Long-term safety and tolerability of NBI-1065845 added to antidepressants for major depression
Official title: A Long-Term, Open-Label Study to Assess the Safety and Tolerability of NBI-1065845 as Adjunctive Treatment in Subjects With Major Depressive Disorder (MDD)
Run by Neurocrine Biosciences · NCT06966401 · Data updated 2026-11-12
This will test whether taking NBI-1065845 alongside regular oral antidepressants is safe and tolerable long-term for adults with major depressive disorder who haven't responded well to treatment.
Quick facts
| Phase | Phase 3 |
|---|---|
| Study type | Interventional |
| Ages | 18 Years and up |
| Sex | All |
| Enrollment | 850 (estimated) |
| Sponsor | Neurocrine Biosciences Industry-sponsored |
| Locations | 120 sites (Huntsville, Alabama and 119 other locations) |
| Status | Recruiting |
| Started | April 16, 2025 |
| Main results expected | May 2029 |
| Study ends | May 2030 |
| Registry record updated | November 2, 2026 |
| Trial ID | NCT06966401 on ClinicalTrials.gov |
Is this trial a fit for you?
✓Likely a good fit
Adults with recurrent major depressive disorder or persistent depressive disorder who have had an inadequate response to at least 8 weeks of oral antidepressant treatment in the current episode and who can comply with study procedures.
✕Probably not a fit
People with a primary non-MDD psychiatric disorder in the past year, those judged to be at imminent risk of suicide or harm, or those who cannot follow study procedures are unlikely to benefit from enrolling.
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 study of NBI-1065845 given as an adjunct to participants' ongoing oral antidepressants to characterize long-term safety and tolerability. Eligible participants have recurrent major depressive disorder or persistent depressive disorder and an inadequate response to current oral antidepressant treatment. Participants will continue their antidepressant regimen while receiving NBI-1065845 and will be monitored regularly for adverse events, laboratory changes, and suicidality. The protocol excludes those with another primary psychiatric disorder within the past year or those judged to be at imminent risk of self-harm.
Why it matters
Potential benefit: If successful, this could provide an additional adjunctive medication option that is safe and tolerable for people whose depression has not responded adequately to standard oral antidepressants.
How similar studies have gone: Adjunctive pharmacologic approaches have shown benefit in prior depression trials, and early-phase data for TAK-653/NBI-1065845 suggest pharmacologic activity, but long-term adjunctive safety for this agent is not yet well established.
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 prior to screening. * 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. Other protocol defined inclusion and exclusion criteria apply.
Where it's running
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Neurocrine Clinical Site
Huntsville, Alabama, United States Recruiting -
Neurocrine Clinical Site
Bryant, Arkansas, United States Recruiting -
Neurocrine Clinical Site
Little Rock, Arkansas, United States Recruiting -
Neurocrine Clinical Site
Chino, California, United States Recruiting -
Neurocrine Clinical Site
Glendale, California, United States Recruiting -
Neurocrine Clinical Site
Irvine, California, United States Recruiting
Show 44 more locations
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Los Angeles, California, United States Recruiting -
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Oceanside, California, United States Recruiting -
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Orange, California, United States Recruiting -
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Pico Rivera, California, United States Recruiting -
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San Diego, California, United States Recruiting -
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San Jose, California, United States Recruiting -
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Cromwell, Connecticut, United States Recruiting -
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Farmington, Connecticut, United States Recruiting -
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Hollywood, Florida, United States Recruiting -
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Maitland, Florida, United States Recruiting -
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Maitland, Florida, United States Recruiting -
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Miami, Florida, United States Recruiting -
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Miami Gardens, Florida, United States Recruiting -
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Palm Bay, Florida, United States Recruiting -
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Tampa, Florida, United States Recruiting -
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Tampa, Florida, United States Recruiting -
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Tampa, Florida, United States Recruiting -
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Atlanta, Georgia, United States Recruiting -
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Gaithersburg, Maryland, United States Recruiting -
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Boston, Massachusetts, United States Recruiting -
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Watertown, Massachusetts, United States Recruiting -
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O'Fallon, Missouri, United States Recruiting -
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Saint Charles, Missouri, United States Recruiting -
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Cedarhurst, New York, United States Recruiting -
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Mount Kisco, New York, United States Recruiting -
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New York, New York, United States Recruiting -
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New York, New York, United States Recruiting -
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The Bronx, New York, United States Recruiting -
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Avon Lake, Ohio, United States Recruiting -
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Edmond, Oklahoma, United States Recruiting -
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Philadelphia, Pennsylvania, United States Recruiting -
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Dallas, Texas, United States Recruiting -
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DeSoto, Texas, United States Recruiting -
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Houston, Texas, United States Recruiting -
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Stafford, Texas, United States Recruiting -
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The Woodlands, Texas, United States Recruiting -
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Draper, Utah, United States Recruiting -
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Carlton, Victoria, Australia Recruiting -
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Melbourne, Australia Recruiting -
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Alken, Belgium Recruiting -
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Mechelen, Belgium Recruiting -
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Plovdiv, Bulgaria Recruiting -
Neurocrine Clinical Site
Sofia, Bulgaria Recruiting -
Neurocrine Clinical Site
Sofia, Bulgaria Recruiting
+70 more sites. See ClinicalTrials.gov for the full list.
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.