Acetaminophen is a topic covered in the Guide to Diagnostic Tests.

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Acetaminophen, serum (Tylenol; others)

10–20 mg/L [66–132 mcmol/L]

Panic: >50 mg/L



For suspected overdose, draw 2 samples at least 4 hrs apart, at least 4 hrs after ingestion. Note time of ingestion, if known. Order test stat.

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