Houston, TX
A 38-year-old male asked:

How quickly does metformin work after taking dosage in morning?

1 doctor answer1 doctor weighed in
Dr. Robert Nelson
Family Medicine 38 years experience
Quick. peaks in 3 hr: Food can slow down absorption and cause incomplete absorption. The mean time to peak levels after an 850 mg tablet (not XR) is about 3.3 hours +/- 1 hour http://www.drugs.com/pro/glucophage.html
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Last updated Aug 3, 2014


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