18th March 2024

A 54-year-old female presents to the emergency department with her partner who reports that she is lethargic

A 54-year-old female presents to the emergency department with her partner who reports that she is lethargic and confused. Five days prior, she received her first cycle of cyclophosphamide. A blood test reveals a sodium of 118. The last blood test before her cycle showed a sodium of 134. Which of the following is the most likely cause of her hyponatraemia?

Select the SINGLE most appropriate option from the list below. Select ONE option only.