title: Double-blind comparison of butorphanol and meperidine in the treatment of post-surgical pain.
mesh_terms: D002077:Butorphanol / Q000009:adverse effects / Q000627:therapeutic use*; D002986:Clinical Trials as Topic; D004311:Double-Blind Method; D006801:Humans; D008614:Meperidine / Q000009:adverse effects / Q000627:therapeutic use*; D009019:Morphinans / Q000627:therapeutic use*; D010149:Postoperative Pain / Q000188:drug therapy*
chemical_list: D009019:Morphinans; D008614:Meperidine; D002077:Butorphanol