Cocaine
Key facts Cocaine is an illegal drug. Cocaine use can cause unwanted side effects, such as psychosis and dependence. A cocaine overdose can be fatal. If you want to stop using cocaine, speak to your doctor. What is cocaine? Cocaine is an illegal, highly addictive drug made from the leaves of the South American coca bush. It is a central nervous system stimulant, which causes high levels of dopamine to be released. Dopamine is a brain chemical associated with pleasure and reward. Cocaine is a white powder with a bitter, numbing taste. It is typically snorted through the nose, but it can also be:
