PhentolamineAdrenergic alpha-AntagonistsInjections, IntravenousPropranololReceptors, Adrenergic, alphaNorepinephrineAdministration, IntravenousReceptors, AdrenergicAdministration, OralPhenoxybenzamineEpinephrineSympatholyticsPrazosinYohimbineAtropineAdrenergic alpha-AgonistsClonidineDogsDose-Response Relationship, DrugSympathetic Nervous SystemInfusions, IntravenousElectric StimulationMethysergideGuanethidineReserpineSympathomimeticsIsoproterenolBlood PressureAdrenergic beta-AntagonistsMuscle ContractionHexamethonium CompoundsRats, Sprague-DawleyGuinea PigsCatecholaminesBiological AvailabilityHeart RateAdrenergic AntagonistsRats, Inbred StrainsPhenylephrineAutonomic AgentsTime FactorsRats, WistarRabbitsHalf-LifeDrug InteractionsBretylium CompoundsTissue DistributionInfusions, ParenteralAdrenergic alpha-2 Receptor AntagonistsTyramineDihydroergotoxineMuscle, SmoothCatsRegional Blood FlowAdrenergic alpha-1 Receptor AntagonistsPapaverineErgoloid MesylatesOxymetazolineVas DeferensMoxisylyteMethoxamineMetabolic Clearance RateReceptors, Adrenergic, betaDibenzylchlorethamineVasoconstrictionHemodynamicsInjections, IntraventricularAnesthesiaDrug Administration RoutesArea Under CurveDesipramineHydroxydopaminesAutonomic Fibers, PostganglionicDrug Administration ScheduleErgotamineTolazolineStimulation, ChemicalLiverInjectionsVascular ResistanceDibenzazepinesButoxamineParasympathetic Nervous SystemSerotoninHexamethoniumDioxanesHeartAmino AlcoholsVagus NerveIdazoxanNicergolineOctopamineParasympatholyticsDisease Models, AnimalAlprenololCocaineAcetylcholineMetaraminolPenile ErectionVagotomy