Lisinopril is a medication commonly used to treat high blood pressure and heart failure. It belongs to a class of drugs known as ACE inhibitors, which work by relaxing blood vessels, making it easier for the heart to pump blood. This helps lower blood pressure and reduces the risk of heart-related complications. In addition to managing hypertension, lisinopril may also be prescribed to improve survival after a heart attack. It is usually taken once daily, and patients should follow their doctor's instructions regarding dosage and any potential side effects. Regular monitoring of blood pressure is important while on this medication.