MeperidineShiveringAnalgesics, OpioidAdjuvants, AnesthesiaAnalgesia, ObstetricalPromethazineHydroxyzineDihydroergotamineAlfentanilAnalgesia, EpiduralConscious SedationPreanesthetic MedicationFentanylChloral HydrateCesarean SectionAnalgesia, Patient-ControlledButorphanolDextropropoxypheneKetorolac TromethamineMorphineSufentanilAnesthesia, SpinalKetorolacSerotonin SyndromeSkin TemperatureAnalgesics, Non-NarcoticAnesthesia, DentalTolmetinAnesthetics, LocalImage Processing, Computer-AssistedContraceptives, OralPharmaceutical PreparationsContraceptives, PostcoitalGenomic Imprinting