descriptionsIrbesartan is among a class of drugs called angiotensin receptor blockers and is similar to losartan (Cozaar) and valsartan (Diovan). All three drugs block angiotensin II, a chemical that causes the arteries and veins to narrow, from attaching to the arteries and veins and causing them to narrow. As a result, the arteries and veins dilate (become larger), and blood pressure is reduced. When the blood pressure is reduced, the heart doesn't have to work as hard to pump blood. Irbesartan was approved by the FDA in 1998.
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