Quinapril Hydrochloride (Accupril®, Acuitel®) is a medicine which may be employed to treat high blood pressure. Hypertensive patients may take it alone or in conjunction with other medications for elevated blood pressure. Quinapril Hydrochloride (Accupril®, Acuitel®) is commonly prescribed with a particular type of diuretic, called a thiazide water pill (like hydrochlorothiazide. It belongs to the ACE inhibitor drug group and affects the angiotensin I chemical which is found within the blood. Quinapril Hydrochloride (Accupril®, Acuitel®) blocks this chemical’s natural conversion into a substance which encourages the body to retain greater amounts of water and salt. Doctors may prescribe Quinapril Hydrochloride (Accupril®, Acuitel®) to encourage better blood flow through the circulatory system, bring down high blood pressure, and to treat congestive heart failure.