Safety and efficacy of ferumoxytol for the episodic treatment of iron deficiency anemia in patients with a history of unsatisfactory oral iron therapy: Results of a phase III, open-label, 6-month extension study

To the Editor: Although oral iron supplementation is recommended as first-line treatment for iron deficiency anemia (IDA), many patients are intolerant of oral iron due to gastrointestinal side effects or do not achieve adequate replenishment of iron stores 1,2. For such patients, administration of iron intravenously (IV) may be the preferred alternative 1,3,4; however, there are limited data evaluating repeat IV iron dosing over an extended period of time in patients intolerant to oral iron and without concurrent advanced renal dysfunction.