Cocaine is habit-forming. It is potentially dangerous when indulged in to excess.

        If rats or monkeys are hooked up to an intravenous source of heroin, they will happily self-administer the drug indefinitely; but they still find time to sleep and eat.

         If rats or monkeys can freely self-administer cocaine, however, they will do virtually nothing else. Captive animals continue to press their drug-delivery lever for as long as they are physically capable of doing so. Their fate is similar to an intracranially self-stimulating laboratory rodent. Within weeks, if not days, they will lose a substantial portion of their body weight - up to 40%. Within a month, they will be dead.

Urinary Detection Times