title: Method for self-administering methadone by the heroin addict.
mesh_terms: D000284:Administration, Oral; D000328:Adult; D003216:Conditioning, Operant; D005069:Evaluation Studies as Topic; D005260:Female; D006556:Heroin Dependence / Q000628:therapy*; D006801:Humans; D008297:Male; D008691:Methadone / Q000008:administration & dosage* / Q000627:therapeutic use; D008722:Methods; D012055:Reinforcement Schedule; D012201:Reward; D013375:Substance Withdrawal Syndrome / Q000517:prevention & control
chemical_list: D008691:Methadone