Delusional infestation in Parkinson disease: a case report of medication-induced psychosis.

NeurocaseSep 7, 2026 (epub)
Case ReportNeurologyPsychiatry

Ali Zare Dehnavi, Jorge Patino, Kendra M Anderson et al.

✦ AI-curated · Sources linked

Case in brief

A 66-year-old woman with Parkinson disease developed visual and tactile delusions of a parasitic infestation while on dopaminergic therapy. Neuropsychological testing indicated largely preserved cognitive function, with mild weaknesses in processing speed and problem-solving. Her symptoms resolved after discontinuing amantadine, suggesting an iatrogenic cause linked to her medication.

Diagnostic / clinical pearl

Delusional infestation can occur in patients with Parkinson disease receiving dopaminergic medications, and may be reversible upon adjusting treatment.

Why it matters

This case emphasizes the need for neuropsychological assessment in patients with Parkinson disease experiencing psychosis, as it can aid in identifying medication-induced symptoms.

Source

PubMed · PMID 42703914

Published in Neurocase. This summary was written by xxcode from the publication's abstract and metadata. It is not peer reviewed and is not a substitute for the original article. For clinical decisions, review the original publication.

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