Eviper 4mg Tablet belongs to a group of medicines known as angiotensin-converting enzyme (ACE) inhibitors. It relaxes and widens the blood vessels, making it easier for the blood to pass through the vessels. As a result of this, the heart does not have to work more to push the blood. Since the workload on the heart is reduced, it helps to lower the blood pressure and thus reduces the risk of heart attack and stroke. It is also used for the treatment and prevention of congestive heart failure.