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Case report
Cetirizine-induced psychosis in a young adult with erythema multiforme
  1. David Croitoru1,2,
  2. Stephanie G Brooks1,
  3. Vincent Piguet2,3 and
  4. Lindsey MacGillivray4,5
  1. 1Faculty of Medicine, University of Toronto, Toronto, Ontario, Canada
  2. 2Division of Dermatology, Department of Medicine, University of Toronto, Toronto, Ontario, Canada
  3. 3Department of Medicine, Women’s College Hospital, Toronto, Ontario, Canada
  4. 4Department of Psychiatry, University of Toronto, Toronto, Ontario, Canada
  5. 5Department of Psychiatry, University Health Network, Toronto, Ontario, Canada
  1. Correspondence to Dr David Croitoru; david.croitoru{at}utoronto.ca

Abstract

We describe a case of a young man, taking no other routine medications, presenting with erythema multiforme and cetirizine-induced psychosis with re-challenge evidence. On retrospective elicitation of history, it was found that he had been involved in a motor vehicle collision 4 months prior and was a daily cannabis user; there were no objective abnormalities by MRI and neurological evaluations. Although rare, cetirizine-induced psychosis is an important adverse drug reaction that warrants the attention of healthcare practitioners.

  • dermatology
  • drug interactions
  • psychiatry (drugs and medicines)
  • drugs: psychiatry

https://doi.org/10.1136/bcr-2020-241393

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    Footnotes

    • Contributors Clinical evaluation: DC, LM. Drafting: DC, SB. Revisions: LM, VP, DC.

    • Funding The authors have not declared a specific grant for this research from any funding agency in the public, commercial or not-for-profit sectors.

    • Competing interests None declared.

    • Patient consent for publication Obtained.

    • Provenance and peer review Not commissioned; externally peer reviewed.