Postoperative pain.
D000700:Analgesics / Q000008:administration & dosage*; D006801:Humans; D007263:Infusions, Parenteral; D007273:Injections, Intramuscular; D008614:Meperidine / Q000008:administration & dosage*; D010149:Postoperative Pain / Q000517:prevention & control*
D000700:Analgesics; D008614:Meperidine