Glucophage 500mg is a prescription medication containing metformin, which is used to treat type 2 diabetes. Each tablet contains 500mg of metformin hydrochloride. The package contains 100 tablets and is manufactured by Merck Serono. Metformin works by lowering blood glucose levels by reducing glucose production in the liver and improving insulin sensitivity in body tissues. This medication is typically prescribed along with diet and exercise to improve blood sugar control in adults and children with type 2 diabetes. As this is a prescription medication, it should only be taken under the supervision and direction of a healthcare provider. Common side effects may include nausea, diarrhea, and stomach upset.