Cocaine belongs to a class of drugs known as stimulants, which give a fleeting feeling of energy.
It can make the user feel less hungry and more powerful, or self-confident. Later, the user feels depressed, edgy, and craving more as the drug wears off. Crack is a form of cocaine that has been chemically changed so that it can be smoked. Cocaine and crack are highly addictive. When crack is smoked, the drug rushes into the person's body and is in the brain in seconds.