Learn how metformin treats type 2 diabetes, including dosage, side effects, warnings, and its off-label use for weight loss and PCOS. Reviewed drug info Detailed Metformin dosage information for adults and children. Includes dosages for Diabetes Type 2; plus renal, liver and dialysis adjustments. Metformin is a prescription drug used for treating type 2 diabetes in adults and children. Side effects, storage and dosing information, drug interactions, and pregnancy safety are provided. Metformin with insulin: At first, 500 mg once a day. Then, your doctor may increase your dose by 500 mg every week if needed until your blood sugar is controlled. However, the dose is usually not more than 2500 mg per day. Children—Use and dose must be determined by your doctor. For oral dosage form (extended-release suspension): Metformin helps manage blood sugar in type 2 diabetes. WebMD reviews common side effects, extended-release benefits, vitamin B12 risks, and precautions. This article describes the dosages of metformin, as well as its strengths and how to take it. When taking metformin, always follow the dosage prescribed by your doctor. Metformin is a prescription medication that’s FDA-approved to treat Type 2 diabetes. Without insurance, 60 tablets of generic metformin 500 mg cost an average of $13.16. Insurance plans generally cover metformin to manage Type 2 diabetes, but coverage may vary by provider. With a GoodRx discount, you may pay as little as $9.00 for 60 tablets of generic metformin 500 mg at some pharmacies. 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. Learn about metformin usage and dosing. Read the latest news and reviews about the drug as well as potential side effects and popular alternatives. Find patient medical information for Metformin (Glucophage, Glumetza, and others) on WebMD including its uses, side effects and safety, interactions, pictures, warnings, and user ratings.