Calcium channel blocker-ARB combinations are primarily used to treat high blood pressure. These medications work by combining the effects of calcium channel blockers, which relax blood vessels, with angiotensin II receptor blockers (ARBs), which help lower blood pressure by blocking a hormone that tightens blood vessels. These combinations are available in oral forms. Examples include amlodipine / olmesartan (Azor), amlodipine / valsartan (Exforge), and amlodipine / telmisartan.