Diovan is a medication available in strengths of 40mg, 80mg, and 160mg. It contains the active ingredient Valsartan, which is widely used to manage high blood pressure (hypertension) and to improve heart function in heart failure patients. Diovan is manufactured by several pharmaceutical companies and might be found under various brand names such as Valent, Valzaar, Starval, and Diovaal. This medication helps to relax blood vessels, allowing blood to flow more easily, thereby lowering blood pressure and decreasing the strain on the heart.