Renitec is indicated in the treatment of hypertension (includes combination with hydrochlorothiazide). Renitec is indicated for the treatment of symptomatic congestive heart failure usually in combination with diuretics and digitalis. Asymptomatic left ventricular dysfunction. Enalapril is in a group of drugs called ACE inhibitors. ACE stands for angiotensin converting enzyme. Enalapril is used to treat high blood pressure (hypertension), congestive heart failure, kidney problems caused by diabetes, and to improve survival after a heart attack.