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Metformin: uses, dose & side effects

Written & medically reviewed by Dr. Sanjay Anbu, MBBS · Last reviewed

Metformin is the first-choice medicine for type 2 diabetes. It lowers blood sugar mainly by reducing sugar released by the liver and does not usually cause low sugar on its own.

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Typical dose — general reference only, NOT a prescription

MeasureRange
CategoryPrescription
Adult doseStart 500 mg once–twice daily with meals; usual range 1000–2000 mg/day (max ~2550 mg)
Child (paediatric) doseAge ≥10 years: 500 mg once–twice daily, up to 2000 mg/day

What it is used for

Common brand names

Common side effects

Before taking it — precautions

When to see a doctor urgently

Doses are a general reference, not a prescription. Doses shown are typical adult/paediatric references and vary with age, weight, kidney/liver function and the exact product. Paediatric doses are usually weight-based and must be set by a doctor. MedDroid cannot prescribe — always confirm metformin and your dose with a doctor or pharmacist and the leaflet inside the pack.

Frequently asked questions

Does metformin cause weight loss?

It is weight-neutral or causes modest weight loss for some, unlike some diabetes drugs that add weight.

Can I stop metformin when my sugar is normal?

Not on your own — normal sugar often means it is working. Change only with your doctor.

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Sources & further reading

Reviewed by Dr. Sanjay Anbu, MBBS. MedDroid is an AI medical assistant and can make mistakes. It provides general health information, not a diagnosis or medical advice — always consult a qualified clinician. In an emergency, contact your local emergency number immediately.