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Related Experiment Videos

Cimetidine-associated optic neuropathy.

M A Sa'adah1, M Al Salem, A S Ali

  • 1Medical Department, Islamic Hospital, Amman, Jordan. islamic.hospital@index.com.jo

European Neurology
|July 8, 1999
PubMed
Summary
This summary is machine-generated.

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Cimetidine therapy can cause optic neuropathy, a condition affecting vision. Promptly withdrawing the drug upon visual changes is crucial for recovery, as demonstrated in two patient cases.

Area of Science:

  • Neuroscience
  • Ophthalmology
  • Pharmacology

Background:

  • Cimetidine, a widely used medication since 1976, has demonstrated central and peripheral nervous system toxicity.
  • While millions have used cimetidine, few adverse events, including optic neuropathy, have been documented.

Observation:

  • Two cases of optic neuropathy were observed in patients undergoing cimetidine therapy.
  • Both patients experienced visual recovery after discontinuing cimetidine.
  • The first patient experienced a recurrence of optic neuropathy upon reintroduction of cimetidine.

Findings:

  • Cimetidine is a known zinc chelator, and zinc deficiency is linked to optic neuropathy.
  • The study suggests cimetidine-induced optic neuropathy may result from its zinc-chelating properties.

Related Experiment Videos

  • A causal link between cimetidine and optic neuropathy is proposed, supported by clinical observations and a plausible mechanism.

    • Implications:

    • While routine ophthalmic monitoring may not be necessary, unexplained visual deterioration warrants immediate cimetidine withdrawal.
    • This finding highlights a potential neurotoxic effect of cimetidine, emphasizing the importance of monitoring for visual disturbances.
    • Understanding the mechanism of cimetidine toxicity can inform clinical practice and patient safety regarding this commonly prescribed medication.