Evaluation of the Reported Rates of Severe Hypersensitivity Reactions Associated with Ferric Carboxymaltose and Iron (III) Isomaltoside 1000 in Europe Based on Data from EudraVigilance and VigiBase™ between 2014 and 2017

Birgit Ehlken (), Lennart Nathell, Annegret Gohlke, Derya Bocuk, Massoud Toussi and Stefan Wohlfeil
Additional contact information
Birgit Ehlken: IQVIA
Lennart Nathell: Nathell Medical AB
Annegret Gohlke: IQVIA
Derya Bocuk: IQVIA
Massoud Toussi: IQVIA
Stefan Wohlfeil: Vifor Pharma Management Ltd.

Drug Safety, 2019, vol. 42, issue 3, No 11, 463-471

Abstract: Abstract Introduction Hypersensitivity reactions (HSRs) are among the known adverse events of intravenous (i.v.) iron products. Of these, particularly severe HSRs such as anaphylaxis are of great clinical concern due to their life-threatening potential. Methods This was a retrospective pharmacoepidemiological study with a case-population design evaluating the number of reported severe HSRs following administration of the two i.v. iron products—ferric carboxymaltose and iron (III) isomaltoside 1000—in relation to exposure in European countries from January 2014 to December 2017. Exposure to both products was estimated using IQVIA MIDAS sales data in European countries. Information on spontaneously reported severe HSRs was obtained from and analysed separately for the two established safety surveillance databases EudraVigilance and VigiBase™ using the MedDRA® Preferred Terms anaphylactic reaction, anaphylactic shock, anaphylactoid reaction and anaphylactoid shock associated with administration of either product. Results Between 2014 and 2017, the reporting rate of severe HSRs per 100,000 defined daily doses (100 mg dose equivalents of iron) varied from 0.3 to 0.5 for ferric carboxymaltose and from 2.4 to 5.0 for iron (III) isomaltoside 1000. The reporting rate ratio for iron (III) isomaltoside 1000 versus ferric carboxymaltose was between 5.6 (95% CI 3.5–9.0) and 16.2 (95% CI 9.4–27.8). Conclusions Findings suggest that iron (III) isomaltoside 1000 is associated with a higher reporting rate of severe HSRs related to estimated exposure than ferric carboxymaltose in European countries. Future research investigating the occurrence of severe HSRs associated with i.v. ferric carboxymaltose and iron (III) isomaltoside 1000 is needed to broaden the evidence for benefit-risk assessment.

Date: 2019
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DOI: 10.1007/s40264-018-0769-5

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