Most Used Performance-Enhancing Drugs

Stanozolol 1 of 11

Also known as Winstrol, this anabolic steroid is very popular amongst athletes across the board. It is known to increase muscle size and strength, while having no water retention or negative effects on cardiorespiratory endurance. This has caused the most failed drug tests of any drug in the Olympic Games since drug testing started in 1968. This is the drug that Ben Johnson was found to have taken when he was stripped of his Gold Medal in the 1988 Games.