Lisinopril is a prescription medication used to treat high blood pressure (hypertension) in both adults and children 6 years of age and older. By medical definition, high blood pressure is a condition that is defined as a repeatedly elevated blood pressure. Lists the various brand names available for medicines containing lisinopril. Find information on lisinopril use, treatment, drug class and molecular formula. Cozaar (losartan) and lisinopril are used to treat hypertension. Lisinopril is also used to treat congestive heart failure and to improve survival after a heart attack. Cozaar and lisinopril belong to different drug classes. Cozaar is an angiotensin receptor blocker (ARB) and lisinopril is an View images of Lisinopril and identify pills by imprint code, shape and color with the Drugs.com Pill Identifier. Find patient medical information for Lisinopril Oral on WebMD including its uses, side effects and safety, interactions, pictures, warnings and user ratings. Lisinopril (Prinivil, Zestril) is an inexpensive drug used to treat high blood pressure and heart failure. It is also given to reduce the risk of death after a heart attack. Lisinopril (Prinivil, Zestril) is an inexpensive drug used to treat high blood pressure and heart failure. It is also given to reduce the risk of death after a heart attack.