what is cozaar
COZAAR is a prescription medicine called an angiotensin receptor blocker (ARB). It is used: 1  alone or with other blood pressure medicines to lower high blood pressure (hypertension). 2  to lower the chance of stroke in patients with high blood pressure and a heart problem called left ventricular hypertrophy.3  COZAAR may not help Black patients with this problem.t is used: 1  alone or with other blood pressure medicines to lower high blood pressure (hypertension). 2  to lower the chance of stroke in patients with high blood pressure and a heart problem called left ventricular hypertrophy. 3  COZAAR may not help Black patients with this problem.