This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Opioids and Alcohols, Subject name: Pharmacology
[{'content': 'The drug which is a specific inhibitor of the enzyme alcohol dehydrogenase and is useful in the treatment of methanol and ethylene glycol poisoning is: \nSelect and explain. \nA. Disulfiram, B. Ethylene glycol, C. Calcium leucovorin, D. Fomepizole', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Fomepizole (4-methylpyrazole) is a specific inhibitor of alcohol dehydrogenase and the drug of choice for methanol poisoning by retarding its metabolism. A loading dose of 15 mg/kg i.v. followed by 10 mg/kg every 12 hours till serum methanol falls below 20 mg/dl, has been found effective and safe. It has several advantages over ethanol, viz. longer t 1/2 and lack of inebriating action, but is not available commercially in India.', 'role': 'assistant'}]