Olsertain 20 mg Tablet 15's, are medications used to treat hypertension (high blood pressure). Olsertain 20 mg Tablet 15's are also used to lower the risk of kidney issues, heart attacks, and strokes. A medical condition known as hypertension occurs when the blood exerts excessive pressure against the blood vessel walls. As a result, the heart must use more effort to pump blood throughout the body. However, obstructed blood flow to the heart or brain causes a heart attack or stroke, respectively. Olmesartan is only available with a prescription and is found in Olsertain 20 mg Tablet 15's. It blocks angiotensin receptors (ARB). It is effective.Disclaimer:For more information contact your physician.