Atacand (candesartan cilexetil) is an angiotensin II receptor blocker used to treat high blood pressure (hypertension) and heart failure. It works by blocking the action of angiotensin II, a substance in the body that causes blood vessels to tighten, leading to improved blood flow and lower blood pressure. By reducing blood pressure, Atacand helps prevent strokes, heart attacks, and kidney problems. It is an effective medication for managing hypertension and heart failure, improving cardiovascular health, and reducing the risk of associated complications.