Acute Careniche
A 26-year-old woman weighing 60 kg presents five hours after swallowing an unknown number of immediate-release paracetamol tablets. She is alert with normal observations and has vomited twice. The serum paracetamol concentration on the sample drawn four hours after ingestion is 2450 micromol/L. The alanine aminotransferase and the international normalised ratio are both normal. A decision has been made to start intravenous acetylcysteine now. Which one of the following acetylcysteine regimens should she be given?