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Allergic Drug Reactions

Allergic Drug Reactions

Allergic reactions related to drugs are hypersensitivity responses driven by the immune system and bear no connection to the drug's therapeutic action. While drugs in isolation do not trigger an immune response, they can interact with endogenous proteins to form antigens. These antigens stimulate lymphocytes to produce antibodies. IgE-type antibodies attach themselves to mast cells. Upon subsequent exposure to the same stimulus, the antigen-antibody interaction is initiated, unleashing...

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Related Experiment Video

Updated: May 31, 2025

Basophil Activation Test for Allergy Diagnosis

Basophil Activation Test for Allergy Diagnosis

Published on: May 31, 2021

Drug allergy.

Samira Jeimy¹, Tiffany Wong², Moshe Ben-Shoshan³

¹Division of Clinical Immunology and Allergy, Department of Medicine, Western University, London, ON, Canada. samira.jeimy@lhsc.on.ca.

Allergy, Asthma, and Clinical Immunology : Official Journal of the Canadian Society of Allergy and Clinical Immunology

|January 23, 2025

Summary

This summary is machine-generated.

Drug allergy, a type of adverse drug reaction (ADR), presents diverse symptoms making diagnosis difficult. Prompt diagnosis and management by an allergist are crucial for patient well-being and effective treatment.

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Last Updated: May 31, 2025

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Area of Science:

Clinical Immunology
Pharmacology
Allergy and Immunology

Background:

Drug allergy involves immunologically-mediated hypersensitivity reactions (HSRs) with varied clinical presentations.
Adverse drug reactions (ADRs) impact quality of life, delay treatment, and increase morbidity/mortality.
Diagnosis of drug allergy is challenging due to symptom diversity.

Purpose of the Study:

To provide a comprehensive overview of drug allergy.
To outline diagnostic strategies for suspected drug-induced allergic reactions.
To detail management approaches for common drug allergies.

Main Methods:

Review of existing literature on drug allergy diagnosis and management.
Emphasis on clinical history, physical examination, and diagnostic testing (skin, in vitro, drug challenges).
Discussion of therapeutic strategies including drug avoidance, substitution, and desensitization.

Main Results:

Accurate diagnosis relies on detailed patient history and targeted testing.
Drug avoidance is the primary management strategy.
Alternative medications and desensitization are key in specific scenarios.

Conclusions:

Referral to an allergist is recommended for suspected drug allergy.
Effective management involves accurate diagnosis, appropriate drug substitution, and consideration of cross-reactivity.
Specific treatments like epinephrine for anaphylaxis and desensitization are vital in critical cases.