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Glucophage side effects

Get emergency medical help if you have signs of an allergic reaction to Glucophage: hives; difficult breathing; swelling of your face, lips, tongue, or throat.

Some people using metformin develop lactic acidosis, which can be fatal. Get emergency medical help if you have even mild symptoms such as:

• unusual muscle pain;

• feeling cold;

• trouble breathing;

• feeling dizzy, light-headed, tired, or very weak;

• stomach pain, vomiting; or

• slow or irregular heart rate.