23rd May 2025

A 50-year-old female presents to her GP with fatigue, polyuria, polydipsia and nocturia.

A 50-year-old female presents to her GP with fatigue, polyuria, polydipsia and nocturia. She has a past medical history of bipolar disorder for which she takes lithium regularly. She was referred for a water deprivation test. 

What results would you expect to see from the water deprivation test?

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