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15th February 2025
A 29-year-old man has been admitted overnight for pneumonia.
A 29-year-old man has been admitted overnight for pneumonia. In the morning, he becomes agitated and complains that the hospital food is causing him nausea and diarrhoea.
Past medical history includes allergic eczema, alcohol misuse and opioid misuse.
On examination, he is sweating profusely and pupil diameter is 9 mm bilaterally.
Which of the following investigations is most likely to confirm the diagnosis?
Select the SINGLE most appropriate option from the list below. Select ONE option only.
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