Ce contenu est une compilation d'articles de l'encyclopédie libre Wikipedia. Cocaine is a crystalline tropane alkaloid that is obtained from the leaves of the coca plant. Cocaine is a powerful, addictive nervous system stimulant that increases alertness, feelings of well-being and euphoria, energy and motor activity, feelings of competence and sexuality. Anxiety, paranoia and restlessness are also frequent. With excessive dosage, tremors, convulsions and increased body temperature are observed. Its effects can last from 15-30 minutes to an hour, depending on the route of administration. Learn more about cocaine, its effects on human body, its types and cocaine dependency in the following pages.