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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...
Antiasthma Drugs: Leukotriene Modifiers01:19

Antiasthma Drugs: Leukotriene Modifiers

Leukotriene modifiers, or cysteinyl leukotriene receptor antagonists, are medications used to manage chronic asthma. These agents target specific inflammatory mediators produced during arachidonic acid metabolism, an essential process in generating inflammation in the body.
Leukotriene modifiers work through two distinct mechanisms:
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 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
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...

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Related Experiment Video

Updated: Jun 23, 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

Lip plumper contact urticaria.

Elnaz F Firoz1, Joshua M Levin, Rachael D Hartman

  • 1Columbia College of Physicians and Surgeons, New York, New York, USA.

Journal of the American Academy of Dermatology
|April 25, 2009
PubMed
Summary

Lip plumpers can cause allergic reactions like contact urticaria, even in children. This study details a case and explores how these cosmetic products work and why people use them.

Area of Science:

  • Dermatology
  • Cosmetic Science

Background:

  • Lip plumpers are topical cosmetic agents recently introduced to enhance lip volume.
  • Their application aims to achieve increased lip size within minutes to days.

Observation:

  • A case of contact urticaria (allergic skin reaction) to a lip plumper was observed in a young male patient.
  • The reaction manifested as a hive-like rash upon application.

Findings:

  • The study identifies lip plumper contact urticaria as a potential adverse effect.
  • Mechanisms of action for lip plumpers involve ingredients that cause temporary swelling.
  • Sociocultural factors contribute to the increasing use of lip enhancement products.

Implications:

  • Healthcare providers should consider lip plumpers as a potential allergen in cases of unexplained lip or facial urticaria.

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  • Awareness of potential adverse reactions is crucial for consumers and manufacturers of cosmetic products.
  • Further research into the specific allergens in lip plumpers and long-term effects is warranted.