Used primarily in the treatment of hypertension (high blood pressure), it helps lower blood pressure by blocking the action of angiotensin II, a substance that narrows blood vessels. This effect relaxes blood vessels, improving blood flow and reducing the workload on the heart. It is also used in patients with heart failure to help improve survival and reduce hospitalizations. Due to its long-lasting action, it is typically taken once daily, offering consistent blood pressure control throughout the day.