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Proton pump inhibitors (PPIs) can cause visual hallucinations in some individuals. This case report details a patient who experienced hallucinations after starting omeprazole, which resolved upon discontinuation.

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Area of Science:

  • Neuroscience
  • Pharmacology
  • Gastroenterology

Background:

  • Proton pump inhibitors (PPIs) are widely used for gastroesophageal reflux disease (GERD).
  • Neuropsychiatric side effects from PPIs are infrequently reported but documented.
  • Understanding potential adverse drug reactions is crucial for patient safety.

Observation:

  • A 65-year-old male patient with no prior psychiatric history developed acute visual hallucinations.
  • Symptoms emerged shortly after initiating omeprazole for GERD.
  • Hallucinations ceased immediately upon omeprazole withdrawal and did not recur with famotidine.

Findings:

  • The case presents a clear temporal association between omeprazole use and the onset of visual hallucinations.
  • The absence of other psychotic symptoms (delusions, paranoia) points to a specific PPI-induced effect.
  • Resolution of symptoms upon drug cessation supports a causal link.

Implications:

  • This case highlights the potential for PPIs, specifically omeprazole, to induce neuropsychiatric symptoms like visual hallucinations.
  • It underscores the importance of considering medication side effects in patients presenting with new-onset psychosis.
  • Further research into the mechanisms of PPI-induced neuropsychiatric events is warranted.