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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...
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...
Hypersensitivity Reactions: Immune-Complex Reactions01:19

Hypersensitivity Reactions: Immune-Complex Reactions

Type III hypersensitivity reactions occur when antigen–antibody complexes form and activate the complement system. Normally, these complexes help the clearance of antigens by phagocytes and red blood cells. However, when large numbers of immune complexes are present, they can deposit in tissues—particularly in the walls of blood vessels—leading to inflammation and tissue injury. These deposits trigger complement activation and neutrophil recruitment, resulting in serum sickness, a systemic...
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...
Hypersensitivity Reactions: Cytolytic Reactions01:01

Hypersensitivity Reactions: Cytolytic Reactions

Type II hypersensitivity involves IgG and IgM antibodies targeting cell surface antigens, leading to cell destruction. This can occur through complement activation, antibody-dependent cell-mediated cytotoxicity (ADCC), or acting as opsonins for phagocytosis. When excessive, these reactions cause significant tissue damage.Drug-induced hemolytic anemia is a common example, where drugs like penicillin or cephalosporins bind to red blood cells, forming drug-protein complexes. These complexes...
Allergic Reactions02:06

Allergic Reactions

Overview

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Related Experiment Video

Updated: May 14, 2026

Contact Hypersensitivity as a Murine Model of Allergic Contact Dermatitis
08:25

Contact Hypersensitivity as a Murine Model of Allergic Contact Dermatitis

Published on: September 26, 2022

Hypersensitivity reaction probably induced by sugammadex.

Yoshinao Asahi1, Shiro Omichi, Seita Adachi

  • 1Department of Dentistry, Morinomiya Hospital, Osaka City, Japan. asahi@omichikai.or.jp

Acta Anaesthesiologica Taiwanica : Official Journal of the Taiwan Society of Anesthesiologists
|February 7, 2013
PubMed
Summary

A child with cerebral palsy experienced a severe hypersensitivity reaction to sugammadex, a muscle relaxant reversal agent. Prompt treatment with adrenaline and hydrocortisone was successful, highlighting the importance of recognizing this rare adverse event.

Related Experiment Videos

Last Updated: May 14, 2026

Contact Hypersensitivity as a Murine Model of Allergic Contact Dermatitis
08:25

Contact Hypersensitivity as a Murine Model of Allergic Contact Dermatitis

Published on: September 26, 2022

Area of Science:

  • Anesthesiology
  • Pharmacology
  • Pediatric Critical Care

Background:

  • Sugammadex is a reversal agent for neuromuscular blocking agents used in anesthesia.
  • Hypersensitivity reactions to sugammadex, though rare, can occur.
  • Cerebral palsy is a neurological disorder affecting movement and posture.

Observation:

  • A 7-year-old boy with cerebral palsy developed symptoms minutes after sugammadex administration.
  • Symptoms included upper airway stenosis, decreased oxygen saturation, and skin wheals.
  • The patient required immediate medical intervention.

Findings:

  • The clinical presentation was consistent with a hypersensitivity reaction to sugammadex.
  • The reaction manifested as respiratory compromise and dermatological signs.
  • The patient's condition improved rapidly following treatment.

Implications:

  • This case underscores the potential for sugammadex-induced hypersensitivity in pediatric patients.
  • Early recognition and prompt management are crucial for favorable outcomes.
  • Further investigation into the mechanisms and risk factors for sugammadex hypersensitivity may be warranted.