Metformin is a medication commonly used to treat type 2 diabetes. It helps lower blood sugar levels by improving the body's sensitivity to insulin, which is a hormone that regulates glucose in the bloodstream. Metformin is often prescribed alongside a healthy diet and exercise to manage diabetes effectively. In addition to its primary use, metformin may also have benefits for weight management and reducing the risk of certain complications associated with diabetes. It is usually taken in pill form and can be prescribed alone or in combination with other diabetes medications.