List of doping cases in athletics
The use of performance-enhancing drugs (doping in sport) is prohibited within the sport of athletics. Athletes who are found to have used such banned substances, whether through a positive drugs test, the biological passport system, an investigation or public admission, may receive a competition ban for a length of time which reflects the severity of the infraction.
Source: Wikipedia — List of doping cases in athletics (CC BY-SA 4.0)