Learn about side effects, how it's taken, and more of metformin. It's a generic prescription drug that's used to help manage blood sugar levels in adults and some children with type 2 diabetes. Metformin is a first-line treatment used for type 2 diabetes in adults and children 10 years and older to help improve blood sugar levels. It is also used off-label to improve symptoms of polycystic ovarian syndrome (PCOS) and other conditions. Metformin is used together with proper diet and exercise to treat high blood sugar levels caused by type 2 diabetes. This medicine reduces the absorption of sugar from the intestines, reduces the release of stored sugar from the liver, and helps your body use sugar better. Metformin 500 mg is a common starting dose for type 2 diabetes. Learn how it works, its side effects, and who should avoid it. Overview: Metformin is medicine you take to help keep your blood sugar from getting too high. Common side effects may include stomach problems, such as diarrhea, nausea, vomiting, stomach pain. Detailed Metformin dosage information for adults and children. Includes dosages for Diabetes Type 2; plus renal, liver and dialysis adjustments. Doctors may prescribe metformin to manage blood sugar levels in adults with type 2 diabetes. It’s typically prescribed in combination with a balanced diet and increased physical activity. If your.