The Journal of Allergy and Clinical Immunology: In Practice
Review and Feature ArticleDo Corticosteroids Prevent Biphasic Anaphylaxis?
Section snippets
Methods
We defined a biphasic anaphylactic reaction as the recurrence or new symptoms of anaphylaxis after an anaphylactic event without reexposure to the trigger, following an asymptomatic interval of at least 1 hour. Studies that clearly documented reactions meeting this definition were included. We included relevant case series, prospective and retrospective cohort studies, and clinical trials. Studies that did not describe biphasic reactions and isolated case reports were excluded. We followed the
Conclusions
Biphasic anaphylactic reactions are more likely to occur in moderate to severe anaphylaxis or when anaphylaxis is not treated with timely epinephrine. Because of the potential detrimental adverse effects of corticosteroids and lack of compelling evidence demonstrating an effective role in reducing anaphylaxis severity or preventing biphasic anaphylaxis, we do not advocate for their routine use in anaphylaxis.
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Conflicts of interest: A. K. Ellis has received research support and consultancy/speaker fees from Pfizer; has received consultancy fees from ALK Abello, Merck, and Novartis; has received research support from Circassia Ltd, Green Cross, GlaxoSmithKline, Merck, Novartis, Sanofi, and SunPharma Advance Research Corporation; and has received lecture fees from Aralez, AstraZeneca, Merck, Novartis, Pfizer, and Takeda. W. Alqurashi declares no relevant conflicts of interest.