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. 2014 Apr 24;10(1):19.
doi: 10.1186/1710-1492-10-19. eCollection 2014.

Non-steroidal anti-inflammatory drug hypersensitivity: association with elevated basal serum tryptase?

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Free PMC article

Non-steroidal anti-inflammatory drug hypersensitivity: association with elevated basal serum tryptase?

Cornelia S Seitz et al. Allergy Asthma Clin Immunol. .
Free PMC article

Abstract

Background: It is hypothesized that because of higher mast cell numbers and mediator release, mastocytosis predisposes patients for systemic immediate-type hypersensitivity reactions to certain drugs including non-steroidal anti-inflammatory drugs (NSAID).

Objective: To clarify whether patients with NSAID hypersensitivity show increased basal serum tryptase levels as sign for underlying mast cell disease.

Methods: As part of our allergy work-up, basal serum tryptase levels were determined in all patients with a diagnosis of NSAID hypersensitivity and the severity of the reaction was graded. Patients with confirmed IgE-mediated hymenoptera venom allergy served as a comparison group.

Results: Out of 284 patients with NSAID hypersensitivity, 26 were identified with basal serum tryptase > 10.0 ng/mL (9.2%). In contrast, significantly (P = .004) more hymenoptera venom allergic patients had elevated tryptase > 10.0 ng/mL (83 out of 484; 17.1%). Basal tryptase > 20.0 ng/mL was indicative for severe anaphylaxis only in venom allergic subjects (29 patients; 4x grade 2 and 25x grade 3 anaphylaxis), but not in NSAID hypersensitive patients (6 patients; 4x grade 1, 2x grade 2).

Conclusions: In contrast to hymenoptera venom allergy, NSAID hypersensitivity do not seem to be associated with elevated basal serum tryptase levels and levels > 20 ng/mL were not related to increased severity of the clinical reaction. This suggests that mastocytosis patients may be treated with NSAID without special precautions.

Keywords: Anaphylaxis; Drug allergy; Drug reaction; Mastocytosis; Non-steroidal anti-inflammatory drug; Pseudo-allergy.

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