When should I call my doctor if I am taking Glucophage?

You should call your doctor right away if you experience the following symptoms while taking Glucophage (metformin), a drug prescribed to treat type 2 diabetes:

• feeling weak, tired or uncomfortable
• unusual muscle pain
• problems breathing
• increased sleepiness
• unexplained stomach discomfort
• feeling cold, dizzy or light-headed
• sudden onset of a slow or irregular heartbeat

These can be signs of a rare but serious side effect called lactic acidosis.

Some people who take Glucophage with other diabetes drugs may develop hypoglycemia (low blood sugar). Not eating enough food or drinking alcohol may also lead to this condition. If not treated promptly, hypoglycemia can lead to confusion, seizures or unconsciousness. Tell your friends and family of the signs of hypoglycemia so they can call your doctor if you are unable.

Glucophage can also cause other side effects, including diarrhea, nausea, upset stomach and a metallic taste. Tell your doctor if your side effects do not go away. Monitor your blood sugar as directed, and tell your doctor if your levels change suddenly or are not within a healthy range.

If you become pregnant while taking Glucophage, call your doctor, because this drug may affect the developing fetus. Your doctor will help you determine whether to continue the medication.