Univasc is an active non sulfhydryl angiotensin-converting enzyme inhibitor, ACE, which treats congestive heart failure and hypertension. Univasc is available in generic form as moexipril hydrochloride. It can be taken alone or with other diuretics or antihypertensive. Univasc acts by relaxing the blood vessels that, as a result, lowers the blood pressure. It blocks the conversion of angiotensin I to angiotensin II.