Comparison of hydroxyzine-meperidine and promethazine-meperidine for analgesia during labor.
D000773:Anesthesia, Obstetrical; D001794:Blood Pressure / Q000187:drug effects; D002986:Clinical Trials as Topic; D005260:Female; D005333:Fetus / Q000187:drug effects; D006801:Humans; D006919:Hydroxyzine / Q000494:pharmacology / Q000627:therapeutic use*; D007231:Infant, Newborn; D007743:Labor, Obstetric / Q000187:drug effects; D008614:Meperidine / Q000494:pharmacology / Q000627:therapeutic use*; D011247:Pregnancy; D011398:Promethazine / Q000494:pharmacology / Q000627:therapeutic use
D006919:Hydroxyzine; D008614:Meperidine; D011398:Promethazine