Used primarily in the management of hypertension (high blood pressure). It works by blocking the action of angiotensin II, a substance that causes blood vessels to narrow. By inhibiting this effect, the drug helps blood vessels relax and widen, improving blood flow and lowering blood pressure. This reduces the risk of heart attack, stroke, and kidney problems associated with long-term hypertension. It is often prescribed when other antihypertensive treatments are not suitable or effective.