Captopril is a medication primarily 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 reduce the workload on the heart. In addition to hypertension, Captopril is also prescribed for certain kidney conditions, particularly in patients with diabetes. Common side effects may include a persistent cough, elevated potassium levels, and low blood pressure. Regular monitoring by a healthcare provider is essential while using this medication.