SulfonesPurinesCanadaPhosphodiesterase 5 InhibitorsPiperazinesPhosphodiesterase InhibitorsCyclic Nucleotide Phosphodiesterases, Type 5Erectile Dysfunction3',5'-Cyclic-GMP PhosphodiesterasesVasodilator AgentsPenile ErectionUmbilical CordOvumHypertension, PulmonaryBufo arenarumBeesSugar AlcoholsCarbolinesImpotence, VasculogenicCyclic GMPSea UrchinsPenisOntarioPetrolatumSperm-Ovum InteractionsAdministration, OralPhosphoric Diester HydrolasesPyrimidinonesTriazinesBritish ColumbiaApitherapyPulmonary ArteryAlbertaFertilizationPriapismQuebecCarbohydrate SequenceHoneyFatty AcidsFlavoring AgentsStichopusDouble-Blind MethodCross-Over StudiesMonosaccharidesTreatment OutcomeSpermatozoaAcrosome ReactionAcrosomeManitobaPolysaccharidesNitric OxideClitorisCyclic GMP-Dependent Protein KinasesHypertrophy, Right VentricularPulmonary Wedge PressureVascular ResistanceCandyCarbohydrate ConformationTime FactorsDihydroergocristineEchinodermataLubricantsDose-Response Relationship, DrugVitelline MembraneIloprostNova ScotiaPapaverineDrug Therapy, CombinationHemodynamicsNorthwest TerritoriesAntihypertensive AgentsEjaculationBlood PressureLubricationWharton JellyInsect ProteinsOviductsSaskatchewanNunavutScyphozoaEgg ProteinsEndocardial CushionsAlprostadilYukon TerritoryMedicine, KampoEpimediumNewfoundland and LabradorCyclic Nucleotide Phosphodiesterases, Type 2Fucose1-NaphthylamineDrug InteractionsMolecular Sequence DataGuanylate CyclaseChromatography, High Pressure LiquidSea CucumbersCacaoPentylenetetrazoleCoitusMesenchymal Stromal CellsPulmonary Circulation