Which of the following is a pro drug?: (A) Hydralazine, (B) Clonidine, (C) Captopril, (D) Enalapril
Answer is D. ACEI inhibitors are all prodrugs except captopril and ramipril. hydralazine is an aeriolar dilator enalapril is an ACEI inhibitor used in hypeensive emergencies. Ref: KDT 6/e pg 20.