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When should metformin be stopped before surgery and when is it considered safe to resume?

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When should metformin be stopped before surgery and when is it considered safe to resume?

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1 Answer
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Endocrinology · Tufts Medical Center Physicians Organization
Answered on

Immediate release metformin can generally be continued up until the day of surgery unless there is preoperative renal compromise such that estimated GFR drops below 30 cc/min. Extended release metformin that is taken in the evening can be held on the night prior to surgery.

If the patient is well wi...

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