Any drug whose production, possession, importation, and distribution is
strictly regulated or outlawed. These include depressants (such as
barbiturates), hallucinogens (LSD, mescaline, and peyote), marijuana, opiates
(heroin, morphine, and opium), and stimulants (amphetamines and cocaine). The
substances are listed in five categories, or schedules, according to their
characteristics and the type and degree of regulation is determined by the
category the particular substance is in.