ACE inhibitors stand for Angiotensin-converting-enzyme inhibitors.
ACE inhibitors are used for the treatment of high blood pressure and heart diseases.
These inhibitors perform their action by causing a relaxation of the blood vessels which results in decreased blood pressure.
Further, these inhibitors prevent the conversion of angiotensin I to angiotensin II and the site of this conversion is the lungs, since this conversion is blocked by these inhibitors, an unrelenting persistent cough is a common side effect associated with the use of these inhibitors.