Fomepizole is a medication primarily used as an antidote for poisoning caused by methanol and ethylene glycol. It works by inhibiting the enzyme alcohol dehydrogenase, which prevents the conversion of these toxic substances into harmful metabolites in the body. This drug is typically administered in a hospital setting, often through an intravenous (IV) line. Early treatment with fomepizole can significantly reduce the risk of serious complications and improve outcomes for patients who have ingested these toxic alcohols.