AZELNIDIPINE belongs to a class of anti-hypertensive drugs primarily used to treat hypertension (high blood pressure). Hypertension (high blood pressure) is a lifelong or chronic condition in which the force exerted by the blood against the artery walls becomes high. The higher the blood pressure, the harder the heart pumps blood. Azelnidipine is a calcium channel blocker that acts by relaxing the blood vessels. This reduces the workload on the heart and makes the heart more efficient at pumping blood throughout the body. Thus, it helps to lower high blood pressure, reducing the chances of heart attack or stroke.