title: Methylphenidate (ritalin) abuse and methadone maintenance.
mesh_terms: D000328:Adult; D000661:Amphetamine; D001532:Atropa belladonna; D001463:Barbiturates; D003975:Diazepam; D005260:Female; D006556:Heroin Dependence / Q000188:drug therapy*; D006801:Humans; D008297:Male; D008691:Methadone / Q000627:therapeutic use*; D008774:Methylphenidate; D010946:Plants, Medicinal; D010947:Plants, Toxic; D019966:Substance-Related Disorders / Q000150:complications*; D014861:Washington
chemical_list: D001463:Barbiturates; D008774:Methylphenidate; D000661:Amphetamine; D003975:Diazepam; D008691:Methadone