Prescription Products › Metformin 500mg (3 Month Supply) Prescription Image 1 of 1 Metformin 500mg (3 Month Supply) Prescription $45.00 Metformin is used to treat type 2 diabetes by helping to bring your blood sugar levels under control. Get notified by email when this product is in stock. Add To Cart Added! Metformin is used to treat type 2 diabetes by helping to bring your blood sugar levels under control.