ACE inhibitors, or angiotensin-converting enzyme inhibitors, are a class of medications commonly used to treat conditions such as hypertension, heart failure, and kidney disease. They work by blocking the action of the angiotensin-converting enzyme, which helps regulate blood pressure and fluid balance in the body. By inhibiting this enzyme, ACE inhibitors can help relax blood vessels, reduce blood pressure, and improve heart function. This can provide numerous benefits for patients with cardiovascular or renal issues. ACE inhibitors are often prescribed along with other medications and lifestyle changes to manage these conditions effectively.