Olkem AM 20mg Tablet 15'S contains Angiotensin receptor blocker Olmesartan and amlodipine (calcium channel blocker). Olmesartan relaxes blood arteries by blocking the hormone angiotensin, which is how it functions. This makes the heart's pumping action more effective and the blood flow more smoothly. On the other hand, amlodipine works by relaxing the blood vessels. As a result, the heart works less and pumps blood more effectively throughout the body. Thus, both assist in lowering excessive blood pressure, decreasing the risk of heart attack or stroke.Disclaimer:For more information contact your physician.