ABSTRACT
A 24-year-old man has been admitted to hospital with agitation and confusion. His flatmate called an ambulance because he was concerned that the man was withdrawing from g-hydroxybutyric acid (GHB), an illicit drug that he took regularly. The man used the drug hourly in the daytime and every 3 hours at night but had not used any in the past 24 hours. He was usually fit and well.
