EphedrinePhosphorusEphedraPhosphorus, DietaryPhenylpropanolamineAnesthesia, ObstetricalAnesthesia, SpinalPhosphorus CompoundsPseudoephedrineEphedra sinicaHypotensionSympathomimeticsMetaraminolCesarean SectionRitodrineDoping in SportsPhenylephrineVasoconstrictor AgentsPhosphatesPhosphorus Metabolism DisordersCentral Nervous System StimulantsAnesthesia, Epidural6-Phytase