Drug allergy

Abstract Drug allergy encompasses a spectrum of immunologically-mediated hypersensitivity reactions (HSRs) with varying mechanisms and clinical presentations. This type of adverse drug reaction (ADR) not only affects patient quality of life, but may also lead to delayed treatment, unnecessary invest...

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Main Authors: Samira Jeimy, Tiffany Wong, Moshe Ben-Shoshan, Ana Maria Copaescu, Ghislaine A. C. Isabwe, Anne K. Ellis
Format: Article
Language:English
Published: BMC 2025-01-01
Series:Allergy, Asthma & Clinical Immunology
Online Access:https://doi.org/10.1186/s13223-024-00936-1
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author Samira Jeimy
Tiffany Wong
Moshe Ben-Shoshan
Ana Maria Copaescu
Ghislaine A. C. Isabwe
Anne K. Ellis
author_facet Samira Jeimy
Tiffany Wong
Moshe Ben-Shoshan
Ana Maria Copaescu
Ghislaine A. C. Isabwe
Anne K. Ellis
author_sort Samira Jeimy
collection DOAJ
description Abstract Drug allergy encompasses a spectrum of immunologically-mediated hypersensitivity reactions (HSRs) with varying mechanisms and clinical presentations. This type of adverse drug reaction (ADR) not only affects patient quality of life, but may also lead to delayed treatment, unnecessary investigations, and increased morbidity and mortality. Given the spectrum of symptoms associated with the condition, diagnosis can be challenging. Therefore, referral to an allergist experienced in the diagnosis and management of drug allergy is recommended if a drug-induced allergic reaction is suspected. Diagnosis relies on a careful history and physical examination and, in some instances, skin testing or in vitro testing and drug challenges. The most effective strategy for the management of allergist-confirmed drug allergy is avoidance or discontinuation of the offending drug. When available, alternative medications with unrelated chemical structures should be substituted. Cross-reactivity among drugs should also be taken into consideration when choosing alternative agents. Additional therapy for drug HSRs may include topical corticosteroids, oral antihistamines and, in severe cases, systemic corticosteroids and other immunomodulators. In the event of anaphylaxis, the treatment of choice is intramuscular epinephrine. If a patient with a history of anaphylaxis requires a specific drug and there is no acceptable alternative, desensitization to that drug may be considered. This article provides a background on drug allergy and strategies for the diagnosis and management of some of the most common drug-induced allergic reactions.
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spelling doaj-art-21147b8b1a104ac8b9168ba72fd6d5ce2025-01-26T12:38:33ZengBMCAllergy, Asthma & Clinical Immunology1710-14922025-01-0120S311710.1186/s13223-024-00936-1Drug allergySamira Jeimy0Tiffany Wong1Moshe Ben-Shoshan2Ana Maria Copaescu3Ghislaine A. C. Isabwe4Anne K. Ellis5Division of Clinical Immunology and Allergy, Department of Medicine, Western UniversityDivision of Allergy, Department of Pediatrics, The University of British ColumbiaDivision of Pediatric Allergy Clinical Immunology and Dermatology, Department of Pediatrics, McGill University Health CenterDivision of Allergy and Clinical Immunology, Department of Medicine, McGill University Health Centre (MUHC), McGill UniversityDivision of Allergy and Clinical Immunology, Department of Medicine, McGill University Health Centre (MUHC), McGill UniversityDivision of Allergy & Immunology, Department of Medicine, Queen’s UniversityAbstract Drug allergy encompasses a spectrum of immunologically-mediated hypersensitivity reactions (HSRs) with varying mechanisms and clinical presentations. This type of adverse drug reaction (ADR) not only affects patient quality of life, but may also lead to delayed treatment, unnecessary investigations, and increased morbidity and mortality. Given the spectrum of symptoms associated with the condition, diagnosis can be challenging. Therefore, referral to an allergist experienced in the diagnosis and management of drug allergy is recommended if a drug-induced allergic reaction is suspected. Diagnosis relies on a careful history and physical examination and, in some instances, skin testing or in vitro testing and drug challenges. The most effective strategy for the management of allergist-confirmed drug allergy is avoidance or discontinuation of the offending drug. When available, alternative medications with unrelated chemical structures should be substituted. Cross-reactivity among drugs should also be taken into consideration when choosing alternative agents. Additional therapy for drug HSRs may include topical corticosteroids, oral antihistamines and, in severe cases, systemic corticosteroids and other immunomodulators. In the event of anaphylaxis, the treatment of choice is intramuscular epinephrine. If a patient with a history of anaphylaxis requires a specific drug and there is no acceptable alternative, desensitization to that drug may be considered. This article provides a background on drug allergy and strategies for the diagnosis and management of some of the most common drug-induced allergic reactions.https://doi.org/10.1186/s13223-024-00936-1
spellingShingle Samira Jeimy
Tiffany Wong
Moshe Ben-Shoshan
Ana Maria Copaescu
Ghislaine A. C. Isabwe
Anne K. Ellis
Drug allergy
Allergy, Asthma & Clinical Immunology
title Drug allergy
title_full Drug allergy
title_fullStr Drug allergy
title_full_unstemmed Drug allergy
title_short Drug allergy
title_sort drug allergy
url https://doi.org/10.1186/s13223-024-00936-1
work_keys_str_mv AT samirajeimy drugallergy
AT tiffanywong drugallergy
AT moshebenshoshan drugallergy
AT anamariacopaescu drugallergy
AT ghislaineacisabwe drugallergy
AT annekellis drugallergy