ACE inhibitor

ACE inhibitor (āˌsēˌēˈ, ās) [key] or angiotensin-converting enzyme inhibitor ănˌjēōtĕnˈsĭn, drug used to reduce elevated blood pressure (see hypertension), to treat congestive heart failure, and to alleviate strain on hearts damaged as a result of a heart attack (see infarction). ACE inhibitors block production of an enzyme that helps convert the protein angiotensin 1 into angiotensin 2, a protein that makes blood vessels constrict and promotes retention of fluid, raising blood pressure. Thus ACE inhibitors act to widen the blood vessels and make it easier for the heart to pump blood through the body. captopril (Capoten), ramipril (Altace), and enalapril (Vasotec) are commonly used ACE inhibitors. Angiotensin-receptor blockers (ARBs), such as losartan (Cozaar) and valsartan (Diovan), reduce hypertension by displacing angiotensin 2 from receptors on the surface of cells. ARBs are used as alternatives to the less expensive ACE inhibitors because they have fewer side effects.

The Columbia Electronic Encyclopedia, 6th ed. Copyright © 2012, Columbia University Press. All rights reserved.

More on ACE inhibitor from Fact Monster:

  • Miguel Ondetti - Biography of Miguel Ondetti, By synthesizing captopril during their careers at Bristol Myers Squibb, Cushman and Ondetti created the first medical treatment that signifi…
  • David Cushman - Biography of David Cushman, By synthesizing captopril during their careers at Bristol Myers Squibb, Cushman and Ondetti created the first medical treatment that signifi…
  • drugs - drugs drugs, substances used in medicine either externally or internally for curing, alleviating, ...
  • hypertension - hypertension hypertension or high blood pressure,elevated blood pressure resulting from an increase ...
  • angiotensin-receptor blocker - angiotensin-receptor blocker: angiotensin-receptor blocker: see under ACE inhibitor.

See more Encyclopedia articles on: Pharmacology