The use of levallorphan with pethidine in obstetrics.
D000698:Analgesia; D000758:Anesthesia; D000760:Anesthesia and Analgesia; D000773:Anesthesia, Obstetrical; D000776:Anesthesiology; D007977:Levallorphan; D008614:Meperidine; D009020:Morphine / Q000037:antagonists & inhibitors*; D009774:Obstetrics; D059408:Pain Management
D007977:Levallorphan; D009020:Morphine; D008614:Meperidine
ANESTHESIA, OBSTETRICAL; MEPERIDINE/anesthesia and analgesia; MORPHINE/antagonists