Venofer may reduce the absorption of concomitantly administered oral iron preparations.

Published studies on intravenous iron sucrose treatment after the first trimester of pregnancy have not shown adverse maternal or fetal outcomes (see Data). Available reports of intravenous iron sucrose use in pregnant women during the first trimester are insufficient to assess the risk of major birth defects and miscarriage. There are risks to the mother and fetus associated with untreated IDA in pregnancy as well as risks to the fetus associated with maternal severe hypersensitivity reactions (see Clinical Considerations). Animal reproduction studies of iron sucrose administered to rats and rabbits during the period of organogenesis at elemental iron doses equivalent to the maximum recommended human dose based on body surface area revealed no evidence of harm to the fetus (see Data). The estimated background risk of major birth defects and miscarriage for the indicated populations is unknown. Adverse outcomes in pregnancy occur regardless of the health of the mother or the use of medications. In the U.S. general population, the estimated background risk of major birth defects and miscarriage in clinically-recognized pregnancies is 2-4% and 15-20%, respectively.

Clinical Considerations

Disease-associated maternal and/or embryo/fetal risk

Iron deficiency anemia during pregnancy should be treated. Untreated IDA in pregnancy is associated with adverse maternal outcomes such as post-partum anemia. Adverse pregnancy outcomes associated with IDA include increased risk for preterm delivery and low birth weight.

Fetal/Neonatal adverse reactions

Severe adverse reactions including circulatory failure (severe hypotension, shock including in the context of anaphylactic reaction) may occur in pregnant women with parenteral iron products (such as Venofer) which may cause fetal bradycardia, especially during the second and third trimester.

Published data from randomized controlled studies and prospective observational studies on the use of Venofer in pregnant women have not reported an association of Venofer and adverse developmental outcomes. However, these studies did not include women exposed during the first trimester of pregnancy and were not designed to assess the risk of major birth defects. Maternal adverse events reported in these studies are similar to those reported during clinical trials in adult males and non-pregnant females [seeAdverse Reactions (6.1)].

Animal Data

Iron sucrose was administered intravenously to rats and rabbits during the period of organogenesis at elemental iron doses up to 13 mg/kg/day (0.25 times or equivalent to the maximum recommended human dose based on body surface area, respectively) and revealed no evidence of harm to the fetus.