ACE inhibitors are used to treat high blood pressure, heart failure, and to improve survival after a heart attack. They also have other uses, such as protecting your kidneys if you have diabetes. ACE inhibitors work by relaxing your blood vessels, which helps to lower blood pressure and make it easier for your heart to pump blood. These medications are usually taken as oral pills. Examples include lisinopril (Zestril), benazepril (Lotensin), enalapril (Vasotec), and ramipril (Altace). You can talk to a healthcare professional to find the best option for you.