A Phase 4 interventional study of Lemborexant tablets and Placebo in Nocturia, sponsored by University of Alberta. Not yet recruiting at 1 site in Canada. Open to participants aged 65 Years and older. Per ClinicalTrials.gov, last updated 2026-09-25.
Sponsored by University of Alberta · Phase 4, Interventional, and Other
Nocturia is defined by doctors as getting up one or more times a night to use the bathroom, where you were asleep before going to use the washroom and then going back to sleep afterward. People who experience this condition describe it was one of their biggest problems. This condition is very common as people get older and can seriously affect older peoples quality of life including disruptions to sleep, daily functioning, risk of falls and even early death.
Nocturia, defined by the International Continence Society (ICS) as the complaint of waking up one or more times per night to void, with each void typically preceded and followed by sleep (4,5). Nocturia is not only described as one of the most bothersome of all urinary symptoms, but also as one of the most prevalent, with devastating impacts on quality of life (QOL)(5,6). Although nocturia is relatively infrequent among young adults, especially young women (compared to young men), its prevalence tends to increase with age. In individuals aged 60 years or older, reported rates can reach as high as 70%, with over 36% reporting the need to wake up 2 or more times per night to void (7). A recently published meta-analysis reported associations between nocturia and risk of falls, fractures, and early mortality (8).
The causes of nocturia are complex and multifactorial, including nocturnal polyuria (NP - defined as excessive urine production during sleep), sleep disorders (such as insomnia, sleep apnea), metabolic conditions (such as diabetes, uncontrolled hypertension), bladder dysfunctions (OAB or BPE), lifestyle factors (fluid or alcohol intake), or a combination of these conditions (7,9,10).
In Canada, the increasing proportion of older adults, projected to constitute approximately 25% of the population by 2041, poses a notable public health concern owing to the association between nocturia and aging and the potential public health costs of managing the condition (11,12). Bothersome nocturia, defined clinically as two or more nightly voids, is more than just an inconvenience. It has notable clinical implications, including impaired cognitive function during the day, fatigue, falls, depression, and a considerable decrease in health-related quality of life (HRQOL), highlighting the need for new treatment approaches.
Rationale for the study:
The results of a recent study conducted with 32 insomnia patients with nocturia who typically awoke two or more times per night to void demonstrated that 4 weeks of once-daily 5mg Lemborexant significantly improved multiple clinical parameters related to sleep quality and nocturia (13). Nocturia frequency was significantly reduced from a mean of 3.4 episodes per night to 2.3 episodes (p\<0.001). Additionally, measures from the frequency-volume chart showed a significant increase in mean single voided urine volume at night from 182.5ml to 222.3 ml (p\<0.001). The mean duration of undisturbed sleep also increased from 105.3 minutes to 174.8 minutes (p \< 0.001), approaching the three-hour period of deep sleep vital for older adults. Participant quality of life, assessed by the Nocturia Quality of Life Questionnaire (N-QOL), significantly improved from 49.6% to 64.8% (p\<0.001).
This recent study, however, was a single-arm, uncontrolled, prospective study conducted at two centers in Japan. Its key limitations include the absence of a placebo control group, relatively small sample size (n=32), and a population limited to patients with comorbid insomnia (Athens Insomnia Scale ≥6).
The present study addresses some of these methodological gaps by employing a randomized, double-blind, placebo-controlled, crossover design with bothersome nocturia confirmed using a validated bother instrument (ICIQ-N), following a standardized period of conservative treatment. Conservative treatment will consist of individualized, physician-recommended measures, including fluid intake, leg elevation, sodium restriction, medication review, and the use of mild compression stockings where relevant.
Primary Objective:
The primary objective of this study is to assess the efficacy of Lemborexant (versus placebo) in reducing nocturia episodes in older men and women (≥65) with bothersome nocturia. Efficacy will be assessed as a change in mean nocturia episodes per 24 hours, measured using a 7-night bladder diary, between baseline and the end of study (EoS).
134 studies on the registry are indexed under Nocturia; 22 are open to participants now.
This study's planned enrollment of 35 is below the median of 71 across 108 interventional studies indexed under Nocturia.
Browse Nocturia studies →University of Alberta is the lead sponsor of 823 studies on the registry; 169 are open to participants now.
Of its 5 completed or terminated interventional studies of FDA-regulated products, 3 (60%) have results posted.
Counted across the registry records on this site, refreshed daily.
Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.
Exclusion Criteria:
Participant has a 24h polyuria (>3L), measured by a 7-day bladder diary
Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
The New York Heart Association’s four classes of how much heart failure limits physical activity.
Studies set their own limit — many outside heart failure leave out class III–IV, while heart failure studies may ask for a particular class. Check the class this study names.
GFR (glomerular filtration rate) is how much blood the kidneys filter each minute. It is usually estimated from a blood test — eGFR, by formulas such as CKD-EPI or MDRD — and some studies ask for it to be measured directly instead. Usually given in mL/min/1.73 m².
Check the method, the units and the minimum the study states. A value of 90 or above is in the normal-or-high range, but kidney damage can show in other tests too.
A score of how well the liver works in people with liver disease such as cirrhosis: class A is mild, B moderate and C severe.
CYP3A is a group of enzymes, mainly CYP3A4, in the liver and gut that break down many medicines. Some medicines, supplements and foods (grapefruit, St John’s wort) slow them down or speed them up, which changes how much of a study drug stays in the body.
Studies list them so they can be avoided or switched; bring a list of everything you take, including supplements.
NYHA class (heart failure)
The New York Heart Association’s four classes of how much heart failure limits physical activity.
Studies set their own limit — many outside heart failure leave out class III–IV, while heart failure studies may ask for a particular class. Check the class this study names.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
GFR and eGFR (kidney filtering)
GFR (glomerular filtration rate) is how much blood the kidneys filter each minute. It is usually estimated from a blood test — eGFR, by formulas such as CKD-EPI or MDRD — and some studies ask for it to be measured directly instead. Usually given in mL/min/1.73 m².
Check the method, the units and the minimum the study states. A value of 90 or above is in the normal-or-high range, but kidney damage can show in other tests too.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Child-Pugh class
A score of how well the liver works in people with liver disease such as cirrhosis: class A is mild, B moderate and C severe.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
CYP3A (CYP3A4) inhibitors and inducers
CYP3A is a group of enzymes, mainly CYP3A4, in the liver and gut that break down many medicines. Some medicines, supplements and foods (grapefruit, St John’s wort) slow them down or speed them up, which changes how much of a study drug stays in the body.
Studies list them so they can be avoided or switched; bring a list of everything you take, including supplements.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Lemborexant at bedtime for 6 weeks (5 mg weeks 1-3), optional uptitration to 10 mg (weeks 4-6), and then 2 week washout, then matching placebo for 6 weeks.
Drug: Lemborexant tablets
Matching placebo at bedtime for 6 weeks (1 tablet weeks 1-3, optional increase to 2 tablets weeks 4-6), then 2 week washout, then Lemborexant for 6 weeks
Drug: Placebo
5mg (one tablet) orally at bedtime for weeks 1-3, with optional uptitration to 10mg (two tablets) for weeks 4-6.
Also known as: Dayvigo
Matching placebo tablet, one at bedtime weeks 1-3, optionally two for weeks 4-6 to preserve masking
Change in mean nocturia episodes per 24 hours
Change in mean nocturia episodes per 24 hours, measured by a 7-day/night bladder diary between baseline and the end of each treatment period. Participants will record the time and volume of each void (day and night) for 7 consecutive days at baseline (prior to randomization) and at week 6 (the final treatment weeks: days 35-42) of each treatment period.
Time frame: 42 Days
Change in Epiworth Sleepiness Scale (ESS)
Change in Epiworth Sleepiness Scale between baseline and EoS. The Epworth Sleepiness Scale (ESS) is a self-administered questionnaire that assesses an individual's general level of daytime sleepiness by asking respondents to rate their likelihood of dozing in eight everyday situations. Scores range from 0 to 24, with higher scores indicating greater daytime sleepiness
Time frame: 42 days
Change in nocturia associated quality of life
Change in nocturia associated quality of life (ICIQ-NQoL) between baseline and EoS. The International Consolation on Incontinence Nocturia Quality of Life (ICIQ NQoL) is a validated, disease-specific, patient-reported outcome instrument developed to measure the impact of nocturia on health-related quality of life. The total score equals the sum of all item responses, ranging from 0 to 58, with higher values indicating a greater impact on patient quality of life.
Time frame: 42 days
Change in Insomnia Severity Index (ISI)
Change in Insomnia Severity Index (ISI) between baseline and EoS. The Incontinence Severity Index, developed by Sandvik and colleagues, is a validated instrument that quantifies the severity of urinary incontinence based on the frequency and amount of leakage. Scores are derived by multiplying responses on two items, yielding a severity category ranging from slight to severe.
Time frame: 42 days
Change in mean reported first uninterrupted sleep period (FUSP)
Change in mean reported first uninterrupted sleep period (FUSP) (minutes), measured over seven days, between baseline and EoS
Time frame: 42 days
Change in mean nocturia urinary frequency
Change in proportion of patients achieving mean nocturnal urinary frequency \<2, measured over seven days, between baseline and EoS
Time frame: 42 days
Change in patient self assessment of condition (PGI)
Change in patient self assessment of condition measured by the patient global impression of Change questionnaire assessed at baseline and EoS. The Patient Global Impression (PGI) Scale is a patient-reported outcome instrument that captures a patient's overall self-assessment of their condition's severity or change following treatment. It is available in two versions, PGI-Severity (PGI-S) and PGI-Improvement (PGI-I), used to assess current disease severity and perceived treatment response, respectively.
Time frame: 42 days
Patient reported adverse events
Number of treatment emergent adverse events, categorized according to MEdDRA terms, assessed at 3 weeks, 6 weeks and 2 weeks follow-up.
Time frame: 56 days
Plan to share: No
Start is estimated for Oct 2026; primary completion for Nov 2029, 37 months later.
How these figures are worked out, and which studies are left out of them.
From the registry record's own update history. This site started tracking changes on Sep 25, 2026; for anything earlier, see the record history on ClinicalTrials.gov ↗
This study is not yet recruiting, as verified in Sep 2026. You cannot join it, but the record below documents what was studied.
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Studies of the drug tested here: Lemborexant