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ALLERGY

Management Options for Patients with Aspirin and Nonsteroidal Antiinflammatory Drug Sensitivity

Drug Safety Pharmacist, Sunnybrook Health Sciences Centre, Department of Pharmacy and Drug Safety Clinic, Toronto, ON, Canada

Aaron M Drucker, BA

Summer Student, Sunnybrook Health Sciences Centre, Drug Safety Clinic, Toronto

Elizabeth A Weber, MD FRCPC

Clinical Specialist, Sunnybrook Health Sciences Centre, Drug Safety Clinic

Neil H Shear, MD FRCPC

Professor, Sunnybrook Health Sciences Centre, Department of Medicine, Division of Dermatology; Director, Drug Safety Clinic

Reprints: Ms. Knowles, Sunnybrook Health Sciences Centre, 2075 Bayview Ave., Toronto, ON M4N 3M5, Canada, fax 416/480-6025, sandra.knowles{at}sunnybrook.ca

OBJECTIVE: To evaluate and provide management strategies for patients with aspirin or nonselective nonsteroidal antiinflammatory drug (NSAID) sensitivity.

DATA SOURCES: Literature retrieval was accessed through MEDLINE (1966-March 2007) using the terms acetaminophen, aspirin, antiinflammatory agents nonsteroidal, urticaria, angioedema, asthma, leukotriene antagonists, desensitization, and tacrolimus. Article references retrieved were hand-searched for other relevant articles.

STUDY SELECTION AND DATA EXTRACTION: All studies published in English were evaluated. Studies, review articles, and commentaries on aspirin-induced asthma and aspirin- or NSAID-induced urticaria/angioedema were included in the review.

DATA SYNTHESIS: Aspirin sensitivity is most often manifested as respiratory reactions (eg, bronchospasm, profuse rhinorrhea, conjunctival injection) or urticaria/angioedema. The primary mechanism is believed to be inhibition of the cyclooxygenase 1 (COX-1) enzyme; as such, patients with aspirin sensitivity often display cross-reactions to nonselective NSAIDs that inhibit the COX-1 enzyme. Management strategies include avoidance of aspirin and cross-reacting nonselective NSAIDs. However, desensitization to aspirin is a viable option for patients with aspirin-induced respiratory reactions, especially for those who require aspirin for thromboembolic prophylaxis. Aspirin desensitization is maintained indefinitely with a daily aspirin dose. There is limited evidence of the use of leukotriene modifiers in preventing aspirin-induced asthma. COX-2 selective NSAIDs, especially in patients with aspirin-induced asthma, have not been found to cross-react. However, approximately 4% of patients with a history of aspirin-induced skin reactions may experience a cutaneous reaction following a challenge to a COX-2 selective NSAID. Since acetaminophen is a weak inhibitor of the COX-1 enzyme, patients with aspirin-induced asthma should not take more than 1000 mg of acetaminophen in a single dose.

CONCLUSIONS: Management of patients with aspirin/NSAID sensitivity includes avoidance of aspirin/nonselective NSAIDs, use of COX-2 selective NSAIDs, acetaminophen in doses less than 1000 mg, and desensitization. The role of leukotriene modifiers requires further study before they can be recommended for patients.

Key Words: aspirin, asthma, desensitization, urticaria

Published Online, July 3, 2007. www.theannals.com, DOI 10.1345/aph.1K023

THIS ARTICLE IS APPROVED FOR CONTINUING EDUCATION CREDIT
ACPE UNIVERSAL PROGRAM NUMBER: 407-000-07-018-H01