Phenotype-guided management is key to treating nocturia in older patients

Nocturia is among the most difficult lower urinary tract symptoms to manage—not because effective interventions are lacking, but because the condition is inherently multifactorial and resists the single-cause, single-treatment paradigm that guides much of urologic practice, according to Kari A.O. Tikkinen, MD, PhD, who was interviewed at the 2026 American Urological Association Annual Meeting in Washington, DC.

Tikkinen opened by reframing how clinicians should think about nocturia in older patients. A single void per night may be normal and unbothersome, he noted, but as frequency increases so does both symptom burden and clinical significance. More importantly, nocturia in older patients should be understood as a marker of broader vulnerability.

"[Older] people who have nocturia are more likely to die—we know it from high-quality studies," he said. The symptom is not merely inconvenient; it signals systemic fragility.

The central reason nocturia remains undertreated, Tikkinen argued, is that clinicians often approach it as they would a simpler urologic condition.

"It's not like one pill and one cause and one solution—not at all," he said. "It's multifactorial in one patient, often multifactorial in many ways." The therapeutic implication is that effective management requires phenotyping before prescribing.

Tikkinen outlined 4 primary phenotypes that should guide the clinical work-up. The first is nocturnal polyuria—excess urine production during the night—which has numerous underlying causes that must be investigated before reaching for desmopressin. These include evening fluid or salt intake, diuretic timing, ankle edema causing overnight fluid redistribution from the third space, and medications such as amlodipine. Interventions as simple as compression stockings, leg elevation, or adjusting diuretic timing may resolve the symptom without pharmacotherapy.

The second phenotype is reduced bladder capacity, where urologic treatments are more directly applicable. The third is bladder outlet obstruction from prostatic disease—but Tikkinen urged caution here, particularly in older patients.

"There are a lot of unnecessary prostate surgeries for nocturia," he said, "because often it has nothing to do with it." In geriatric patients, he performs urodynamic studies before proceeding to prostate surgery to confirm that obstruction is actually present.

The fourth phenotype is sleep-driven nocturia, encompassing obstructive sleep apnea, heart failure, kidney disease, insomnia, and restless legs syndrome. Urologists do not need to manage these conditions directly, he emphasized, but they do need to recognize them and refer appropriately.

"Sometimes CPAP for sleep apnea really dramatically helps nocturia—but not always," he said.

Tikkinen acknowledged that the same patient may exhibit features of multiple phenotypes simultaneously, further complicating management. The breadth of contributing factors—spanning cardiology, nephrology, sleep medicine, and primary care—means that treating nocturia effectively often requires coordination across specialties rather than urologic intervention alone.