Get our free Olmesartan medoxomil coupon and be eligible to receive a discount. You can reduce your Olmesartan medoxomil cost by up to 75% with our free Olmesartan medoxomil discount card. Bring it to a participating pharmacy near you to save on your prescription medication.Olmesartan is an angiotensin II receptor antagonist. Olmesartan keeps blood vessels from narrowing, which lowers blood pressure and improves blood flow. Olmesartan is used to treat high blood pressure (hypertension) in adults and children who are at least 6 years old. It is sometimes given together with other blood pressure medications. Olmesartan may also be used for purposes not listed in this medication guide.