Benicar is a type of medication that is used to treat high blood pressure or “hypertension” in patients. More specifically, it is an angiotensin II receptor blocker (ARB) which blocks the hormone that causes vessel constriction, angiotensin II. The purpose of this medication is to prevent blood vessels from narrowing, which in turn improves blood flow while lowering blood pressure. Benicar may be prescribed in addition to other blood pressure medications and is marketed as being a viable treatment for adults and children over the age of six.