title: Usefulness of propoxyphene napsylate for maintenance treatment of narcotic addiction.
mesh_terms: D000328:Adult; D002986:Clinical Trials as Topic; D011431:Dextropropoxyphene / Q000031:analogs & derivatives* / Q000627:therapeutic use*; D004311:Double-Blind Method; D006801:Humans; D008691:Methadone / Q000627:therapeutic use; D008875:Middle Aged; D009293:Opioid-Related Disorders / Q000188:drug therapy* / Q000534:rehabilitation; D013997:Time Factors
chemical_list: D011431:Dextropropoxyphene; D008691:Methadone