isinopril is used in the treatment of Hypertension (high blood pressure).Lisinopril is an angiotensin-converting enzyme (ACE) inhibitor. It works by reducing stress on the heart and relaxing blood vessels so that blood flows more smoothly and the heart can pump blood more efficiently.Common side effects of Lisinopril include ,Nausea, Taste change, Indigestion, Stomach pain, Diarrhea, Headache, Dizziness, Weakness, Decreased blood pressure, Cough, Increased blood lipid level