Zestril Tab 5mg is a prescription medication containing lisinopril, an angiotensin-converting enzyme (ACE) inhibitor. It is primarily used to treat high blood pressure (hypertension), and heart failure, and to improve survival after a heart attack. These tablets work by relaxing blood vessels, allowing blood to flow more easily, which helps to lower blood pressure and reduce the workload on the heart. Use this medication under a doctor's supervision, as it treats serious conditions. Trust this medication to provide effective relief from high blood pressure, heart failure, and better quality of life after a heart attack.