to expand
      Definition: Beta blocker
      Information:
      Sotalol may be used in the treatment of abnormal heart rhythms. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

      Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

      Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

    • Sparteine
      Depasan, Spartopan
      Banned
      Click to expand
      Definition: Anti-arrhythmic
    • Spironolactone
      Aldactone, Spiractin
      Banned
      Click to expand
      Definition: Diuretic
    • Stanozolol
      Winstrol, Sungate, Stargate
      Banned
      Click to expand
      Definition: Anabolic
    • Stenbolone
      Anatrofin
      Banned
      Click to expand
      Definition: Anabolic
    • Strychnine
      Boomer-Rid, Certox, Estricnina, Gopher Bait, Gopher-Gitter, Hare-Rid, Kwik-Kil, Mole Death, Mouse-Nots, Mouse-Rid, Mouse-Tox, Pied Piper Mouse Seed, Ro-Dex, Sanaseed, Strychnos
      Banned
      Click to expand
      Definition: Muscular convulsions
    • Styramate
      Linaxar, Sinaxar
      Banned
      Click to expand
      Definition: Anticonvulsant
    • Sufentanil
      Sufenta
      Banned
      Click to expand
      Definition: Opiod analgesic
    • Sulfasalazine
      Conditionally Permitted
      Click to expand
      Definition: Disease-Modifying Anti-Rheumatic Drug (DARD)
      Information:
      Sulfasalazine may be used in the treatment of gastrointestinal disease. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

      Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

      Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

    • Sulforidazine
      Imagotan, Inofal
      Banned
      Click to expand
      Definition: Antipsychotic
    • Sulindac
      Clinoril
      Banned
      Click to expand
      Definition: Non-steroidal anti-inflammatory drug
    • Sulpiride
      Dolmatil, Sulpor
      Banned
      Click to expand
      Definition: Antipsychotic
    • Sumatriptan
      Imigran
      Banned
      Click to expand
      Definition: Serotonin agonist - migraine treatment
    • Suprofen
      Maldocil, Masterfen, Procofen, Profenal, Srendam, Sulproltin, Suprocil, Suprol, Sutoprofen
      Conditionally Permitted
      Click to expand
      Definition: Non-steroidal anti-inflammatory
      Information:
      Suprofen may be used to relieve pain, inflammation and control fever. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

      Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

      Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

    • Suxibuzone
      Danilon
      Conditionally Permitted
      Click to expand
      Definition: Non-steroidal anti-inflammatory
      Information:
      Suxibuzone may be used to relieve pain, inflammation and control fever. It is a pro-drug of phenylbutazone, a Controlled Medication. The detection times should follow the same indications as phenylbutazone. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

      Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

      Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

    • Synephrine
      Chibro, Sympatol, Uvicol
      Banned
      Click to expand
      Definition: Stimulant
    • Tamoxifen
      Nolvadex
      Banned
      Click to expand
      Definition: Oestrogen receptor modulator
    • Temazepam
      Euhypnos, Normison, Temtabs
      Banned
      Click to expand
      Definition: Tranquilizer
    • Tenoxicam
      Mobiflex, Tilcotil
      Banned
      Click to expand
      Definition: Pain relief
    • Tepoxalin
      Zubrin
      Banned
      Click to expand
      Definition: Non-steroidal anti-inflammatory drug
    • Terazocin (Terazosin)
      Hytrin
      Banned
      Click to expand
      Definition: Alpha adrenergic blocker
    • Terazosin (Terazocin)
      Hytrin
      Banned
      Click to expand
      Definition: Alpha adrenergic blocker
    • Terbutaline
      Bricanyl, Brethine
      Conditionally Permitted
      Click to expand
      Definition: Bronchodilator
      Information:
      Terbutaline may be used in the treatment of respiratory diseases. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

      Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

      Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

    • Terfenadine
      Seldane, Teldane, Triludan
      Banned
      Click to expand
      Definition: Antihistamine
    • Testolactone
      Teslac
      Banned
      Click to expand
      Definition: Aromatase inhibitor
    • Testosterone
      Andriol, Androderm, Androgel, Androtardyl, Intrinsa, Striant, Testogel, Testopatch, Testoviron
      Banned
      Click to expand
      Definition: Anabolic
    • Tetracaine
      Ametop, Minims Amethocaine Hydrochloride
      Banned
      Click to expand
      Definition: Local anaesthetic
    • Tetrahydrogestrinone (THG)
      Banned
      Click to expand
      Definition: Anabolic
    • Thebaine
      Banned
      Click to expand
      Definition: Opiod alkaloid
    • Thenoic acid
      Thioveol
      Conditionally Permitted
      Click to expand
      Definition: D-amino acid oxidase inhibitor
      Information:
      Thenoic acid may be used in the treatment of respiratory disease. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

      Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

      Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

    • Theobromine
      Theosalvose
      Banned
      Click to expand
      Definition: Stimulant
    • Theophylline
      Elixophyllin, Novo-Theophyl, Nuelin, Quibron-T, Retafyllin, Theo-Dur, Theolair, Theolin, Uniphyl, Uniphyllin, Xanthium, Xantivent
      Banned
      Click to expand
      Definition: Bronchodilator
    • THG (Tetrahydrogestrinone)
      Banned
      Click to expand
      Definition: Anabolic
    • Thiethylperazine
      Torecan
      Banned
      Click to expand
      Definition: Anti-emetic
    • Thiopropazate
      Dartalan
      Banned
      Click to expand
      Definition: Antipsychotic
    • Thioproperazine
      Cephalmin, Majeptyl, Mazeptyl, Megeptil, Sulfenazin, Vontil
      Banned
      Click to expand
      Definition: Cataleptic
    • Thioridazine
      Mallorol, Mellaril-S, Melleril, Melleretten, Novoridazine, Ridazine, Thioril
      Banned
      Click to expand
      Definition: Antipsychotic
    • Thiothixene
      Navane
      Banned
      Click to expand
      Definition: Antipsychotic
    • Thonzylamine
      Neohetramine, Tonamil
      Banned
      Click to expand
      Definition: Antihistamine
    • Thozalinone
      Stimsen
      Banned
      Click to expand
      Definition: Psychoactive
    • Thymosin (synthetic fragments)
      TB500
      Banned
      Click to expand
      Definition: Anabolic
    • Tiaprofenic Acid
      Surgam, Surgamyl, Tiaprofen
      Banned
      Click to expand
      Definition: Non-steroidal anti-inflammatory drug
    • Tibolone
      Livial
      Banned
      Click to expand
      Definition: Anabolic
    • Tildronate
      Tildren
      Conditionally Permitted
      Click to expand

      Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

      Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

    • Tiletamine
      Telazol
      Conditionally Permitted
      Click to expand
      Definition: Anaesthetic
      Information:
      Tiletamine is a general anaesthetic agent resulting in sedation, immobility, amnesia and analgesia. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

      Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

      Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

    • Tilidin
      Valoron
      Banned
      Click to expand
      Definition: Opioid
    • Tiludronate disodium
      Tildren bisphosphonate
      Conditionally Permitted
      Click to expand

      Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

      Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

    • Tiludronic Acid
      Tildren, Skelid
      Conditionally Permitted
      Click to expand
      Definition: Bisphosphonate
      Information:
      Tiludronic acid may be used in the treatment of orthopaedic disease. The detection time is estimated with 672 hours (28 days) after oral administration. A detection time is not the same as a withdrawal time. The detection time is the approximate period of time for which a substance (or its metabolite) remains in a horses system such that it can be detected by the laboratory. The withdrawal time for a substance adds a safety margin, chosen with professional judgment and discretion to allow for individual differences between horses such as size, metabolism, degree of fitness, recent illness or disease etc.. You are advised to seek suitable advice from your treating veterinarian. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

      Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

      Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

    • Timolol
      Blocadren, Timoptol
      Conditionally Permitted
      Click to expand
      Definition: Beta blocker
      Information:
      Timolol may be used in the treatment of ocular diseases. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

      Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

      Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

    • Tiotropium
      Spiriva
      Conditionally Permitted
      Click to expand
      Definition: Bronchodilator
      Information:
      Tiotropium may be used in the treatment of respiratory diseases. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

      Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

      Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

    • Tocainide
      Tonocard
      Banned
      Click to expand
      Definition: Local anaesthetic
    • Tofenacin
      Elamol, Tofacine
      Banned
      Click to expand
      Definition: Antidepressant
    • Tolfenamic Acid
      Clotam Rapid
      Banned
      Click to expand
      Definition: Non-steroidal anti-inflammatory drug
    • Tolmetin
      Tolectin
      Banned
      Click to expand
      Definition: Non-steroidal anti-inflammatory drug
    • Tolvaptan
      Samsca, Jinarc
      Banned
      Click to expand
      Definition: Vaptans
    • Tolycaine
      Banned
      Click to expand
      Definition: Local anaesthetic
    • Torasemide
      Torem, Demadex
      Banned
      Click to expand
      Definition: Diuretic
    • Toremifene
      Fareston
      Banned
      Click to expand
      Definition: Oestrogen receptor modulator
    • Tramadol
      Zamadol, Zydol, Ryzolt, Ultram, Tramal
      Banned
      Click to expand
      Definition: Analgesic
    • Tramazoline
      Biciron, Ellatun, Rhinaspray, Rinogutt, Spray-Tish
      Banned
      Click to expand
      Definition: Sympathomimetic
    • Tranexamic Acid
      Amcacid, Amchafibrin, Amstat, Anvitoff, Carxamin, Ciclokapron, Emorhalt, Exacyl, Frenolyse, Hexapromin, Hexatron, Tranex, Tranexan, Transamin, Transamlon, Ugurol
      Conditionally Permitted
      Click to expand
      Definition: Anti-fibrinolytic
      Information:
      Tranexamic acid may be used in the treatment and prevention of bleeding disorders. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

      Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

      Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

    • Tranylcypromine
      Parnate, Jatrosom
      Banned
      Click to expand
      Definition: Mono-amine oxidase inhibitor
    • Trazodone
      Beneficat, Desyrel, Molipaxin
      Banned
      Click to expand
      Definition: Antidepressant
    • Trena
      Banned
      Click to expand
      Definition: Anabolic
    • Trenbolone
      Finaplix
      Banned
      Click to expand
      Definition: Anabolic
    • Trestolone
      Banned
      Click to expand
      Definition: Anabolic
    • Triamcinolone
      Aristocort, Cinolone, Delphi, Ipercortis, Kenacort, Kenalog, Ledercort, Triamcet, Volon
      Conditionally Permitted
      Click to expand
      Definition: Corticosteroid
      Information:
      Triamcinolone is used to treat a wide number of inflammatory diseases. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

      Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

      Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

    • Triamcinolone Acetonide
      Vetalog, Adcortyl
      Conditionally Permitted
      Click to expand
      Definition: Corticosteroid
      Information:
      Triamcinolone acetonide is an anti-inflammatory agent, used in the treatment of orthopaedic disease e.g. osteoarthritis. The detection time is estimated to be 168 hours (7 days) after intra-articular administration. Please remember: A detection time is not the same as a withdrawal time. The detection time is the approximate period of time for which a substance (or its metabolite) remains in a horse's system such that it can be detected by the laboratory. The withdrawal time for a substance adds a safety margin, chosen with professional judgment and discretion to allow for individual differences between horses such as size, metabolism, degree of fitness, recent illness or disease etc. You are advised to seek suitable advice from your treating veterinarian. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

      Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

      Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

    • Triamcinolone Hexacetonide
      Aristospan
      Conditionally Permitted
      Click to expand
      Definition: Corticosteroid
      Information:
      Triamcinolone hexacetonide is used in the treatment of inflammatory disease. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

      Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

      Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

    • Triamterene
      Dyrenium, Dytac
      Banned
      Click to expand
      Definition: Diuretic
    • Triazolam
      Apo-Triazo, Halcion, Hypam, Trilam
      Banned
      Click to expand
      Definition: Anxiolytic
    • Trichlormethiazide (formerly in Naquasome)
      Achletin, Anatran, Anistadin, Aponorin, Carvacron, Chlopolidine, Cretonin, Esmarin, Fluitran, Flutra, Intromene, Kubacron, Metahydrin, Naqua, Schebitran, Tachionin, Tolcasone, Triflumen
      Conditionally Permitted
      Click to expand
      Definition: Diuretic
      Information:
      Trichlormethiazide may be used in the control of hypotension and oedema. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

      Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

      Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

    • Triflumeprazine
      Stelazine
      Banned
      Click to expand
      Definition: Phenothiazene
    • Trifluoperazine
      Eskazinyl, Eskazine, Jatroneural, Modalina, Stelazine, Terfluzine, Trifluoperaz
      Banned
      Click to expand
      Definition: Antipsychotic
    • Trifluoromethylphenyl piperazine
      Legal X
      Banned
      Click to expand
      Definition: Psychoactive
    • Trifluperidol
      Psicoperidol, Triperidol
      Banned
      Click to expand
      Definition: Antipsychotic
    • Triflupromazine (Floupromazine)
      Psyquil, Siquil, Vesprin
      Banned
      Click to expand
      Definition: Antipsychotic
    • Trihexylphenidyl (Trihexyphenidyl)
      Broflex, Benzhexol
      Banned
      Click to expand
      Definition: Acetylcholine inhibitor
    • Trihexyphenidyl (Trihexylphenidyl)
      Broflex, Benzhexol
      Banned
      Click to expand
      Definition: Acetylcholine inhibitor
    • Trimecaine
      Trimecaine HCL
      Banned
      Click to expand
      Definition: Local anaesthetic
    • Trimeprazine
      Panectyl, Repeltin, Vallergan
      Banned
      Click to expand
      Definition: Antipruritic
    • Trimetazidine
      Vastarel
      Banned
      Click to expand
      Definition: Angina treatment
    • Trimipramine
      Surmontil, Stangyl
      Banned
      Click to expand
      Definition: Antidepressant
    • Tripamide
      Normonal
      Banned
      Click to expand
      Definition: Antihypertensive
    • Tripelennamine
      Azaron, PBZ, Pyribenzamine
      Conditionally Permitted
      Click to expand
      Definition: Antihistamine
      Information:
      Tripelennamine may be used in the control of allergies. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

      Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

      Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

    • Triprolidine
      Actifed, Sudafed
      Banned
      Click to expand
      Definition: Antihistamine
    • Trometamol
      Addex-THAM, Alcaphor, Basionic, Tham, Thamacetat, Thamesol, Trisaminol
      Conditionally Permitted
      Click to expand
      Definition: Organic Compound
      Information:
      Trometamol may be used in the treatment of metabolic acidosis. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

      Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

      Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

    • Tropicamide
      Conditionally Permitted
      Click to expand
      Definition: Anticholinergic
      Information:
      Tropicamide may be used to dilate the pupils during ocular examinations. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

      Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

      Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

    • Tuaminoheptane
      Armeen L-7, Heptamine, Heptedrine, Heptin, Rinofluimucil, Rinoflumil, Rineptil, Rineptyl, Tuamine
      Banned
      Click to expand
      Definition: Stimulant
    • Tulobuterol
      Hokunalin
      Banned
      Click to expand
      Definition: Bronchodilator
    • Tybamate
      Solacen
      Banned
      Click to expand
      Definition: Anxiolytic
    • Valdecoxib
      Bextra
      Banned
      Click to expand
      Definition: Pain relief
    • Valerenic acid
      Valerenic acid
      Conditionally Permitted
      Click to expand
      Definition: Sedative
      Information:
      Valerenic acid is a constituent of the essential oil of the valerian plant. It may be used as a mild sedative in horses and found in herbal preparations. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

      Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

      Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

    • Valnoctamide
      Axiquel, Nirvanil
      Banned
      Click to expand
      Definition: Sedative
    • Valproate
      Epilim, Orlept, Depacon, Depakene
      Banned
      Click to expand
      Definition: Anticonvulsant
    • Vanillyl Butyl Ether
      Black Horse Warming Liniment
      Banned
      Click to expand
      Definition: Chemical compound
    • Vardenafil
      Levitra, Vivanza
      Banned
      Click to expand
      Definition: Vasodilator
    • Vedaprofen
      Quadrisol
      Conditionally Permitted
      Click to expand
      Definition: Non-steroidal anti-inflammatory
      Information:
      Vedoprofen may be used to relieve pain and inflammation. A complete and timely submitted Medications Report Form submitted to NRHA required. Not permitted in the horse's system within 24 hours of competition.

      Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

      Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

    • Velagliflozin
      Senvelgo
      Conditionally Permitted
      Click to expand
      Definition: Anti-hyperglycaemic
      Information:
      Velagliflozin may be used in the treatment of equine metabolic syndrome. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

      Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

      Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

    • Venlafaxine
      Efexor
      Banned
      Click to expand
      Definition: Antidepressant
    • Venom - naturally derived and synthetic
      Banned
      Click to expand
      Definition: Muscarinic
    • Verapamil
      Cordilox, Zolvera, Verelan, Calan
      Banned
      Click to expand
      Definition: Anti-arrhythmic
    • Vilanterol
      Anoro Ellipta, Revinty Ellipta, Relvar Ellipta
      Conditionally Permitted
      Click to expand
      Definition: Bronchodilator
      Information:
      Vilanterol may be used in the treatment of respiratory diseases. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

      Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

      Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

    • Viloxazine
      Vivalan, Emovit
      Banned
      Click to expand
      Definition: Antidepressant
    • Warfarin
      Aldocumar, Athrombin, Coumadin, Coumadine, Marevan, Panwarfin, Sofarin, Waran, Warfarin, Warfilone
      Banned
      Click to expand
      Definition: Anticoagulant
    • Xipamide
      Diurexan, Aquaphor
      Banned
      Click to expand
      Definition: Diuretic
    • Xylazine
      Anased, Rompun, Sedaxylan, Sedazine, Xylamax, Xylazine
      Conditionally Permitted
      Click to expand
      Definition: Sedative
      Information:
      Xylazine may be used as a sedative and analgesic. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

      Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

      Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

    • Xylometazoline
      Otrivine
      Banned
      Click to expand
      Definition: Adrenergic
    • YK-11
      Banned
      Click to expand
      Definition: Anabolic
    • Yohimbine
      Yocon, Yocoral, Yohimbine, Yohimex
      Conditionally Permitted
      Click to expand
      Definition: Stimulant
      Information:
      Yohimbine may be used to reverse sedation. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

      Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

      Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

    • Zeranol
      Ralgro
      Banned
      Click to expand
      Definition: Oestrogen agonist
    • Ziconotide (Zicotinide)
      Prialt, SNX111
      Banned
      Click to expand
      Definition: Opiod analgesic
    • Zicotinide (Ziconotide)
      Prialt, SNX111
      Banned
      Click to expand
      Definition: Opiod analgesic
    • Zilpaterol
      Banned
      Click to expand
      Definition: Beta agonist/repartitioning agent
    • Zimeldine
      Normud, Zelmid
      Banned
      Click to expand
      Definition: Antidepressant
    • Zolazepam
      Telazol
      Conditionally Permitted
      Click to expand
      Definition: Sedative
      Information:
      Zolazepam is used as a sedative in general anaesthesia. A complete and timely submitted Medications Report Form submitted to NRHA required. Not permitted in the horse's system within 24 hours of competition.

      Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

      Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

    • Zoledronate
      Banned
      Click to expand
      Definition: Bone metabolism agent
    • Zolpidem
      Stilnoct, Hypnogen, Ambien
      Banned
      Click to expand
      Definition: Hypnotic
    • Zomepirac
      Zomax
      Banned
      Click to expand
      Definition: Non-steroidal anti-inflammatory drug
    • Zopiclone
      Vivalan, Emovit
      Banned
      Click to expand
      Definition: Hypnotic
    • Zuclopenthixol
      Clopixol, Cisordinol
      Banned
      Click to expand
      Definition: Antipsychotic
    • Δ1-Testosterone
      Banned
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      Definition: Anabolic
    • Apoquel (oclacitinib)
      Permitted
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