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Related Concept Videos

Drug Toxicity: Allergic Reactions01:30

Drug Toxicity: Allergic Reactions

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Drug-related allergies are immune-mediated responses triggered by the administration of pharmacological agents. These hypersensitivity reactions are classified based on the immune mechanisms involved. The four primary types—Type I, II, III, and IV—are mediated by different immunological pathways and exhibit distinct clinical manifestations.Type I Hypersensitivity/ IgE-Mediated Reactions: Immunoglobulin E (IgE) immediately mediates Type I hypersensitivity reactions. Upon initial...
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Allergic Drug Reactions01:27

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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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Allergic Reactions: Anaphylaxis01:30

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Anaphylaxis is a severe, life-threatening hypersensitivity reaction mediated by Immunoglobulin E (IgE) antibodies. When IgE binds to allergens, it triggers the release of mediators– histamine, leukotrienes, and prostaglandins from mast cells and basophils. These mediators cause vasodilation, edema, and inflammation, leading to various symptoms.The primary allergens causing anaphylaxis include food items (e.g., peanuts, shellfish), drugs (e.g., penicillin, asparaginase, corticotropin,...
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Antiasthma Drugs: Mast Cell Stabilizers and Anti-IgE Drugs01:25

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Asthma is a chronic respiratory condition for which new therapeutic avenues, including anti-inflammatory drugs like mast cell stabilizers and anti-IgE treatments, continue to be developed.
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Drug toxicity: Idiosyncratic Reactions01:16

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Idiosyncratic drug reactions represent abnormal chemical responses that vary significantly among individuals, ranging from extreme sensitivity to low doses to insensitivity to high doses. These reactions often occur due to the drug's covalent binding with serum proteins, forming a foreign hapten that triggers an immunotoxicological response. The variability in drug reactions has a strong pharmacogenetic foundation, with genetic differences crucial in how individuals metabolize drugs. For...
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Author Spotlight: Investigating the Pathophysiology of Eosinophilic Esophagitis
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Eosinophilic Drug Allergy.

Merin Kuruvilla1, David A Khan2

  • 1Department of Internal Medicine, Division of Allergy & Immunology, University of Texas Southwestern Medical Center, Dallas, TX, USA.

Clinical Reviews in Allergy & Immunology
|May 27, 2015
PubMed
Summary
This summary is machine-generated.

Eosinophilic drug reactions present diversely, from mild to life-threatening, challenging diagnosis and treatment. Understanding these varied presentations is crucial for effective management of drug-induced eosinophilia.

Keywords:
Aspirin-exacerbated respiratory diseaseDrug allergyDrug exanthemaDrug-reaction with eosinophilia and systemic symptoms (DRESS)EosinophiliaEosinophilic pneumonia

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Area of Science:

  • Immunology
  • Dermatology
  • Pharmacology

Background:

  • Peripheral or tissue eosinophilia can indicate drug eruptions but isn't always specific to medication causes.
  • Delayed drug hypersensitivity reactions, previously termed type IVb, involve complex pathophysiology with eosinophilic recruitment.
  • Eosinophilic drug reactions exhibit a wide spectrum of clinical presentations, ranging from benign to severe and life-threatening.

Purpose of the Study:

  • To review localized and systemic eosinophilic diseases induced by medications.
  • To discuss the pathophysiology, diagnosis, and management of various eosinophilic drug reactions.
  • To highlight the diagnostic challenges and potential severity of eosinophilic drug allergy.

Main Methods:

  • Literature review of eosinophilic drug reactions, including drug-reaction with eosinophilia and systemic symptoms (DRESS).
  • Analysis of factors implicated in DRESS pathogenesis, such as drug metabolites, HLA alleles, and viral reactivation.
  • Examination of diagnostic workup limitations and treatment options due to lack of controlled trials.

Main Results:

  • Eosinophilic drug reactions present heterogeneously, involving single organs (skin, lung) or multiple systems (DRESS).
  • Numerous factors contribute to DRESS pathogenesis, complicating diagnostic validation and treatment strategies.
  • Despite knowledge gaps, prompt recognition of potential severe reactions is essential for appropriate patient management.

Conclusions:

  • The diagnosis of eosinophilic drug allergy is challenging due to diverse clinical patterns.
  • While diagnostic tools and treatments are limited, awareness of severe reactions is critical.
  • Further research is needed to address knowledge deficits in eosinophilic drug-induced diseases.