• Alaa Qassim, Ben W Mol, Rosalie M Grivell, and Luke E Grzeskowiak.
• School of Pharmacy and Medical Sciences, University of South Australia, Adelaide, SA, Australia.
• Aust N Z J Obstet Gynaecol. 2018 Feb 1; 58 (1): 22-39.

BackgroundIntravenous (IV) iron in pregnancy is useful where oral iron is not tolerated or a rapid replenishment of iron is required.AimsTo review the literature on the efficacy and safety of different IV iron preparations in the management of antenatal iron-deficiency anaemia (IDA).Materials And MethodsWe searched MEDLINE, Embase and Scopus from inception to June 2016. Eligible studies were randomised controlled trials (RCTs) and observational studies, involving administration of IV iron (ferric carboxymaltose (FCM), iron polymaltose (IPM) or iron sucrose (IS)), regardless of comparator, to manage antenatal IDA. Two independent reviewers selected studies, extracted data and assessed quality.ResultsA total of 47 studies were eligible (21 RCTs and 26 observational studies), investigating IS (n = 2635; 41 studies), FCM (n = 276; four studies) and IPM (n = 164; three studies). All IV preparations resulted in significant improvements in haematological parameters, with a median increase of 21.8 g/L at 3-4 weeks and 30.1 g/L by delivery, but there was no evidence of any associated improvements in clinical outcomes. A greater median increase in Hb was observed with a high (25 g/L; range: 20-39.6 g/L) compared with low dose (20 g/L; range: 6.2-50.3 g/L). The median prevalence of adverse drug reactions for IPM (2.2%; range: 0-4.5%) was lower than FCM (5.0%; range: 0-20%) and IS (6.7%; range: 0-19.5%).ConclusionWhile IV iron in pregnancy improves haematological parameters, there is an absence of evidence for improvements in important maternal or perinatal outcomes. No single preparation of IV iron appeared to be superior, with the current IV iron preparation of choice largely determined by cost and convenience around administration.© 2017 The Royal Australian and New Zealand College of Obstetricians and Gynaecologists.

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