Diovan (valsartan) is a part of the angiotensin II receptor blocker (ARBs) drug class. When combined with other forms of medication this drug can be is used to treat hypertension, heart failure, strokes, and heart attack. Diovan works by relaxing the blood vessels, improving the blood flow, so there is less of a possibility for damage to the brain, heart and kidneys. Diovan is a prescription drug that is used in treating high blood pressure. Diovan is also used in adults to treat heart failures and heart attacks. This medication has a generic name known as valsartan which belongs to a class of drug known as angiotensin receptor blockers (ARBs). Diovan allows the blood to flow smoothly lowering blood pressure in the blood vessels. The doctor is the only person who is capable of giving the dosage to you. It dosage can lead to some of the side effects that you should report to your doctor. Use the drug as directed or instructed by the doctor to be safe.