Olmesartan Medoxomil 20mg/40mg is an angiotensin II receptor blocker (ARB) used to treat high blood pressure (hypertension) and sometimes to protect the kidneys in patients with type 2 diabetes. Olmesartan works by blocking the action of angiotensin II, a hormone that causes blood vessels to constrict. By preventing this action, it helps relax and widen the blood vessels, which lowers blood pressure and reduces the heart’s workload. Lowering blood pressure can also help prevent strokes, heart attacks, and kidney problems. This medication is commonly prescribed for long-term blood pressure management and can be used alone or in combination with other antihypertensive agents.