Drug Overdose Management · Pharmacology

In the case of Ethylene Glycol or Methanol poisoning, why is Fomepizole administered?

  1. It accelerates the excretion of these alcohols
  2. It inhibits the enzyme Alcohol Dehydrogenase (ADH)
  3. It acts as a competitive substrate for Aldehyde Dehydrogenase
  4. It alkalinizes the urine to prevent crystal formation
Show answer and explanation

Correct answer: It inhibits the enzyme Alcohol Dehydrogenase (ADH)

Fomepizole inhibits alcohol dehydrogenase, the enzyme responsible for converting ethylene glycol and methanol into toxic metabolites like oxalic acid and formic acid. This prevents systemic acidosis and end-organ damage.

Difficulty: Medium Question 5 of 20

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