NitroglycerinTabletsTablets, Enteric-CoatedVasodilator AgentsDrug ToleranceChemistry, PharmaceuticalExcipientsAdministration, SublingualAdministration, CutaneousDrug CompoundingDelayed-Action PreparationsVasodilationTechnology, PharmaceuticalNicorandilMethylcelluloseCoronary VesselsPowdersSolubilityDogsPentaerythritol TetranitrateAdministration, OralBlood PressureHardnessAldehyde DehydrogenaseTilt-Table TestSpasmAngina PectorisOintmentsPeripheral Nervous System AgentsCoronary CirculationHeart RateDouble-Blind MethodFerricyanidesHemodynamicsVascular ResistanceNitric OxideDiltiazemLubricantsCross-Over StudiesBrachial ArteryCoronary VasospasmDosage FormsIsosorbide DinitrateTherapeutic EquivalencyCapsulesAcetylcholineEndothelium, VascularNitric Oxide DonorsCellulosePapaverinePovidoneNitratesCyclic GMPDrug StabilityBiological AvailabilitySyncope, VasovagalNitroprussideHardness TestsAdministration, BuccalMuscle RelaxationInfusions, IntravenousGuanylate CyclaseMethylene BlueInjections, Intra-ArterialRegional Blood FlowTime FactorsDose-Response Relationship, DrugScorpion StingsCoronary DiseaseFissure in AnoCyanamideCompressive StrengthRadial ArteryHydralazineBlood Flow VelocityCoronary AngiographyCarboxymethylcellulose SodiumVasoconstrictionS-NitrosothiolsAortaSuspensionsMuscle, Smooth, Vascular