A Study of Lemborexant in Chinese Participants With Insomnia Disorder

  • days left to enroll
  • participants needed
  • sponsor
    Eisai Co., Ltd.
Updated on 27 April 2022
wake after sleep onset
middle insomnia


The primary purpose of this study is to confirm using polysomnography (PSG) that lemborexant 10 milligram (mg) is superior to placebo on objective sleep onset as assessed by latency to persistent sleep (LPS) during the last 2 nights of 1 month of treatment in participants with insomnia disorder.


The study will have 2 phases: the Prerandomization Phase and the Randomization Phase. The Prerandomization Phase will comprise 3 periods that will last up to a maximum of 35 days: a Screening Period, a Run-in Period, and a Baseline Period. The Randomization Phase will comprise a Treatment Period during which participants will be treated for 30 nights (1 month) and a minimum 14-day Follow-up Period before an End of Study (EOS) Visit (up to 54 days). The total study duration for each participant on this study is 89 days.

Condition Sleep Initiation and Maintenance Disorders
Treatment Placebo, Lemborexant
Clinical Study IdentifierNCT04549168
SponsorEisai Co., Ltd.
Last Modified on27 April 2022


Yes No Not Sure

Inclusion Criteria

Participants must meet all of the following criteria to be included in this
Chinese male or female, age 18 years or older, at the time of informed consent (in Taiwan only participants with age 20 years or older are eligible)
Meets the Diagnostic and Statistical Manual of Mental Disorders, Fifth Edition (DSM-5) criteria for Insomnia Disorder, as follows
Complains of dissatisfaction with night time sleep, in the form of difficulty staying asleep and/or awakening earlier in the morning than desired despite adequate opportunity for sleep
Frequency of complaint greater than or equal to (>=) 3 times per week
Duration of complaint >=3 months
Associated with complaint of daytime impairment
At Screening: History of sSOL >=30 minutes on at least 3 nights per week in the
At Screening: Reports regular time spent in bed, either sleeping or trying to sleep, between 7 and 9 hours
previous 4 weeks and/or sWASO >=60 minutes on at least 3 nights per week in
At second Screening Visit (Visit 2a) and Run-in Visit (Visit 3a): Sleep diary confirms regular bedtime, defined as the time the participant attempts to sleep, between 21:00 and 01:00 on at least 5 of the final 7 nights and regular waketime, defined as the time the participant gets out of bed for the day, between 05:00 and 10:00 on at least 5 of the final 7 nights
the previous 4 weeks
At Screening and Baseline: ISI score >=15
Confirmation of current insomnia symptoms, as determined from responses on the sleep diary on the 7 most recent mornings before the first PSG during Screening Period (Visit 2a) and Run-in visit (Visit 3a), such that sSOL >=30 minutes on at least 3 of the 7 nights and/or sWASO >=60 minutes on at least 3 of the 7 nights
At the second Screening Visit (Visit 2a) and the Run-in visit (Visit 3a): Confirmation of sufficient duration of time spent in bed, as determined from responses on the sleep diary on the 7 most recent mornings before the Visit, such that there are no more than 2 nights with time spent in bed duration less than (<) 7 hours or greater than (>) 10 hours
During the Run-in Period, objective (PSG) evidence of insomnia as follows
LPS average >=30 minutes on the 2 consecutive Baseline PSGs, with neither night <20 minutes and/or
WASO average >=60 minutes on the two consecutive Baseline PSGs, with neither night <45 minutes
Willing not to start a behavioral or other treatment program for the treatment of insomnia during the participant's participation in the study
Willing and able to comply with all aspects of the protocol, including staying in bed
for at least 7 hours each night

Exclusion Criteria

Participants who meet any of the following criteria will be excluded from this
Females who are breastfeeding or pregnant at Screening or Baseline (as documented by a positive beta-human chorionic gonadotropin test). A separate baseline assessment is required if a negative screening pregnancy test was obtained more than 72 hours before the first dose of study drug
Females of childbearing potential who: Within 28 days before study entry, did not use a highly effective method of contraception, which includes any of the following
total abstinence (if it is their preferred and usual lifestyle)
an intrauterine device or intrauterine hormone-releasing system
a contraceptive implant
an oral contraceptive (participant must be on a stable dose of the same oral contraceptive product for at least 28 days before dosing and throughout the study and for 28 days after study drug discontinuation)
have a vasectomized partner with confirmed azoospermia
do not agree to use a highly effective method of contraception (as described above) throughout the entire study period and for 28 days after study drug discontinuation It is permissible that if a highly effective method of contraception is not appropriate or acceptable to the participant, then the participant must agree to use a medically acceptable method of contraception, that is, double-barrier methods of contraception such as latex or synthetic condom plus diaphragm or cervical/vault cap with spermicide NOTE: All females will be considered to be of childbearing potential unless they are postmenopausal (amenorrheic for at least 12 consecutive months, in the appropriate age group, and without other known or suspected cause) or have been sterilized surgically (that is, bilateral tubal ligation, total hysterectomy, or bilateral oophorectomy, all with surgery at least 1 month before dosing)
A prolonged corrected QT interval by Fredericia's formula (QTcF) interval (QTcF >450 millisecond [ms]) as demonstrated by a repeated electrocardiogram. A history of risk factors for torsade de pointes (for example, heart failure, hypokalemia, family history of long QT Syndrome) or the use of concomitant medications that prolonged the QTcF interval
Any suicidal ideation with intent with or without a plan at Screening or within 6 months of Screening
Any suicidal behavior in the past 10 years
Any history of a medical or psychiatric condition that in the opinion of the
Evidence of clinically significant disease (for example, cardiac; respiratory including chronic obstructive pulmonary disease, acute and/or severe respiratory depression; gastrointestinal; moderate and severe hepatic impairment; renal including severe renal impairment; neurological including myasthenia gravis; psychiatric disease; or malignancy within the past 5 years other than adequately treated basal cell carcinoma) or chronic pain that in the opinion of the investigator(s) could affect the participant's safety or interfere with the study assessments. Participants for whom a sedating drug would be contraindicated for safety reasons because of the participant's occupation or activities are also excluded
investigator(s) could affect the participant's safety or interfere with the
Hypersensitivity to lemborexant or to their excipients
study assessments
Scheduled for surgery during the study
Known to be human immunodeficiency virus positive
Active viral hepatitis (B or C) as demonstrated by positive serology
History of drug or alcohol dependency or abuse within approximately the last 2 years
A current diagnosis of sleep-related breathing disorder including obstructive sleep apnea (with or without continuous positive airway pressure treatment), periodic limb movement disorder, restless legs syndrome, circadian rhythm sleep disorder, or narcolepsy, or an exclusionary score on screening instruments to rule out individuals with symptoms of certain sleep disorders other than insomnia as follows
Snoring, Tiredness, Observed apnea, high blood Pressure (STOP)-Body mass index (BMI), Age, Neck circumference, and Gender (BANG) score >=5
International Restless Legs Scale score >=16
Reports symptoms potentially related to narcolepsy, that in the clinical opinion of the investigator indicates the need for referral for a diagnostic evaluation for the presence of narcolepsy
Reports a history of sleep-related violent behavior, or sleep driving, or any other complex sleep-related behavior (for example, making phone calls or preparing and eating food while sleeping)
For participants who underwent diagnostic PSG within 1 year before informed consent
Age 18 to 64 years: Apnea Hypopnea Index >=10, or Periodic Limb Movements with Arousal Index >=10
Age >=65 years: Apnea Hypopnea Index >15, or Periodic Limb Movements with Arousal Index >15
Apnea-hypopnea Index >15 or Periodic Limb Movement with Arousal Index >15 as measured
on the PSG at the second Screening Visit
Beck Depression Inventory-II score >19 at Screening
Beck Anxiety Inventory score >15 at Screening
Habitually naps during the day more than 3 times per week
Excessive caffeine use that in the opinion of the investigator contributes to the participant's insomnia, or habitually consumes caffeine containing beverages after 18:00 and is unwilling to forego caffeine after 18:00 for the duration of his/her participation in the study. Participants are excluded if, in the previous 3 months, they had symptoms that would meet DSM-5 criteria for caffeine intoxication, which includes consumption of a high dose of caffeine (significantly in excess of 250 mg) and >=5 of the following symptoms: restlessness, nervousness, excitement, insomnia, flushed face, diuresis, gastrointestinal disturbance, muscle twitching, rambling flow of thought and speech, tachycardia or cardiac arrhythmia, periods of high energy, or psychomotor agitation. To be exclusionary, those symptoms must cause distress or impairment in social, occupational and other forms of functioning, and not be associated with other substance, mental disorder or medical condition
Reports habitually consuming more than 14 drinks containing alcohol per week (females) or more than 21 drinks containing alcohol per week (males), or unwilling to limit alcohol intake to no more than 2 drinks per day or forego having alcohol within the 3 hours before bedtime for the duration of his/her participation in the study
Excluding comorbid nocturia that is causing or exacerbating the insomnia
Used any prohibited prescription or over-the-counter concomitant medications within 1 week or 5 half-lives, whichever is longer, before the first dose of study medication (Run-in Period)
Used any modality of treatment for insomnia, including cognitive behavioral therapy or marijuana within 1 week or 5 half-lives, whichever is longer, before the first dose of study medication (Run-in Period)
Failed treatment with dual orexin receptor antagonist drugs (efficacy and/or safety) following treatment with an appropriate dose and of adequate duration in the opinion of the investigator
Transmeridian travel across more than 3 time zones in the 2 weeks before Screening, or between Screening and Baseline, or plans to travel across more than 3 time zones during the study (China mainland will be considered as 1 time zone)
A positive drug test at Screening, Run-in, or Baseline, or unwilling to refrain from use of recreational drugs during the study
Currently enrolled in another clinical trial or used any investigational drug or device within 30 days or 5 half-lives, whichever is longer preceding informed consent
Previously participated in any clinical trial of lemborexant
Clear my responses

How to participate?

Step 1 Connect with a study center
What happens next?
  • You can expect the study team to contact you via email or phone in the next few days.
  • Sign up as volunteer to help accelerate the development of new treatments and to get notified about similar trials.

You are contacting

Investigator Avatar

Primary Contact



Additional screening procedures may be conducted by the study team before you can be confirmed eligible to participate.

Learn more

If you are confirmed eligible after full screening, you will be required to understand and sign the informed consent if you decide to enroll in the study. Once enrolled you may be asked to make scheduled visits over a period of time.

Learn more

Complete your scheduled study participation activities and then you are done. You may receive summary of study results if provided by the sponsor.

Learn more

Similar trials to consider


Browse trials for

Not finding what you're looking for?

Every year hundreds of thousands of volunteers step forward to participate in research. Sign up as a volunteer and receive email notifications when clinical trials are posted in the medical category of interest to you.

Sign up as volunteer

user name

Added by • 



Reply by • Private

Lorem ipsum dolor sit amet consectetur, adipisicing elit. Ipsa vel nobis alias. Quae eveniet velit voluptate quo doloribus maxime et dicta in sequi, corporis quod. Ea, dolor eius? Dolore, vel!

  The passcode will expire in None.

No annotations made yet

Add a private note
  • abc Select a piece of text from the left.
  • Add notes visible only to you.
  • Send it to people through a passcode protected link.
Add a private note