Cocaine

Cocaine derives from the leaves of the South American cocoa plant. Chopped finely and inhaled, usually through a straw or banknote, effects are experienced almost immediately. Stimulation of the central nervous system, enhanced self confidence, exhilaration and increased stamina can last for up to an hour. Possible hazards are damage to nasal membranes, irregular heart rate, reduction in libido and psychosis and other mental health problems.