What is "losartan"

n. An angiotensin receptor antagonist that shows antihypertensive activity

Losartan ( rINN) is an angiotensin II receptor antagonist drug used mainly to treat high blood pressure ( hypertension). It was the first angiotensin II antagonist to be marketed. Losartan potassium is marketed by Merck & Co. Inc. under the trade name Cozaar, and is available in generic form.