A Case of Nonsteroidal Anti-Inflammatory Drug-Induced Anaphylaxis Confirmed by Skin Testing

Authors

    Jaechun Lee

DOI:

https://doi.org/10.18063/jmds.v8i1.146

Keywords:

Nonsteroidal anti-inflammatory drugs, Drug hypersensitivity, Anaphylaxis, Diclofenac, NSAID-induced hypersensitivity

Abstract

Nonsteroidal anti-inflammatory drugs (NSAIDs) are collectively a major culprit of drug-induced hypersensitivity. No reliable diagnostic tests, other than a direct challenge, are available for detecting the hypersensitivity. Cross-reactivity among NSAIDs that inhibit cyclooxygenase-1 is common. However, in rare cases, the mechanism underlying hypersensitivity can be understood from the immunological point of view, without involving cross-reactivity of NSAIDs or even with a positive skin test for an NSAID. A 55-year-old woman was referred to the Emergency Department for anaphylaxis. She suffered from generalized hives, chest tightness, and hypotension a few minutes after intramuscular injection of diclofenac. One year ago, she had experienced a similar reaction after intramuscular injection of aceclofenac. Thereafter, she had been taking naproxen as needed to relieve her osteoarthritis pain, without having an adverse reaction. To confirm drug hypersensitivity and to find alternative drugs, provocation tests were performed with acetaminophen, celecoxib, and lysine-aspirin. All tests were negative, and a skin prick test with diclofenac was also negative. However, intradermal injection of 0.05 mL (37.5 mg/mL) diclofenac provoked an anaphylactic shock and resulted in her admission. Here, we report a rare case of single NSAID-induced anaphylaxis, which was only triggered by acetic acid derivatives of NSAIDs, presumably by an immunoglobulin E-mediated reaction.

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Published

2023-08-25