The World Anti-Doping Agency (WADA) publishes the Prohibited List — an annually updated list of substances and methods banned in sport, adopted by most national and international sport federations. Understanding how it works matters even if you’d never knowingly dope, because unintentional violations happen more often than people expect.
How the list is organized
Broad categories include anabolic agents, hormones and growth factors, diuretics and masking agents, stimulants, and specific methods like blood doping. Some substances are banned at all times (in and out of competition); others, like most stimulants, are only prohibited during competition. Certain common medications — some ADHD medications, some asthma inhalers, and some allergy or cold remedies — contain substances on the list, which is why checking before taking anything new matters, not just avoiding obviously suspicious products.
Where unintentional violations come from
- Contaminated supplements — the most common source. See our supplements guide for why label accuracy can’t be assumed.
- Prescribed medications taken without checking their status first.
- Over-the-counter products — cold and allergy remedies are a frequent, easy-to-overlook source of prohibited stimulants.
Under the strict liability principle that anti-doping rules operate on, athletes are generally held responsible for what’s found in their system regardless of intent — “I didn’t know it was in there” is not typically a defense, which is exactly why prevention matters more than explanation after the fact.
How to protect yourself
- Check before you take anything new — national anti-doping agencies run free medication-lookup tools (such as Global DRO) where you can check a specific product by name.
- Choose third-party tested supplements where possible (NSF Certified for Sport, Informed Sport), and understand that even these reduce risk rather than eliminate it entirely.
- Know the TUE process. If you have a genuine medical need for a prohibited substance, a Therapeutic Use Exemption can be requested in advance through your sport’s governing body — this is the correct route, not simply taking the medication and hoping it isn’t tested.
- Ask before assuming. If a clinician prescribes something and you compete under an anti-doping code, tell them, and verify the medication’s status yourself as well.
This page is educational and general in nature, summarizing widely available anti-doping information. It is not a substitute for checking your specific sport’s governing body rules or a current medication-lookup tool — see our medical disclaimer.