Drugs that have an effect on the central nervous system, ie they increase mental and/or physical alertness.

Artificially produced male hormones mimicking testosterone. They promote muscle and bone growth, and reduce recovery time. Often used by power athletes, eg sprinters.

Drugs that are used to steady nerves by controlling heart rate. They have a calming and relaxing effect.

Defined by World Anti-Doping Agency (WADA) as the misuse of techniques and/or substances to increase one’s red blood cell count.

Drugs that remove fluid from the body, elevating the rate of bodily urine excretion.

Drugs that can be used to reduce the feeling of pain.