It is helpful to know the time of ingestion (and whether the overdose was staggered), the dose of paracetamol ingested and any other medications taken.
First stage (30 min to 24 hours): may be asymptomatic or may have nausea and vomiting.
Second stage (18 to 72 hours): right upper quadrant abdominal pain, hypotension.
Third stage (72 to 96 hours): liver failure, renal failure, coagulopathy, metabolic acidosis, encephalopathy, death is most common at this stage.
Fourth stage (4 days to 3 weeks): recovery high likely.
