Background: Repeated supratherapeutic ingestion (RSTI) of paracetamol can result in acute liver injury. Management guidelines vary worldwide and in Australia, acetylcysteine treatment is recommended in patients with a paracetamol concentration !20 mg/L and/or alanine transaminase (ALT) !50 U/L. Objectives: To investigate patients with RSTI of paracetamol and determine whether admission ALT <50 U/L rules out those who develop hepatotoxicity (ALT >1000 U/L). Method: Retrospective review of paracetamol RSTI presentations to two toxicology services over a four-year period. Patients were included if they ingested >4 g per 24 h of paracetamol for a period >8 h, regardless of intent. Data collected included demographics, ingestion history, pathology results, treatments and outcomes. Results: 266 patients were identified with median ingested dose of 9 g per 24 h (IQR: 6-12 g) over a median of 2 days (IQR: 1-5 days). On presentation, paracetamol was detected in 192 (72%), with median concentration of 14 mg/L
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