Nocturia (ie, awakening to void one or more times per night) is common in adults, with increasing prevalence in older age. Nocturia is associated with increased risk of falls and fractures, cognitive impairment, and depressed mood. In general, mechanisms for nocturia fall into one of four categories: increased nighttime urine production, decreased storage ability, incomplete bladder emptying, or primary sleep disorder. Although screening for nocturia currently is not recommended, patients reporting bothersome symptoms should be evaluated and treated. Initial workup includes assessing urinary symptoms, fluid intake, and comorbidities. Using validated nocturia questionnaires and frequency-volume charts (bladder diaries) can aid in diagnosis. A urinalysis should be performed for all patients. Lifestyle modifications and treatment of underlying comorbidities are first-line therapies for nocturia. Limitation of fluid intake, especially in the evening; addressing timing of diuretic intake; and sleep hygiene are recommended. Pharmacotherapy should be reserved for those unresponsive to lifestyle modifications and adequate treatment of comorbidities. Pharmacotherapy should target the etiology of nocturia, such as nocturnal polyuria, overactive bladder, benign prostatic hyperplasia, and genitourinary syndrome of menopause. Patients with refractory symptoms should be referred for further treatment (eg, onabotulinumtoxinA injection, sacral neuromodulation, surgical management of benign prostatic hyperplasia).
Nocturia (ie, awakening to void during the night) is clinically significant if it occurs two or more times per night. It is common in adults, affecting more than 30% of those older than 60 years, with increasing prevalence in older age.1 Nocturia decreases quality of life, and the associated sleep disruption increases the risk of depression, cognitive impairment, and mortality.2,3 Awakening to void is associated with increased risk of falls and fractures. The direct health care cost of nocturia-related falls and injuries in the United States is estimated at $1.5 billion annually.4,5
WHAT'S NEW ON THIS TOPIC

| Awakening to void is associated with an increased risk of falls and fractures. The direct health care cost of nocturia-related falls and injuries in the United States is estimated at $1.5 billion annually. |
| Data show that intradetrusor onabotulinumtoxinA (Botox) injections and sacral neuromodulation are beneficial in the treatment of overactive bladder syndrome and nocturia. |
SORT: KEY RECOMMENDATIONS FOR PRACTICE

| Clinical recommendation | Evidence rating | Comments |
|---|---|---|
| A complete assessment of bladder symptoms, fluid intake, sleep habits, medical history, and symptoms of obstructive sleep apnea should be obtained in patients with nocturia.8,13,14 | C | Expert opinion and consensus guidelines |
| For patients with only nighttime urinary symptoms and no obvious medical comorbidities contributing to increased urine output, a frequency-volume chart (bladder diary) with sleep/wake times for 2 or 3 days should be completed.8,13,16 | C | Expert opinion and consensus guidelines; normative data on the definition of nocturnal polyuria is lacking, but it is historically defined as nocturnal urine output of > 33% of 24-hour urine volume in older patients or > 20% in younger patients17–19 |
| Initial treatment of nocturia includes conservative therapy and treatment of any contributing medical comorbidities.8,13 | C | Expert opinion and consensus guidelines |
| Pharmacotherapy for treatment of nocturia related to overactive bladder syndrome or benign prostatic hyperplasia can be considered as an adjunct to lifestyle interventions.8,13 | C | Expert opinion and consensus guidelines |
| Desmopressin is an effective treatment for nocturnal polyuria in patients with symptoms not responsive to conservative therapy.8,14,24,27,28 | A | Consistent evidence in randomized controlled trials and systematic review |
A = consistent, good-quality patient-oriented evidence; B = inconsistent or limited-quality patient-oriented evidence; C = consensus, disease-oriented evidence, usual practice, expert opinion, or case series. For information about the SORT evidence rating system, go to https://www.aafp.org/afpsort.
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