About this trial
The purpose of the study is to evaluate whether Lemborexant is more effective than placebo in shortening sleep onset latency in patients with delayed sleep phase syndrome (both type 1 and type 2). This will be tracked using sleep logs as well as actigraphy.
In this 2-year study, the investigators will examine if Lemborexant administered 5-10 mg nightly taken at desired bedtime (at least 2 hours prior to self-reported sleep onset habitual time) can improve the symptoms of Delayed Sleep Phase Syndrome.
Eligibility criteria
Qualifiers
None
Disqualifiers
Clinically significant depression (PHQ-9 score of 10 or more), anxiety disorder (GAD- 7 score of 10 or more), substance use disorder, any other sleep disorder, or any medical disorder/therapy that could interfere with the trial
Use of medications with significant effects on sleep-wake function (insomnia therapies, stimulants)- unless they are discontinued at least 5 half-lives prior to study participation. Non-sedative antidepressants or SSRI will be allowed if at a stable dose in the absence of concomitant severe depression or severe anxiety.
Use of CYP3A inhibitors and CYP3A inducers, at least 1 week (or five half-lives, whichever is longer) prior to the first day of the baseline phase.
Pregnancy (verified by urine pregnancy test on visits 1, 2, and 3) or plan to become pregnant in the next 3 months or currently breastfeeding.
Trial design
Treatments tested in this trial
- Lemborexant
- Placebo
Treatment groups
Sponsors and collaborators
University of California, San Francisco
Lead sponsor
Eisai Co., Ltd.
Collaborator
Stanford University
Collaborator