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Methanol intoxication: clinical features and differential diagnosis.

P F Suit1, M L Estes

  • 1Department of Pathology, Cleveland Clinic Foundation, Ohio 44195.

Cleveland Clinic Journal of Medicine
|July 1, 1990
PubMed
Summary

Methanol intoxication causes severe acidosis and visual damage. Early diagnosis and treatment, including 4-methylpyrazole, are crucial for preventing fatal outcomes from this toxic alcohol.

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Area of Science:

  • Toxicology
  • Emergency Medicine
  • Pharmacology

Background:

  • Methanol is a common industrial solvent and potential fuel source.
  • Accidental and intentional methanol ingestion can lead to severe toxicity, including metabolic acidosis and visual impairment.
  • Increasing industrial use and potential as a fuel source may lead to more methanol intoxication cases.

Purpose of the Study:

  • To review the pharmacology, clinical presentation, laboratory findings, and pathophysiology of methanol intoxication.
  • To discuss the differential diagnosis and treatment strategies for acute methanol poisoning.
  • To highlight the role of 4-methylpyrazole in managing methanol toxicity.

Main Methods:

  • Literature review of methanol intoxication.
  • Analysis of pharmacological properties, clinical manifestations, and laboratory data.
  • Discussion of diagnostic and therapeutic interventions.

Main Results:

  • Methanol intoxication results in severe metabolic acidosis and toxic metabolite accumulation (formate).
  • Clinical features include visual disturbances, central nervous system depression, and potential organ damage.
  • 4-methylpyrazole effectively inhibits alcohol dehydrogenase, preventing toxic metabolite formation.

Conclusions:

  • Prompt diagnosis and intervention are critical for improving outcomes in methanol intoxication.
  • Treatment strategies involve supportive care, fomepizole or ethanol administration, and potentially hemodialysis.
  • Understanding methanol's toxicology is essential for emergency physicians and toxicologists.

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