DiltiazemVerapamilCalcium Channel BlockersBenzazepinesNifedipineNicardipineP-GlycoproteinCalciumNitrendipineFlunarizineCalcium Channels, L-TypeDrug InteractionsDogsDose-Response Relationship, DrugMibefradilCinnarizineBepridilGallopamilDihydropyridinesCalcium ChannelsDrug ResistanceCalcium ChlorideAnti-Arrhythmia AgentsIsradipineVasodilator AgentsGastric LavageGuinea PigsNimodipineMuscle ContractionDelayed-Action PreparationsHeart RateMyocardial ContractionQuinidineBlood Pressure