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Could I be allergic to metformin?

It's possible to be allergic to metformin (Glucophage, Fortamet), a prescription medication that's used to control blood sugar levels in people with type 2 diabetes. The signs of an allergic reaction to metformin include:
  • hives
  • trouble breathing
  • a swollen face, lips, tongue or throat

Get emergency medical help right away if you develop any of these symptoms. If it turns out that you are allergic to metformin, talk to your doctor about other ways to control your blood sugar levels.

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Important: This content reflects information from various individuals and organizations and may offer alternative or opposing points of view. It should not be used for medical advice, diagnosis or treatment. As always, you should consult with your healthcare provider about your specific health needs.