Metformin for Diabetes | DiabetesTeam

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Metformin is a prescription drug approved by the Food and Drug Administration (FDA) to help improve blood glucose control in adults with type 2 diabetes. Metformin is considered an adjunct treatment to diet and exercise. Metformin is sold under the brand names Fortamet, Glumetza, and Riomet. Metformin may be prescribed alone or in with an insulin or sulfonylurea.

Metformin is a Biguanide. Metformin is believed to work by decreasing the amount of glucose produced by the liver and making the muscle tissue more sensitive to insulin.

How do I take it?
Prescribing information states that Metformin is generally taken once daily with the last meal of the day.

Metformin comes in tablet and oral solution forms.

Side effects
The FDA-approved label for Metformin lists common side effects including diarrhea, nausea, gas, stomach pain, and upset stomach.

Rare but serious side effects listed for Metformin include lactic acidosis (when the tissues and blood become too acidic) and systemic allergic reaction.

For answers to frequently asked questions about exposure to Metformin during pregnancy and breastfeeding, visit the experts at

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