NCIt definition : A long-acting, small polar angiotensin-converting enzyme (ACE) inhibitor with antihypertensive
activity. Libenzapril 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 and results in vasodilation. Libenzapril also decreases
angiotensin II-induced aldosterone secretion by the adrenal cortex, which leads to
an increase in sodium excretion and subsequently increases water outflow.;