Diabetes research and clinical practice
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Diabetes Res. Clin. Pract. · Jun 2014
Case ReportsLong term use of metformin leading to vitamin B 12 deficiency.
Metformin is a commonly used oral hypoglycaemic agent worldwide. Gastrointestinal side effects and lactic acidosis related to metformin usage are commonly recognized. However, the associated vitamin B12 deficiency is less well known. We present a case of long term metformin use resulting in vitamin B12 deficiency.