Benidipine hydrochloride is primarily used as a calcium channel blocker in the treatment of hypertension. It works by relaxing the blood vessels, which helps to lower blood pressure and improve blood flow. This makes it effective in managing high blood pressure and reducing the risk of cardiovascular events such as strokes and heart attacks. Additionally, it is sometimes used in the treatment of angina, as it helps to decrease the workload on the heart by dilating coronary arteries and improving oxygen supply to the heart muscle. Its long-lasting effect allows for once-daily dosing, enhancing patient compliance.