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Related Experiment Videos

Delayed hypersensitivity reaction to paracetamol (acetaminophen)

M D Ibáñez1, E Alonso, M C Muñoz

  • 1Servicio de Alergia, Hospital Niño Jesus, Universidad Autonoma de Madrid, Spain.

Allergy
|February 1, 1996
PubMed
Summary
This summary is machine-generated.

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Paracetamol (acetaminophen) can cause delayed skin reactions in some individuals. These allergic contact dermatitis reactions were confirmed through patch tests and challenge tests in three patients.

Area of Science:

  • Dermatology
  • Allergology
  • Pharmacology

Background:

  • Paracetamol (acetaminophen) is a widely used analgesic and antipyretic.
  • Adverse drug reactions to paracetamol are typically associated with overdose, not hypersensitivity.
  • Delayed cutaneous reactions are less commonly reported adverse effects of paracetamol.

Observation:

  • Three patients presented with delayed skin eruptions following paracetamol administration.
  • Clinical presentation included eczematous lesions consistent with allergic contact dermatitis.
  • Reactions occurred days after paracetamol exposure and resolved upon drug withdrawal.

Findings:

  • Controlled oral challenge tests with paracetamol reproduced the cutaneous reactions in all three patients.
  • Positive patch tests to paracetamol confirmed specific sensitization.

Related Experiment Videos

  • Histopathological examination of a patch test lesion in one patient supported a diagnosis of delayed hypersensitivity.

    • Implications:

    • This study highlights paracetamol as a potential cause of allergic contact dermatitis.
    • Healthcare providers should consider paracetamol-induced hypersensitivity in patients with unexplained delayed skin reactions.
    • Further investigation into the immunologic mechanisms of paracetamol hypersensitivity is warranted.