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[Course_feedback]
What is the next most useful ED investigation?
Her VBG sodium is 118mmol/L (normal 135-145mmol/L), with her other blood results (including thyroid function and cortisol) unremarkable. She is clinically euvolaemic. Her serum osmolality is 255mOsm/kg (normal 275-295mOsm/kg). Her urine osmolality is 425mOsm/kg. A spot urinary sodium is 45mmol/L.
What treatment will you advise?
While you are reviewing her, she develops a generalised tonic-clonic seizure. What drug option will you administer?