title: The adjuvant use of epidural butorphanol in caesarean section.
mesh_terms: D000328:Adult; D000698:Analgesia; D000767:Anesthesia, Epidural; D000773:Anesthesia, Obstetrical / Q000379:methods*; D002077:Butorphanol / Q000008:administration & dosage*; D002585:Cesarean Section; D005260:Female; D006801:Humans; D009019:Morphinans / Q000008:administration & dosage*; D011247:Pregnancy; D012119:Respiration / Q000187:drug effects
chemical_list: D009019:Morphinans; D002077:Butorphanol