Bepridil is a calcium channel blocker and also inhibits Na+/Ca2+ exchange (NCX) sodium channels and cardiac sarcolemmal KATP channels.(In Vitro):Bepridil hydrochloride is a calcium channel blocker, with antianginal activity.(In Vivo):Bepridil hydrochloride (21 mg/kg) reduces heart rate and mean arterial pressure, decreases the mean coronary vascular resistance and increases stroke volume in rats.