Cocaine is a powerful stimulant drug that comes from the leaves of the South American coca plant.
Taking it makes people feel energetic and powerful at first, but then depressed, edgy and needing more. Cocaine is a white powder that people either snort or dissolve and inject with a needle. Crack is a form of cocaine that's been chemically altered, and crystallized, so it can be smoked. Cocaine, at first, makes people feel energetic and powerful. Cocaine and crack are among the most addictive drugs out there.