ACE inhibitors
ACE inhibitors block the enzyme that converts angiotensin I to angiotensin II, which relaxes blood vessels and lowers aldosterone. They treat high blood pressure and heart failure and help protect the kidneys in people with diabetes. A dry, persistent cough is the most common side effect, and angioedema is a rare but life-threatening reaction. Blood pressure, potassium, and kidney function are monitored during treatment, and they are avoided in pregnancy.