ukmla MCQ (SBA): Paracetamol Overdose

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A 2-year-old boy is brought to the Emergency Department following ingestion of an unknown quantity of paracetamol liquid suspension approximately 3 hours ago. He is currently asymptomatic. His parents estimate he may have ingested significantly more than the therapeutic dose. What is the most important immediate investigation?

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ukmla MCQ: Paracetamol Overdose — Answer & Explanation | iatroX