There are many types of sporting drugs. Peptide hormones, analogues and anabolic agents all increase the size of muscles or help growth.
Stimulants speed up parts of the body and the brain to improve reactions and stop you getting tired. Narcotic analgesics also stop the effects of tiredness by reducing pain. Beta blockers calm you down and slow your heart down.
Diuretics allow you to lose weight by increasing the amount of urine you pass.