NBI-1065845 added to a current antidepressant for major depressive disorder
Official title: A Randomized, Double-Blind, Placebo-Controlled Study to Assess the Efficacy and Safety of NBI-1065845 as Adjunctive Treatment in Subjects With Major Depressive Disorder (MDD)
Run by Neurocrine Biosciences · NCT06963021 · Data updated 2026-11-12
This trial will test whether adding NBI-1065845 to a stable oral antidepressant helps adults with major depressive disorder who have not had enough benefit.
Quick facts
| Phase | Phase 3 |
|---|---|
| Study type | Interventional |
| Ages | 18 Years and up |
| Sex | All |
| Enrollment | 200 (estimated) |
| Sponsor | Neurocrine Biosciences Industry-sponsored |
| Locations | 35 sites (Chino, California and 34 other locations) |
| Status | Recruiting |
| Started | May 30, 2025 |
| Main results expected | July 2027 |
| Study ends | July 2027 |
| Registry record updated | August 10, 2026 |
| Trial ID | NCT06963021 on ClinicalTrials.gov |
Is this trial a fit for you?
✓Likely a good fit
Adults with recurrent moderate or severe major depressive disorder or persistent depressive disorder who have had an inadequate response to at least 8 weeks of a stable oral antidepressant and have a HAM-D17 score of 22 or higher are the intended candidates.
✕Probably not a fit
People whose depression is primarily due to another psychiatric disorder treated in the past year, those judged to be at imminent suicide risk, or those already responding well to their current antidepressant are unlikely to benefit from this trial.
A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.
What this trial studies
This is a Phase 3 interventional trial comparing NBI-1065845 with placebo as an add-on to participants' ongoing oral antidepressant medication. Eligible participants have recurrent moderate or severe MDD or persistent depressive disorder and an inadequate response to oral antidepressants, with a HAM-D17 score of 22 or higher at screening and baseline. Participants must have been on a stable oral antidepressant regimen for at least 8 weeks and continue that regimen unchanged during the trial while receiving either NBI-1065845 or placebo. Symptom change will be measured using standard depression rating scales to determine whether the adjunctive therapy provides additional benefit.
Why it matters
Potential benefit: If successful, this could provide an effective add-on medication option for people with MDD who do not respond adequately to current oral antidepressants.
How similar studies have gone: Adjunctive pharmacologic strategies are an established approach in MDD and earlier-phase data for NBI-1065845/TAK-653 provided enough signal to progress to this Phase 3 evaluation.
Who can join: the full rules
Show full inclusion / exclusion criteria
Key Inclusion Criteria: * Participant has a primary diagnosis of recurrent MDD (moderate or severe) or persistent depressive disorder. * Participant has had an inadequate response to oral antidepressant treatments in the current episode of depression. * Participant must have been taking oral antidepressants for at least 8 weeks and is willing to continue the same oral antidepressants at the same dose and frequency of administration throughout participation in the study. * Total Hamilton Depression Rating Scale-17 Item (HAM-D17) score ≥22 at screening and at study baseline (Day 1). * Willing and able to comply with all study procedures and restrictions in the opinion of the investigator. Key Exclusion Criteria: * A current or prior psychiatric disorder diagnosis in the last 1 year that was the primary focus of treatment other than MDD. * Are considered by the investigator to be at imminent risk of suicide or injury to self or others. * Participants depressive symptoms have previously demonstrated nonresponse to electroconvulsive therapy (ECT) in the current major depressive episode.
Where it's running
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Neurocrine Clinical Site
Chino, California, United States Recruiting -
Neurocrine Clinical Site
Los Angeles, California, United States Recruiting -
Neurocrine Clinical Site
Stanford, California, United States Recruiting -
Neurocrine Clinical Site
Aurora, Colorado, United States Recruiting -
Neurocrine Clinical Site
Maitland, Florida, United States Recruiting -
Neurocrine Clinical Site
Miami, Florida, United States Recruiting
Show 29 more locations
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Neurocrine Clinical Site
Cedarhurst, New York, United States Recruiting -
Neurocrine Clinical Site
New York, New York, United States Recruiting -
Neurocrine Clinical Site
Charlotte, North Carolina, United States Recruiting -
Neurocrine Clinical Site
Philadelphia, Pennsylvania, United States Recruiting -
Neurocrine Clinical Site
Bruges, Belgium Recruiting -
Neurocrine Clinical Site
Mechelen, Belgium Recruiting -
Neurocrine Clinical Site
Toronto, Ontario, Canada Recruiting -
Neurocrine Clinical Site
Verdun, Canada Recruiting -
Neurocrine Clinical Site
Kuopio, Finland Recruiting -
Neurocrine Clinical Site
Oulu, Finland Recruiting -
Neurocrine Clinical Site
Tampere, Finland Recruiting -
Neurocrine Clinical Site
Budapest, Hungary Recruiting -
Neurocrine Clinical Site
Budapest, Hungary Recruiting -
Neurocrine Clinical Site
Budapest, Hungary Recruiting -
Neurocrine Clinical Site
Gyöngyös, Hungary Recruiting -
Neurocrine Clinical Site
Jelgava, Latvia Recruiting -
Neurocrine Clinical Site
Liepāja, Latvia Recruiting -
Neurocrine Clinical Site
Sigulda, Latvia Recruiting -
Neurocrine Clinical Site
London, United Kingdom Recruiting -
Neurocrine Clinical Site
Salford, United Kingdom Recruiting -
Neurocrine Clinical Site
Sheffield, United Kingdom Recruiting -
Neurocrine Clinical Site
Southampton, United Kingdom Recruiting -
Neurocrine Clinical Site
Cromwell, Connecticut, United States Active not recruiting -
Neurocrine Clinical Site
Farmington, Connecticut, United States Active not recruiting -
Neurocrine Clinical Site
Tampa, Florida, United States Withdrawn -
Neurocrine Clinical Site
Gaithersburg, Maryland, United States Active not recruiting -
Neurocrine Clinical Site
New York, New York, United States Active not recruiting -
Neurocrine Clinical Site
Alken, Belgium Active not recruiting -
Neurocrine Clinical Site
Kalocsa, Hungary Active not recruiting
Study contacts
- Study coordinator: Neurocrine Medical Information Call Center
- Email: medinfo@neurocrine.com
- Phone: 1-877-641-3461
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How to take part
- Review the eligibility criteria above with your treating physician.
- Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
- Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.