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Methylphenidate-induced visual hallucinations

M C Porfirio1, G Giana, S Giovinazzo

  • 1Department of Neuroscience, Child Neurology Unit, Tor Vergata University, Rome, Italy.

Neuropediatrics
|April 19, 2011
PubMed

Insights

Visual hallucinations are a rare side effect of methylphenidate (MPH) treatment for attention deficit/hyperactivity disorder (ADHD). This case highlights the importance of considering MPH as a potential cause for hallucinations in pediatric patients.

Area of Science:

  • Neuroscience
  • Pharmacology
  • Pediatrics

Background:

  • Attention deficit/hyperactivity disorder (ADHD) is a common neurodevelopmental disorder in children.
  • Methylphenidate (MPH) is a widely prescribed stimulant medication for managing ADHD symptoms.
  • Stimulant medications like MPH primarily work by increasing dopamine and norepinephrine levels in the brain.

Observation:

  • An 11-year-old boy diagnosed with ADHD experienced visual hallucinations.
  • These hallucinations emerged several years into his treatment with MPH.
  • The visual hallucinations ceased after MPH was discontinued.

Findings:

  • This case report documents a rare instance of toxic hallucinosis associated with therapeutic MPH doses.
  • The proposed mechanism involves a potential chronic increase in synaptic dopamine levels.
  • Hallucinations are an uncommon but possible adverse effect of MPH treatment.

Implications:

  • Clinicians prescribing MPH for ADHD should be vigilant for potential visual hallucinations.
  • Discontinuation of MPH may lead to the resolution of drug-induced hallucinations.
  • Further research into the neurobiological mechanisms underlying MPH-induced hallucinations is warranted.

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