Valsartan is an angiotensin II receptor blocker (ARB) commonly prescribed to manage hypertension and heart failure. At a dosage of 160 mg, Valsartan exerts its therapeutic effects by blocking the action of angiotensin II, a hormone that constricts blood vessels and raises blood pressure. By inhibiting the angiotensin II receptor, Valsartan helps dilate blood vessels, reduce blood pressure, and alleviate the workload on the heart.