title: Naltrexone in methadone maintenance patients electing to become "drug free".
mesh_terms: D000328:Adult; D002986:Clinical Trials as Topic; D004305:Dose-Response Relationship, Drug; D004334:Drug Administration Schedule; D005500:Follow-Up Studies; D006556:Heroin Dependence / Q000534:rehabilitation*; D006801:Humans; D008297:Male; D008691:Methadone / Q000008:administration & dosage / Q000627:therapeutic use*; D009270:Naloxone / Q000031:analogs & derivatives*; D009271:Naltrexone / Q000008:administration & dosage / Q000009:adverse effects / Q000627:therapeutic use*; D010352:Patient Dropouts; D012107:Research Design
chemical_list: D009270:Naloxone; D009271:Naltrexone; D008691:Methadone