People entered in this category have either:

1. Been suspended by a sporting body (an international governing body, a national federation, or a professional league) for illegal performance-enhancing drug, and/or banned drug, use
2. Publicly admitted such use
3. Been found to have taken illegal performance-enhancing drugs by a court of law
4. Been suspended by a sporting body for failure to submit to mandatory drug testing

See also: List of doping cases in sport.