title: Control of postoperative pain: a comparison of the efficacy and safety of pentazocine, methotrimeprazine, meperidine, and a placebo.
mesh_terms: D002986:Clinical Trials as Topic; D005260:Female; D006801:Humans; D008297:Male; D008614:Meperidine / Q000627:therapeutic use*; D008728:Methotrimeprazine / Q000627:therapeutic use*; D010146:Pain / Q000188:drug therapy*; D010423:Pentazocine / Q000627:therapeutic use*; D010919:Placebos; D011182:Postoperative Care
chemical_list: D010919:Placebos; D008614:Meperidine; D008728:Methotrimeprazine; D010423:Pentazocine