Cocaine is a stimulant drug with powerful but short-lived effects. It originates from the leaves of the coca plant, native to South America.
The desired effects of cocaine use include feelings of increased confidence, energy and alertness, as well as a decrease in tiredness, appetite and sleep. Unwanted effects can include fear, irritation, anxiety, paranoia, impaired judgment and disturbed sleep.
Cocaine is a white powder. Crack cocaine is a form of cocaine that has been processed to make a white/off white rock crystal, about the size of a raisin.
Cocaine powder is typically divided into lines and then snorted up the nose. Some people choose to inject it.