title: Narcotic antagonists: naltrexone progress report: introduction.
mesh_terms: D002986:Clinical Trials as Topic; D004341:Drug Evaluation; D006556:Heroin Dependence / Q000534:rehabilitation*; D006801:Humans; D008297:Male; D009270:Naloxone / Q000031:analogs & derivatives*; D009271:Naltrexone / Q000009:adverse effects / Q000627:therapeutic use*; D012106:Research
chemical_list: D009270:Naloxone; D009271:Naltrexone