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Metformin for type 2 diabetes January 2019

Robert S. Moskowitz, MD, FACP
Cleveland Clinic Journal of Medicine April 2019, 86 (4) 237; DOI: https://doi.org/10.3949/ccjm.86c.04003

TO THE EDITOR: I enjoyed reading “Should metformin be used in every patient with type 2 diabetes” by Makin and Lansang in the January 2019 issue.1

I just wanted to point out that metformin is a frequent cause of low serum vitamin B12 levels, and serum vitamin B12 levels should be monitored intermittently in patients using metformin.

REFERENCE

  1. ↵
    1. Makin V,
    2. Lansang MC
    . Should metformin be used in every patient with type 2 diabetes? Cleve Clin J Med 2019; 86(1):17–20. doi:10.3949/ccjm.86a.18039
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