Sulfonylurea CompoundsSulfonylurea ReceptorsGlyburideTolbutamideReceptors, DrugPotassium Channels, Inwardly RectifyingGliclazideGlipizideCarbutamideHypoglycemic AgentsTolazamideChlorpropamideATP-Binding Cassette TransportersPotassium ChannelsMetforminAdamantaneKATP ChannelsPinacidilDiazoxideIslamThioamidesAdenosine TriphosphateDiabetes Mellitus, Type 2Drug SubstitutionGuanidinesCyclohexanesIslets of LangerhansCromakalimPotassium Channel BlockersBlood GlucoseHypoglycemiaHemoglobin A, GlycosylatedInsulinPatch-Clamp TechniquesMembrane PotentialsDrug Therapy, CombinationThiazolidinedionesPyrazinesAdenosine DiphosphateDose-Response Relationship, DrugIon Channel GatingXenopus laevisDrug InteractionsElectrophysiologyOocytesFastingDiabetes MellitusCell LineCalciumDouble-Blind MethodTime FactorsAnalysis of VarianceTransfectionKineticsTreatment OutcomeCells, Cultured