Diovan (generic: valsartan) is a prescription medication used to treat high blood pressure in adults and children, to treat heart failure in adults, and to improve the chance of living after a heart attack in adults.  Diovan belongs to a group of drugs called angiotensin II receptor antagonists, which help blood vessels to relax.

This medication comes in tablet form and is usually taken once or twice a day. Diovan can be taken with or without food.

Common side effects of Diovan include headache, diarrhea, cough, and dizziness. Do not drive or operate machinery until you know how Diovan will affect you.