Definition
Diovan is a brand name for valsartan, a medication primarily used to treat high blood pressure (hypertension) and heart failure. It functions by blocking the effects of angiotensin II, a hormone that causes blood vessels to constrict. By blocking this hormone, Diovan helps to relax and widen blood vessels, thus lowering blood pressure and easing the strain on the heart. Think of it as a pressure valve for your circulatory system. It needs to be taken regularly, as directed by a doctor, to be effective.