This section classifies drugs, medications, and foreign substances. The names, trade names, classifications, and if applicable a reference to the section containing the permitted threshold are listed alphabetically in WAC 260-70-685. The penalties for violation of this section are in WAC 260-84-110.

(1) Class 1

Class 1 drugs are stimulant and depressant drugs that have the highest potential to affect the performance of a horse, and have no generally accepted medical use. Many of these agents are Drug Enforcement Agency (DEA) Schedule II substances. These include the following drugs and their metabolites: Opiates, opium derivatives, synthetic opioids and psychoactive drugs, amphetamines and amphetamine-like drugs as well as related drugs, including but not limited to apomorphine, nikethamide, mazindol, pemoline, and pentylenetetrazol.

(2) Class 2

Class 2 drugs are drugs/medication/foreign substances that have a high potential to affect the performance of a horse, but less of a potential than class 1 drugs. Class 2 drugs are either not generally accepted as therapeutic agents in racing horses, or are therapeutic agents that have a high potential for abuse.

(3) Class 3

Class 3 drugs are drugs/medication/foreign substances that may or may not have generally accepted medical use in the racing horse, but the pharmacology of which suggests less potential to affect performance than class 2 drugs.

(4) Class 4

Class 4 drugs include therapeutic drugs/medications/foreign substances that would be expected to have less potential to affect the performance of a racing horse than class 3 drugs.

(5) Class 5

Class 5 drugs include those therapeutic medications for which concentration limits have generally been established by racing jurisdictions as well as certain miscellaneous agents and other medications. Included are specifically agents that have very localized actions only, such as anti-ulcer drugs and certain anti-allergic drugs. The anticoagulant drugs are also included.

(6) Nonclassified substances

Nonclassified substances are considered to have no effect on the physiology of a horse, except to improve nutrition or treat or prevent infections or parasite infestations. These substances normally include antimicrobials, antiparasitic drugs, and nutrients such as vitamins.

(7) Substances denoted with a "*" are medications that are currently being studied at a national level to establish thresholds, currently have an established threshold, or could be considered an environmental contaminate based on the level reported. In the instance of a positive reported for these medications the stewards may use this as mitigating circumstances, taking into account the level reported, when ruling on the violation.