title: An introduction to drug dependence.
mesh_terms: D000437:Alcoholism / Q000453:epidemiology; D000553:Ambulatory Care; D000662:Amphetamines; D001348:Aversive Therapy; D001463:Barbiturates; D002188:Cannabis; D005500:Follow-Up Studies; D006213:Hallucinogens; D003932:Heroin / Q000627:therapeutic use; D006556:Heroin Dependence / Q000453:epidemiology / Q000534:rehabilitation; D006801:Humans; D007880:Legislation, Drug; D008691:Methadone / Q000627:therapeutic use; D012907:Smoking / Q000453:epidemiology; D019966:Substance-Related Disorders / Q000453:epidemiology* / Q000534:rehabilitation; D006113:United Kingdom
chemical_list: D000662:Amphetamines; D001463:Barbiturates; D006213:Hallucinogens; D003932:Heroin; D008691:Methadone