• Med Princ Pract · Jan 2014

    Case Reports

    Metformin-induced hemolytic anemia.

    • Serap Kirkiz, Nese Yarali, Ozlem Arman Bilir, and Bahattin Tunc.
    • Ankara Children's Hematology and Oncology Hospital, Ankara, Turkey.
    • Med Princ Pract. 2014 Jan 1; 23 (2): 183-5.

    ObjectiveTo report a rare side effect of metformin, an oral antidiabetic drug that is used for the treatment of type 2 diabetes mellitus.Clinical Presentation And InterventionA 17-year-old boy was hospitalized for receiving acute lymphoblastic leukemia treatment that was composed of vincristine, L-asparaginase, daunorubicin, and prednisone. Hyperglycemia was determined without any clinical sign and metformin was started for steroid-induced insulin resistance. On the second day of metformin treatment, the patient's hemoglobin level decreased, and a direct Coombs test was positive for immunoglobulin G but negative for complement. An indirect Coombs test was negative. The glucose-6-phosphate dehydrogenase level was within the normal range. Drug-induced hemolytic anemia was suspected and metformin was discontinued. The jaundice gradually disappeared and there was no requirement for red blood cell transfusions.ConclusionThis case showed that physicians should be aware of the potential side effect of metformin although it is infrequent.© 2013 S. Karger AG, Basel.

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