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In cases of severe methanol poisoning, hemodialysis is a common and effective treatment method. This procedure is vital because it helps to rapidly remove methanol and its toxic metabolites, such as formic acid, from the bloodstream. Methanol can cause serious metabolic acidosis and damage to the optic nerve, leading to vision loss or other severe complications.

Hemodialysis not only eliminates methanol but also helps to correct the metabolic acidosis that occurs as a result of the toxicity. It is typically utilized when other interventions, such as fomepizole or ethanol (which inhibit the enzyme that metabolizes methanol), are not sufficient to manage the patient's condition or if the methanol levels are particularly high.

Other treatment options may serve supportive roles, but they do not address the underlying issue as effectively as hemodialysis does in critical situations. Intravenous fluids may be given to maintain hydration and support kidney function, while activated charcoal is typically ineffective for methanol due to its rapid absorption and the necessity of urgent treatment. Thiamine administration is relevant in certain contexts, such as in alcohol withdrawal or to prevent Wernicke's encephalopathy, but it does not directly influence methanol toxicity.