NCIt definition : The active metabolite of benazepril, a carboxyl-containing angiotensin-converting
enzyme (ACE) inhibitor with antihypertensive activity. Once the prodrug benazepril
is metabolized to benazeprilat in the liver, benazeprilat competitively binds to and
inhibits ACE, thereby blocking the conversion of angiotensin I to angiotensin II.
This prevents the potent vasoconstrictive actions of angiotensin II, resulting in
vasodilation. Benazeprilat also decreases angiotensin II-induced aldosterone secretion
by the adrenal cortex, which leads to an increase in sodium excretion and subsequently
increases water outflow.;