Management of Nocturia in Older Adults

Initial Assessment and Investigations

The European Association of Urology recommends completing a 72-hour bladder diary to determine nocturia severity, overnight urine volume, and whether nocturnal polyuria is present (>33% of 24-hour output occurring at night) 1, 2, 3
Blood tests, including electrolytes/renal function, thyroid function, calcium, and HbA1c, should be conducted to screen for metabolic and endocrine causes 1, 2
Urinalysis with urine albumin:creatinine ratio should be performed to assess for renal disease and rule out infection 1, 2
Blood pressure assessment, including lying and standing measurements, should be done to detect orthostatic hypotension suggestive of autonomic dysfunction 1, 4

Behavioral modifications, such as fluid management and sleep hygiene, should be implemented before any pharmacotherapy 1, 4
The European Urology Association suggests that mirabegron is generally preferred over antimuscarinics in patients over 80 due to its lower anticholinergic side effect profile and reduced risk of cognitive impairment 4, 5
Desmopressin can be used to reduce nocturnal urine production, but it carries a significant risk of hyponatremia in patients over 80 and requires careful monitoring of serum sodium 4

Frailty and life expectancy should guide treatment intensity and associated risks 4, 5
Fall risk is significantly increased with nocturia in older adults, and home safety should be addressed 4
Polypharmacy review is essential, as many medications can cause or worsen nocturia 1, 4
Cognitive impairment may be present, and it is essential to assess whether nocturia represents true bladder dysfunction versus sleep disorder with incidental voiding 5, 6

Patients should be referred to urology if symptoms persist despite optimal conservative management and appropriate pharmacotherapy, or if there are signs of underlying conditions such as hematuria or elevated post-void residual 3, 4, 5