Drug use and abuse.
D001284:Atrophy / Q000139:chemically induced; D001463:Barbiturates; D001921:Brain / Q000187:drug effects; D002188:Cannabis / Q000009:adverse effects; D004305:Dose-Response Relationship, Drug; D004526:Efficiency / Q000187:drug effects; D006213:Hallucinogens; D006801:Humans; D007111:Immunity, Cellular / Q000187:drug effects; D008691:Methadone / Q000627:therapeutic use; D008694:Methamphetamine; D009292:Narcotic Antagonists / Q000627:therapeutic use; D009892:Opium; D019966:Substance-Related Disorders / Q000453:epidemiology / Q000517:prevention & control / Q000628:therapy; D013808:Therapeutic Community; D014481:United States
D001463:Barbiturates; D006213:Hallucinogens; D009292:Narcotic Antagonists; D008694:Methamphetamine; D009892:Opium; D008691:Methadone