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Allergic adverse reactions to sulfonamides
Geneviève Choquet-Kastylevsky1, Thierry Vial, Jacques Descotes
1bioMérieux, Chemin de l'Orme, 69280 Marcy l'Etoile, France. genevieve.choquet@eu.biomerieux.com
Current Allergy and Asthma Reports
|March 16, 2002
Summary
Sulfonamides, while effective antimicrobials, can cause severe adverse drug reactions (ADRs) like skin issues and organ damage. Reactive metabolites are implicated in these allergic responses, especially in AIDS patients.
Area of Science:
- Pharmacology
- Immunology
- Toxicology
Background:
- Sulfonamides were the first effective antimicrobial agents but are now limited due to severe adverse drug reactions (ADRs).
- Skin reactions are the most common ADRs, ranging from rash to life-threatening toxidermias.
- Other significant ADRs include acute liver injury, pulmonary reactions, and blood dyscrasias.
Purpose of the Study:
- To explore the mechanisms behind sulfonamide-induced adverse drug reactions (ADRs).
- To understand the role of reactive metabolites in sulfonamide allergies.
- To investigate the increased risk of sulfonamide allergies in specific patient groups, such as those with AIDS.
Main Methods:
- Review of existing literature on sulfonamide pharmacology and toxicology.
- Analysis of the role of reactive metabolites, such as hydroxylamine and nitroso metabolites of sulfamethoxazole.
- Examination of metabolic and detoxification pathways in relation to allergic reactions.
Main Results:
- Reactive metabolites of sulfonamides, like sulfamethoxazole, can covalently bind to proteins, triggering adverse immune responses.
- Alterations in metabolic and detoxification pathways increase the risk of developing allergic reactions to sulfonamides.
- Sulfonamide allergies are more frequent in AIDS patients, though the underlying reasons remain unclear.
Conclusions:
- Reactive metabolites play a crucial role in the pathogenesis of sulfonamide-induced adverse drug reactions.
- Understanding these mechanisms is vital for managing sulfonamide hypersensitivity.
- Currently, no reliable tools exist to predict sulfonamide allergy risk, necessitating careful diagnosis and management, including potential desensitization.