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Metformin: Uses, Dosage, Side Effects, Warnings - Drugs.com
Metformin Oral: Uses, Side Effects, Interactions, Pictures
Metformin - Wikipedia
Metformin (Oral Route) Description and Brand Names - Mayo Clinic
Metformin (Oral Route) Proper Use - Mayo Clinic
Metformin: MedlinePlus Drug Information
Metformin: Uses and Side Effects - WebMD
Metformin: 7 things you should know - Drugs.com
Metformin - The Johns Hopkins Patient Guide to Diabetes
Metformin Oral Tablet: Side Effects, Weight Loss, and More