Intravenous ferric carboxymaltose compared with oral iron in the treatment of postpartum anemia: a randomized controlled trial

David B Van Wyck, Mark G Martens, Melvin H Seid, Jeffrey B Baker, Antoinette Mangione
Obstetrics and Gynecology 2007, 110 (2 Pt 1): 267-78

OBJECTIVE: To estimate efficacy of rapid, large-dose intravenous (IV) administration of ferric carboxymaltose compared with oral iron therapy in anemic postpartum women.

METHODS: In a randomized, controlled trial, we assigned anemic women (hemoglobin [Hb] less than or equal to 10 g/dL) within 10 days postpartum to receive either IV ferric carboxymaltose (less than or equal to 1,000 mg over 15 minutes, repeated weekly to achieve a total calculated replacement dose) or ferrous sulfate (FeSO(4)) 325 mg orally thrice daily for 6 weeks.

RESULTS: One hundred seventy-four patients received 350 IV doses of ferric carboxymaltose (mean total dose 1,403.1 mg) in 3, 2, or 1 injection (10.9%, 79.3%, or 9.8% of patients, respectively); 178 received FeSO(4). Patients assigned to IV ferric carboxymaltose compared with those assigned to oral iron achieved a Hb rise greater than or equal to 2.0 g/dL earlier (7.0 compared with 14.0 days, P<.001), were more likely to achieve a Hb rise greater than or equal to 3.0 g/dL at any time (86.3% compared with 60.4%, P<.001), and were more likely to achieve a Hb greater than 12.0 g/dL (90.5% compared with 68.6%, P<.001). A similar proportion of patients achieved a Hb rise greater than or equal to 2.0 g/dL (96.4% compared with 94.1%, IV compared with oral, P=.443). There were no serious adverse drug reactions.

CONCLUSION: Large-dose IV ferric carboxymaltose administration is a new iron agent that is effective for the treatment of postpartum anemia. When compared with oral ferrous sulfate, IV ferric carboxymaltose is better tolerated, prompts a more rapid Hb response, and corrects anemia more reliably.



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