How does benazepril treat congestive heart failure?

Benazepril (an angiotensin-converting enzyme inhibitor -- or ACE inhibitor, also sold under the brand name, Lotensin) works to treat congestive heart failure as follows: 
  • Benazepril blocks the enzyme responsible for production of angiotensin II --  a substance that causes arteries to constrict, resulting in high blood pressure.  
  • By decreasing the rate of angiotensin II formation, benazepril relaxes arteries, lowers blood pressure and improves cardiac output.
Lotensin HCT combines benazepril and hydrochlorothiazide, a diuretic. Although generally used for later stages of high blood pressure, some doctors prescribe Lotensin HCT to treat congestive heart failure.

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