Abstract
Background
The incidence of drug hypersensitivity or anaphylactic reactions in clinical trial databases is thought to be underestimated due to variable clinical presentations and lack of clear definitions.
Objective
Our objective was to develop a more comprehensive, systematic methodology for retrospectively identifying potential hypersensitivity or anaphylactic reactions reported in patients treated with investigational drugs in clinical trials and to accurately assess and characterise the risk.
Methods
A three-step approach was developed to identify hypersensitivity or anaphylactic reactions: clinical trial database search, medical review, and adjudication to confirm or rule out cases. The database search strategy consisted of the narrow search for Standardized MedDRA Query (SMQ) Hypersensitivity, a modified MedDRA query based on SMQ Anaphylactic reaction, and pyrexia-related MedDRA Preferred Terms. The cases identified from the search were further medically reviewed taking into consideration the temporal relationship, seriousness, severity, course, and management of the events, action taken, and outcomes of adverse events. Those cases deemed to have potentially drug-related hypersensitivity were then adjudicated to be confirmed or ruled out.
Results
The method was applied to a clinical trial database containing safety data for 421 patients treated with an investigational drug. Application of the methodology led to 19 hypersensitivity cases being identified. Of these, 12 were classified as immediate reactions and 7 as non-immediate reactions.
Conclusion
This three-step method provided a thorough and robust way to identify hypersensitivity reactions, including anaphylaxis, in a clinical trial database. This method could be applied to investigational drugs to improve early detection and monitoring of potential safety concerns, subsequent patient safety management strategies, and potentially programme-wide drug development decisions. Algorithmic tools and narrow and/or broad SMQs should be considered when evaluating safety concerns. The authors also recommend a revision of the MedDRA SMQ of Anaphylactic reaction.
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Acknowledgements
The authors would like to acknowledge Alison Lee and Isobel Anderson for their contribution to programming support. The authors would like to acknowledge Bernadette Tynan, MSc, of Ashfield Healthcare communications, Macclesfield, UK, part of UDG Healthcare plc, for medical writing support that was funded by AstraZeneca in accordance with Good Publications Practice (GPP3) guidelines (https://www.ismpp.org/gpp3).
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This study was funded by AstraZeneca.
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Hugo Xavier, Indira Hara, Lone H. Ottesen, Remy B. Verheijen, Dana Ghiorghiu and Claire Morgan are AstraZeneca employees and shareholders.
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Data was obtained from clinical trial database in an excel spreadsheet (data on file). Data underlying the findings described in this manuscript may be obtained in accordance with AstraZeneca’s data sharing policy described at https://astrazenecagrouptrials.pharmacm.com/ST/Submission/Disclosure.
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All authors contributed to the study conception and design. Material preparation, data collection and analysis were performed by all authors. The first draft of the manuscript was written by Hugo Xavier, Indira Hara, and Claire Morgan and all authors commented on previous versions of the manuscript. All authors read and approved the final manuscript.
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Xavier, H., Hara, I., Ottesen, L.H. et al. A Comprehensive Methodology to Systematically Identify Drug Hypersensitivity and Anaphylactic Reactions in Clinical Trial Databases. Pharm Med 34, 335–345 (2020). https://doi.org/10.1007/s40290-020-00350-z
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DOI: https://doi.org/10.1007/s40290-020-00350-z