Access the online 2020 USEF Drugs & Medications Guidelines which includes “Guidelines for How Long Drugs Remain Detectable” at https://www.usef.org/forms-pubs/2Zp2C_YKs4s/drugs-medications-guidelines

The FEI Equine Prohibited Substances List is available at http://www.fei.org/fei/cleansport/ad-h/prohibited-list