<p>Azilsartan medoxomil is an angiotensin II receptor blocker (ARB). Azilsartan helps blood vessels to dilate. It also helps to excrete of Sodium and water from body. This combination also contains a diuretic. Chlorthalidone works in the kidneys to flush excess water and salt (sodium) from the body. Together, these 2 medicines work to help lower blood pressure in people who need more than 1 medicine to treat their high blood pressure (hypertension).</p>