Can Metformin cause anemia?! Metformin (Glucophage) is an oral medication that is taken to treat diabetes type 2. It can cause B12 deficiency which can lead to anemia along with other issues. Your risk of B12 (cyanocobalamin) deficiency increases the longer you take metformin. B12 deficiency anemia: The “popular” anemia is caused by iron deficiency […]