ARB: Angiotensin Receptor Blocker – Definition

Angiotensin receptor blockers (ARBs) are pills that help lower your blood pressure. They do this by stopping a body chemical called angiotensin from tightening your blood vessels. When the vessels stay relaxed and open, it’s easier for blood to flow, so your heart doesn’t have to work as hard. Some examples of these medicines are losartan and valsartan.

Some people can’t take a similar medicine called an ACE inhibitor because it makes them cough, so doctors give them an ARB instead. ARBs can also help protect your kidneys if you have diabetes and make your heart work better if it’s weak. They don’t usually cause many problems, but they might make you feel dizzy or raise your potassium levels, so doctors check your blood from time to time.


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