title: Naltrexone: the clinical investigator's dilemma.
mesh_terms: D000293:Adolescent; D000328:Adult; D006556:Heroin Dependence / Q000534:rehabilitation* / Q000652:urine; D006801:Humans; D008297:Male; D008691:Methadone / Q000627:therapeutic use; D009270:Naloxone / Q000031:analogs & derivatives*; D009271:Naltrexone / Q000627:therapeutic use*; D010352:Patient Dropouts; D012107:Research Design; D012917:Social Adjustment; D014481:United States
chemical_list: D009270:Naloxone; D009271:Naltrexone; D008691:Methadone