Angiotensin-converting enzyme (ACE) inhibitors are a class of drugs used to treat hypertension (high blood pressure). The angiotensin-converting enzyme converts angiotensin I, which is produced by the body, to angiotensin II, a very potent chemical that causes the muscles surrounding the blood vessels to contract, narrowing the vessels. Angiotensin-converting enzyme (ACE) inhibitors, as the name suggests, reduce the activity of the angiotensin- converting enzyme. This causes dilation of the vessels, which means your heart does not have to work as hard to pump your blood.

-- ACE inhibitors that should direct to the above message: 

Lotensin (benezapril), Capoten (captopril), Vasotec (enalapril), Monopril (fosinopril sodium), Prinivil (lisinopril), Zestril (lisinopril), Univasc (moexipril hydrochloride), Aceon (perindopril erbumine), Accupril (quinapril), Altace (ramipril), Mavik (trandolapril)