title: Pethidine, pentazocine and perphenazine mixture for the control of pain in labour.
mesh_terms: D000773:Anesthesia, Obstetrical; D005260:Female; D006801:Humans; D007743:Labor, Obstetric; D008614:Meperidine; D010423:Pentazocine; D010546:Perphenazine; D011247:Pregnancy
chemical_list: D008614:Meperidine; D010546:Perphenazine; D010423:Pentazocine