21st May 2025

A 54-year-old woman with a past medical history of diabetes mellitus presents to the emergency department with complaints of nausea, vomiting, and confusion.

A 54-year-old woman with a past medical history of diabetes mellitus presents to the emergency department with complaints of nausea, vomiting, and confusion. On examination, she is found to have a serum sodium of 123 mmol/L.

Which of the following is false with regards to this hyponatraemia? Please select only ONE answer.