Benazepril is a prodrug of the angiotensin converting enzyme (ACE) inhibitor benazeprilat.?It is metabolized to benazeprilat by hepatic esterases. Benazepril inhibits the?in vitro?enzymatic activity of partially purified ACE isolated from rabbit lung (IC???= 2 nM). Reduces blood pressure and myocardial hypertrophy in spontaneous hypertensive rats.