NCIt definition : The maleate salt form of enalapril, a dicarbocyl-containing peptide and angiotensin-converting
enzyme (ACE) inhibitor with antihypertensive activity. As a prodrug, enalapril is
converted by de-esterification into its active form enalaprilat. Enalaprilat 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. Enalapril also decreases angiotensin II-induced aldosterone secretion
by the adrenal cortex, which leads to an increase in sodium excretion and subsequently
increases water outflow.;