(CSA) Controlled Substance Act
The Controlled Substances Act (CSA) places drugs in one or more of five categories (or Schedules) based on eight criteria including the drug's abuse potential and accepted medical use. Alcohol and tobacco are not included as CSA Schedule drugs. Schedule II, III, IV, and V drugs have accepted medical uses in the United States while Schedule I drugs do not. Schedule I and II drugs have the highest potential for abuse while Schedule IV and V drugs have the lease abuse potential. Schedule I drugs include heroin, LSD, methamphetamine, mescaline, ecstasy, PMA, and marijuana.