title: Effects of meperidine and promethazine during labor.
mesh_terms: D001794:Blood Pressure / Q000187:drug effects; D002319:Cardiovascular System / Q000187:drug effects*; D004338:Drug Combinations; D004562:Electrocardiography; D005260:Female; D005318:Fetal Heart / Q000187:drug effects; D005333:Fetus / Q000187:drug effects*; D006339:Heart Rate / Q000187:drug effects; D006801:Humans; D007743:Labor, Obstetric / Q000187:drug effects*; D008431:Maternal-Fetal Exchange / Q000187:drug effects; D008614:Meperidine / Q000494:pharmacology*; D011247:Pregnancy; D011398:Promethazine / Q000494:pharmacology*; D013997:Time Factors; D014599:Uterus / Q000187:drug effects
chemical_list: D004338:Drug Combinations; D008614:Meperidine; D011398:Promethazine