title: [Postoperative pain relief with various epidural narcotics: demerol, butorphanol, nalbuphine, and morphine].
mesh_terms: D000328:Adult; D002077:Butorphanol / Q000627:therapeutic use; D002986:Clinical Trials as Topic; D004311:Double-Blind Method; D005260:Female; D006801:Humans; D007268:Injections, Epidural; D008297:Male; D008614:Meperidine / Q000627:therapeutic use; D008875:Middle Aged; D009020:Morphine / Q000627:therapeutic use; D009266:Nalbuphine / Q000627:therapeutic use; D009292:Narcotic Antagonists / Q000008:administration & dosage / Q000627:therapeutic use*; D009294:Narcotics / Q000008:administration & dosage / Q000627:therapeutic use*; D010149:Postoperative Pain / Q000188:drug therapy*
chemical_list: D009292:Narcotic Antagonists; D009294:Narcotics; D009020:Morphine; D008614:Meperidine; D009266:Nalbuphine; D002077:Butorphanol