Depression

Lemborexant for the Treatment of Residual Insomnia in Major Depressive Disorder (MDD)

Recruiting · Toronto, Ontario

✓ Study treatment at no cost✓ PHASE2

Always free

Study care at no cost to you

For your time and travel

Many studies pay you back

Most need no insurance or papers

Legal status usually isn't required; we'll tell you each study's requirements

Interpreters available

Ask for your language

Your choice

Voluntary — you can stop anytime

What is this study?

It is , overseen by an independent and licensed medical staff.

Read the full clinical description

The goal of this clinical trial is to learn if Lemborexant works to treat residual insomnia in adults with depression that is being treated. It will also learn about how practical, tolerable, and effective Lemborexant is. The main questions it aims to answer are: * Does Lemborexant help participants improve sleep and reduce insomnia symptoms? * How practical is it to use Lemborexant (how many participants join, drop out, and follow the study rules)? How do participants feel about using it (based on surveys and interviews)? Researchers will compare Lemborexant to a placebo (a look-alike substance that contains no drug) to see if Lemborexant works to treat residual insomnia in adequately treated major depressive disorder. Participants will: * Take Lemborexant or a placebo every day for 6 weeks (2 weeks at 5 mg then 4 weeks at 10 mg) * Complete clinical assessments and in-person study visits * Maintain a digital sleep diary and complete daily and weekly self-report ecological momentary assessments (EMAs) * Use a wearable device which will be used to collect and monitor physiological data

Who this study is looking for

In plain language, from the study's own rules. The study team confirms the full details with you — this isn't a final yes or no.

✅ You may be able to join if…

•Adults ages 18 to 70 with depression currently being treated
•Depression is confirmed, and there are no psychotic symptoms
•BMI between 19 and 30 (inclusive)
•Have ongoing insomnia symptoms (problems falling asleep and/or staying asleep) based on a sleep diary
•Must have a smartphone and internet access to complete questionnaires

🚫 You may not be able to join if…

•Anyone who is pregnant or breastfeeding
•Women who are not using an approved and effective method of contraception during the study
•People with certain psychiatric conditions or past psychotic symptoms (such as bipolar I/II, schizophrenia, schizoaffective disorder, or other psychotic symptoms)
•People with positive toxicology screening results
•People with other sleep disorders that explain insomnia (such as sleep apnea, restless legs syndrome, narcolepsy, or REM behavior disorder)

Are you a good fit?

Simplified highlights. The study team always confirms the full details with you.

✓Adults roughly 18–70
✓A BMI around 19 or higher
✓Have Obesity / overweight or Depression

!Some conditions may not be a fit: Heart / cardiovascular disease, High blood pressure
!Not for people who are pregnant or breastfeeding

What to expect, step by step

1
Usually a few weeks
The study team checks whether the study is a good fit for you, with a visit and sometimes lab tests. You can ask any questions before deciding.
2
Treatment
If you join and choose to continue, you receive the study treatment and are watched closely by medical staff.
3
Follow-up
After treatment, the team checks on your health and confirms the visit schedule with you. You can leave the study at any point.

Has this treatment been tested before?

Yes. This treatment has already been through earlier human studies for safety before reaching this stage.

What you need to know before you apply

What is this study testing?+

Is it safe? Who makes sure of that?+

This is a mid-stage study (Phase 2), looking at safety and whether the treatment works. Every study is reviewed and monitored by an independent ethics board (called an IRB) whose job is to protect participants, and care is overseen by licensed medical staff. You'll be told the known risks before you agree to anything, and you can stop at any time.

Will I get a placebo instead of the real treatment?+

Some studies compare a treatment against a placebo (an inactive version), and some don't. If this one does, the study team will explain your chances of receiving the active treatment before you decide. Nothing is hidden from you.

Do I have to stop taking my current medications?+

It depends on the study. Some let you stay on your current medications and some ask you to adjust them. Never stop a medication on your own — the study team will review everything with you first.

Does it cost anything? Will I be paid?+

The study treatment and study-related visits are provided at no cost to you. Some studies also pay for your time; the coordinator can tell you if this one does. You should never be asked to pay to take part.

Do I need insurance? Will anyone ask about my immigration status?+

No. You do not need health insurance to take part in a research study, and you will not be asked about your immigration status to join. Taking part is about whether you're a medical fit for the study.

What if English isn't my first language?+

You have the right to understand everything before you agree. Study sites can often provide materials or an interpreter in your language — you can ask the coordinator for one.

Is my information private?+

Yes. Your health information is only shared with the study sites you choose to be contacted by, and only to help match and enroll you. It is never sold, and you can ask us to delete it at any time.

Some requirements (like specific lab values or timing) are confirmed directly by the study team, not by us.

Source: ClinicalTrials.gov · NCT06843187 · Locations: Ontario