Administration, CutaneousNitroglycerinSkin AbsorptionSelegilineFentanylTransdermal PatchNitro CompoundsVasodilator AgentsDrug ToleranceHistatinsNitroblue TetrazoliumAllophanate HydrolaseNitroreductasesAdministration, SublingualVasodilationAllantoinDrug Delivery SystemsCarbon-Nitrogen LigasesPhonophoresisNeedlesSkinIontophoresisNicorandilPharmaceutical VehiclesCoronary VesselsDouble-Blind MethodEstrogen Replacement TherapyChemistry, PharmaceuticalAngina Pectoris