QUESTION & ANSWER
Q: How long does it take for metformin to work?

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A:

Metformin can start to improve blood sugar control within a week or so. But it can take up to three months to see the full effect. So, doctors often start people on a low metformin dosage and gradually increase it. Closely monitoring your blood sugar during this time will help your doctor judge how well it’s working.

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  1. Metformin. U.S. National Library of Medicine. https://medlineplus.gov/druginfo/meds/a696005.html 
  2. Metformin (Oral Route). Mayo Foundation for Medical Education and Research. https://www.mayoclinic.org/drugs-supplements/metformin-oral-route/proper-use/drg-20067074