NitroprussideFerricyanidesNitric Oxide DonorsVasodilator AgentsNitric OxideSodiumVasodilationAcetylcholineCyclic GMPDrug PackagingForearmHypotension, ControlledNG-Nitroarginine Methyl EsterEndothelium, Vascularomega-N-MethylarginineNitric Oxide SynthaseVasoconstrictor AgentsGuanylate CyclaseS-Nitroso-N-AcetylpenicillamineArginineMuscle RelaxationPhenylephrineSodium ChannelsPenicillamineNitroarginineRegional Blood FlowEnzyme InhibitorsBlood PressureOxadiazolesTrimethaphanMolsidomineDose-Response Relationship, DrugVasoconstrictionBradykininVascular ResistanceAorta, ThoracicMuscle, Smooth, VascularMethylene BlueDrug ContaminationPlethysmographySodium NitriteArteriolesNorepinephrineNitroglycerinDrug StoragePurinonesRats, Sprague-DawleyIontophoresisNitroso CompoundsRats, WistarSodium, DietaryCromakalimMicrocirculationBaroreflexVasomotor SystemMuscle ContractionMesenteric ArteriesSodium ChlorideHemodynamics15-Hydroxy-11 alpha,9 alpha-(epoxymethano)prosta-5,13-dienoic AcidArteriesQuinoxalinesAortaHeart RateInfusions, Intra-ArterialCyclic GMP-Dependent Protein KinasesRabbitsSyringesHypertensionCoronary VesselsDogsDibutyryl Cyclic GMPLaser-Doppler FlowmetryCyanidesS-NitrosoglutathioneMuscle, SmoothNitric Oxide Synthase Type IIIBiological FactorsSwineHydroxocobalaminPotassium ChlorideAmino Acid OxidoreductasesRats, Inbred WKYTime FactorsIndomethacinSympathetic Nervous SystemBenzopyransPotassiumNitrogen OxidesApaminHypotensionMuscle TonusHydrazinesVerapamilSodium CyanideNitritesHyperemiaCells, CulturedDiethylaminesPenis