EphedrineEphedraPhenylpropanolamineAnesthesia, ObstetricalAnesthesia, SpinalPseudoephedrineEphedra sinicaHypotensionSympathomimeticsMetaraminolCesarean SectionRitodrinePhenylephrineDopamine AgonistsDoping in SportsVasoconstrictor AgentsAdrenergic alpha-AgonistsCentral Nervous System StimulantsAnesthesia, EpiduralGABA Agonists