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What are the side effects of Riomet?

The most common side effects of Riomet (metformin) are diarrhea, nausea, vomiting, flatulence, indigestion, abdominal discomfort, weakness and headache. Other side effects may include a metallic taste in the mouth, increased sweating, chest pain, flu symptoms, heart palpitations, shortness of breath and nail problems.

Riomet may cause blood sugar levels to become too high, a condition called hyperglycemia that can cause extreme thirst or hunger, weakness, frequent urination and blurred vision. Call your doctor immediately if you develop any of these symptoms. Riomet can also cause blood sugar levels to drop too low, which is known as hypoglycemia. You can treat the symptoms of hypoglycemia, such as shakiness, dizziness, weakness, sweating, hunger and numbness around the mouth, by eating or drinking something with sugar and following any other directions your doctor may give you. Extreme hypoglycemia can cause seizures, loss of consciousness or confusion, which means you won't be able to get help for yourself. Make sure everyone you spend time with regularly knows about these symptoms and to get medical help for you immediately.

A rare side effect of Riomet is a condition called lactic acidosis that can develop if a person taking this drug also drinks too much alcohol or drinks too often. Lactic acidosis causes nausea and weakness and likely requires hospitalization. Talk to your doctor about how much alcohol you can safely drink while you're taking Riomet.

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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.