title: Epidural hydromorphone: a double-blind comparison with intramuscular hydromorphone for postcesarean section analgesia.
mesh_terms: D002585:Cesarean Section; D002986:Clinical Trials as Topic; D004311:Double-Blind Method; D005260:Female; D006801:Humans; D004091:Hydromorphone / Q000008:administration & dosage / Q000627:therapeutic use*; D007268:Injections, Epidural; D007273:Injections, Intramuscular; D010149:Postoperative Pain / Q000188:drug therapy*; D011247:Pregnancy; D011446:Prospective Studies; D011897:Random Allocation
chemical_list: D004091:Hydromorphone