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Related Concept Videos

Drug Toxicity: Allergic Reactions01:30

Drug Toxicity: Allergic Reactions

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 exposure to a...
Allergic Drug Reactions01:27

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 numerous...
Allergic Reactions: Anaphylaxis01:30

Allergic Reactions: Anaphylaxis

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, heparin),...
Allergic Reactions02:06

Allergic Reactions

Overview
Hypersensitivities01:30

Hypersensitivities

Hypersensitivity, also known as a hypersensitivity reaction or allergic reaction, is a condition where the body's immune system reacts abnormally to a foreign substance. Such substances, that cause hypersensitivity are referred to as an allergen, could be something typically harmless to most people, like pollen or certain foods.
Types of Hypersensitivities
Hypersensitivity reactions are categorized into four types: Type 1, Type 2, Type 3, and Type 4. Each type has a distinct mechanism...
Drug Toxicity: Overview01:00

Drug Toxicity: Overview

Drug toxicity quantifies the harm a compound causes to an organism, varying by dose and potentially impacting whole systems or specific organs like the liver. Toxic reactions may arise from venomous insect or spider bites, with effects ranging from mild symptoms to severe outcomes such as brain damage or death. Common forms of acute poisoning include ethanol intoxication and overdose of pain or fever medications, with substances like GHB and heroin being particularly lethal at doses close to...

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Related Experiment Video

Updated: Jul 8, 2026

Basophil Activation Test for Investigation of IgE-Mediated Mechanisms in Drug Hypersensitivity
10:22

Basophil Activation Test for Investigation of IgE-Mediated Mechanisms in Drug Hypersensitivity

Published on: September 16, 2011

[Atopy and drug allergy].

N Despotović, I Bojović, S Paranos

    Srpski Arhiv Za Celokupno Lekarstvo
    |January 1, 1994
    PubMed
    Summary

    Atopy is not a significant predisposing factor for drug allergies. While many patients report drug allergies, clinical testing confirms allergies in only 40%, with anaphylaxis showing the highest predictive value.

    Area of Science:

    • Clinical immunology
    • Pharmacology
    • Allergology

    Context:

    • Investigating the relationship between atopy and drug allergies.
    • Assessing the predictive value of clinical manifestations in drug allergy diagnosis.
    • Evaluating diagnostic accuracy for reported drug allergies.

    Purpose:

    • To determine if atopy correlates with drug allergy.
    • To identify clinical signs of drug allergy with predictive value.
    • To verify reported drug allergies through diagnostic testing.

    Summary:

    • 150 patients with suspected drug allergies underwent testing.
    • Drug allergy confirmed in 40% of patients; atopy present in 12%.
    • Anaphylaxis (76%) and urticaria (47%) showed significant drug allergy prevalence.

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    Last Updated: Jul 8, 2026

    Basophil Activation Test for Investigation of IgE-Mediated Mechanisms in Drug Hypersensitivity
    10:22

    Basophil Activation Test for Investigation of IgE-Mediated Mechanisms in Drug Hypersensitivity

    Published on: September 16, 2011

    Basophil Activation Test for Allergy Diagnosis
    07:22

    Basophil Activation Test for Allergy Diagnosis

    Published on: May 31, 2021

    A Mouse Ear Model for Allergic Contact Dermatitis Evaluation
    08:02

    A Mouse Ear Model for Allergic Contact Dermatitis Evaluation

    Published on: March 24, 2023

    Impact:

    • Highlights discrepancies between reported and confirmed drug allergies.
    • Identifies anaphylaxis and urticaria as key indicators of drug allergy.
    • Informs diagnostic strategies for suspected drug hypersensitivity.