Clinical trial Recruiting at 67 sites Phase 3 Interventional Ages 18 to 74

Testing seltorexant for treating major depression with insomnia symptoms

Official title: A Two-Part Multicenter, Double-Blind, Randomized Placebo-Controlled Study to Evaluate Efficacy and Safety and the Maintenance of Effect of 20-(Milligram) mg Seltorexant as Adjunctive Therapy to Antidepressants in Adult and Elderly Patients With Major Depressive Disorder With Insomnia Symptoms

Run by Janssen Research & Development, LLC · NCT06559306 · Data updated 2026-11-12

This study is testing if adding a new medication called seltorexant can help adults and older people with major depression and insomnia feel better when their current antidepressants aren't enough.

Quick facts

PhasePhase 3
Study typeInterventional
Ages18 Years to 74 Years
SexAll
Enrollment752 (estimated)
SponsorJanssen Research & Development, LLC
Industry-sponsored
Locations205 sites (Birmingham, Alabama and 204 other locations)
StatusRecruiting
StartedJuly 25, 2024
Main results expectedDecember 30, 2026
Study endsMay 4, 2029
Registry record updatedNovember 3, 2026
Trial IDNCT06559306 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Ideal candidates are adults and elderly individuals diagnosed with major depressive disorder who have not adequately responded to previous antidepressant treatments.

Probably not a fit

Patients who have not been diagnosed with major depressive disorder or those who have not tried any antidepressant medications may not benefit from this study.

A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.

What this trial studies

This phase 3 study evaluates the effectiveness and safety of seltorexant as an additional treatment for adults and elderly patients suffering from major depressive disorder (MDD) with insomnia symptoms. Participants must have previously shown inadequate response to one or two antidepressants, specifically SSRIs or SNRIs. The study compares the effects of seltorexant against a placebo while participants continue their current antidepressant therapy. The goal is to determine if seltorexant can improve depressive symptoms and provide better management of insomnia.

Why it matters

Potential benefit: If successful, this treatment could significantly improve the quality of life for patients with major depressive disorder and insomnia symptoms.

How similar studies have gone: Other studies have explored adjunctive treatments for depression, but the specific use of seltorexant in this context is relatively novel.

Who can join: the full rules

Show full inclusion / exclusion criteria
Inclusion Criteria:

Participants in part 1 and direct enrollers to part 2:

* Meet DSM-5 MDD, without psychotic features based upon clinical assessment and confirmed by the structured clinical interview for DSM-5 Axis I disorders-clinical trials version (SCID-CT) diagnosed with first depressive episode prior to age 60
* Have had an inadequate response to at least 1 but no more than 2 antidepressants, administered at an adequate dose and duration in the current episode of depression. An inadequate response is defined as less than (\<) 50% reduction but with some improvement (that is, improvement greater than \[\>\] 0%) in depressive symptom severity with residual symptoms other than insomnia present, and overall good tolerability, as assessed by the MGH-ATRQ, and this must include the participant's current antidepressant treatment
* Is receiving and tolerating well any one of the following SSRI or SNRI for depressive symptoms at screening, in any formulation and available in the participating country: citalopram, duloxetine, escitalopram, fluvoxamine, fluoxetine, milnacipran, levomilnacipran, paroxetine, sertraline, venlafaxine, desvenlafaxine, vilazodone, or vortioxetine at a stable dose (at therapeutic dose level) for at least 6 weeks
* Having a major depressive episode of at least moderate severity, as assessed with 17-item Hamilton Depression Rating Scale, implemented through the Structured Interview Guide (SIGH-D) in a blinded manner at screening and must not demonstrate a clinically significant improvement from the beginning to end of screening.

Participants entering after completing part 1:

* Must have completed Part 1 DB treatment phase
* Can consistently tolerate study drug (at the end of Part 1), and there is no additional safety risk for the participant if they proceed to Part 2
* Was able to consistently follow the study procedures in Part 1 as judged by the investigator.
* Must be medically stable based on clinical laboratory tests

Exclusion Criteria:

* Has a recent (last 3 months) history of, or current signs and symptoms of, severe renal insufficiency clinically significant or unstable cardiovascular, respiratory, gastrointestinal, neurologic, hematologic, rheumatologic, immunologic or endocrine disorders and uncontrolled Type 1 or Type 2 diabetes mellitus
* Has a history of narcolepsy and seizures
* Has current signs/symptoms of hypothyroidism or hyperthyroidism
* Participants taking thyroid supplementation for antidepressant purposes
* Has Cushing's disease, Addison's disease, primary amenorrhea, or other evidence of significant medical disorders of the HPA axis

Where it's running

  • University of Arizona
    Tucson, Arizona, United States
    Recruiting
  • SanRo Clinical Research Group LLC WCG Clinical Network
    Bryant, Arkansas, United States
    Recruiting
  • PAMOJA Clinical Institute LLC
    Anaheim, California, United States
    Recruiting
  • Axiom Research
    Colton, California, United States
    Recruiting
  • Behavioral Research Specialists LLC
    Glendale, California, United States
    Recruiting
  • Excell Research Inc
    Oceanside, California, United States
    Recruiting
Show 44 more locations
  • Anderson Clinical Research
    Redlands, California, United States
    Recruiting
  • Lumos Clinical Research Center LLC
    San Jose, California, United States
    Recruiting
  • Mountain View Clinical Research
    Denver, Colorado, United States
    Recruiting
  • UConn Health Center
    Farmington, Connecticut, United States
    Recruiting
  • Clinical Research of Brandon
    Brandon, Florida, United States
    Recruiting
  • Nuovida Research Center
    Miami, Florida, United States
    Recruiting
  • Psych Me Medical Research Inc
    Tampa, Florida, United States
    Recruiting
  • Interventional Psychiatry of Tampa Bay
    Tampa, Florida, United States
    Recruiting
  • Health Synergy Clinical Research
    West Palm Beach, Florida, United States
    Recruiting
  • Agile Clinical Research Trials, LLC
    Atlanta, Georgia, United States
    Recruiting
  • Northwestern University
    Chicago, Illinois, United States
    Recruiting
  • Baber Research Group
    Naperville, Illinois, United States
    Recruiting
  • Adams Clinical LLC
    Watertown, Massachusetts, United States
    Recruiting
  • Integrative Clinical Trials LLC
    Brooklyn, New York, United States
    Recruiting
  • SPRI Clinical Trials, LLC
    Brooklyn, New York, United States
    Recruiting
  • Bioscience Research LLC
    Mount Kisco, New York, United States
    Recruiting
  • Fieve Clinical Research Inc
    New York, New York, United States
    Recruiting
  • Patient Priority Clinical Sites LLC
    Cincinnati, Ohio, United States
    Recruiting
  • The Ohio State University
    Columbus, Ohio, United States
    Recruiting
  • Conrad Clinical Research
    Edmond, Oklahoma, United States
    Recruiting
  • University of Pennsylvania
    Philadelphia, Pennsylvania, United States
    Recruiting
  • Clinical Trials of South Carolina
    Charleston, South Carolina, United States
    Recruiting
  • Houston Clinical Trials LLC
    Bellaire, Texas, United States
    Recruiting
  • North Texas Clinical Trials
    Fort Worth, Texas, United States
    Recruiting
  • Baylor College of Medicine
    Houston, Texas, United States
    Recruiting
  • Grayline Research Center
    Wichita Falls, Texas, United States
    Recruiting
  • Core Clinical Research
    Everett, Washington, United States
    Recruiting
  • Medipa S R O
    Brno, Czechia
    Recruiting
  • Clintrial s r o
    Prague, Czechia
    Recruiting
  • Neuropsychiatrie Petrska sro
    Prague, Czechia
    Recruiting
  • Medical Services Prague S R O
    Prague, Czechia
    Recruiting
  • Ketamine Mexico S de RL de C V
    Mexico City, Mexico
    Recruiting
  • Gabipros SC
    Mexico City, Mexico
    Recruiting
  • Instituto de Informacion e Investigacion en Salud Mental A.C.
    Monterrey, Mexico
    Recruiting
  • Hospital Universitario Dr Jose Eleuterio Gonzalez
    Nuevo León, Mexico
    Recruiting
  • Hospital Lomas de San Luis Internacional
    San Luis de Potosi, Mexico
    Recruiting
  • Osrodek Badan Klinicznych CLINSANTE S C Ewa Galczak Nowak Malgorzata Trzaska
    Bydgoszcz, Poland
    Recruiting
  • PROMENTE Sp. z o.o.
    Bydgoszcz, Poland
    Recruiting
  • Centrum Zdrowia Alcea
    Gdansk, Poland
    Recruiting
  • Przychodnie Grudziadz sp. z o.o.
    Grudziądz, Poland
    Recruiting
  • Clinic BBP Sp z o o
    Katowice, Poland
    Recruiting
  • Niepubliczny Zaklad Opieki Psychiatrycznej MENTIS
    Leszno, Poland
    Recruiting
  • Praktyka Lekarska dr n med Malgorzata Wojtanowska Bogacka
    Poznan, Poland
    Recruiting
  • Szpital Nowowiejski Osrodek Badan Klinicznych
    Warsaw, Poland
    Recruiting

+155 more sites. See ClinicalTrials.gov for the full list.

Study contacts

Similar studies

Other studies for the same condition or treatment. Recruiting studies are listed first.

How to take part

  1. Review the eligibility criteria above with your treating physician.
  2. Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
  3. Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.
Last reviewed 2026-11-14 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.