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NBI-1065845

Phase 3

Major Depressive Disorder | Small molecule | Psychiatry |Neurocrine Biosciences, Inc.|Last Updated: Aug 11, 2026

Target and mechanism

Molecular targetAMPA receptor
Target classReceptor
ModalitySmall molecule

Success Probability

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Market & Valuation

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Trial Design

RandomizedDouble-BlindPLACEBO_CONTROLLEDDMC
Total Trials6
Total Enrollment2,183

FDA Designations

No designations recorded

Clinical trial landscape

NBI-1065845 · 6 trials · 1 indication

Phase 3 5Phase 2 1
NCT07196501A Study to Evaluate the Maintenance Effect of NBI-1065845 as an Adjunctive Treatment in Participants With Major Depressive Disorder (MDD)Major Depressive Disorder
RECRUITING550 Analytics
NCT06963021NBI-1065845-MDD3026: Study to Assess the Efficacy and Safety of NBI-1065845 as an Adjunctive Treatment in Participants With Major Depressive Disorder (MDD)Major Depressive Disorder
RECRUITING200 Analytics
NCT06966401Long-Term Study to Assess the Safety and Tolerability of NBI-1065845 as an Adjunctive Treatment in Participants With Major Depressive Disorder (MDD)Major Depressive Disorder
RECRUITING850 Analytics
NCT06911112NBI-1065845-MDD3025: Study to Assess the Efficacy and Safety of NBI-1065845 as an Adjunctive Treatment in Participants With Major Depressive Disorder (MDD)Major Depressive Disorder
RECRUITING200 Analytics
NCT06786624Study to Assess the Efficacy and Safety of NBI-1065845 as an Adjunctive Treatment in Participants With Major Depressive Disorder (MDD)Major Depressive Disorder
RECRUITING200 Analytics
PHASE3RECRUITING
A Study to Evaluate the Maintenance Effect of NBI-1065845 as an Adjunctive Treatment in Participants With Major Depressive Disorder (MDD)
Major Depressive DisorderUnlock trial analytics
PHASE3RECRUITING
NBI-1065845-MDD3026: Study to Assess the Efficacy and Safety of NBI-1065845 as an Adjunctive Treatment in Participants With Major Depressive Disorder (MDD)
Major Depressive DisorderUnlock trial analytics
PHASE3RECRUITING
Long-Term Study to Assess the Safety and Tolerability of NBI-1065845 as an Adjunctive Treatment in Participants With Major Depressive Disorder (MDD)
Major Depressive DisorderUnlock trial analytics
PHASE3RECRUITING
NBI-1065845-MDD3025: Study to Assess the Efficacy and Safety of NBI-1065845 as an Adjunctive Treatment in Participants With Major Depressive Disorder (MDD)
Major Depressive DisorderUnlock trial analytics
PHASE3RECRUITING
Study to Assess the Efficacy and Safety of NBI-1065845 as an Adjunctive Treatment in Participants With Major Depressive Disorder (MDD)
Major Depressive DisorderUnlock trial analytics

Study Endpoints

Primary Endpoints

Time from Randomization to Relapse
From randomization to the earliest of relapse or end-of study (up to approximately 32 months)
Change from Baseline in Total Montgomery-Åsberg Depression Rating Scale (MADRS) Score at Day 56
Baseline, Day 56
Number of Participants with Treatment-emergent Adverse Events (TEAEs)
Baseline through Week 52
Change from Baseline in Total Montgomery Åsberg Depression Rating Scale (MADRS) Score at Day 28
Baseline, Day 28

Secondary Endpoints

Change from Baseline in Sheehan Disability Scale (SDS) Total Score at Day 56
Baseline, Day 56
Change from Baseline in Clinical Global Impression-Severity Scale (CGI-S) Score at Day 56
Baseline, Day 56
Change from Baseline in Total MADRS Score at Day 7, Day 14, and Day 56
Baseline, Days 7, 14, and 56
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Study Design & Arms

AllocationRANDOMIZED
MaskingQUADRUPLE
ModelPARALLEL
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
Open-label Treatment Period: NBI-1065845EXPERIMENTALParticipants will be treated with NBI-1065845 during the open-label treatment period.
Randomized Double-blind Maintenance Period: NBI-1065845EXPERIMENTALParticipants will be randomized to receive NBI-1065845 during the randomized double-blind maintenance period.
Randomized Double-blind Maintenance Period: PlaceboEXPERIMENTALParticipants will be randomized to receive matching placebo during the randomized double-blind maintenance period.
NBI-1065845EXPERIMENTALNBI-1065845 administered orally once a day.
PlaceboPLACEBO_COMPARATORPlacebo identical in appearance to NBI-1065845 will be administered orally once a day.
NBI-1065845 Low DoseEXPERIMENTALParticipants will receive low-dose NBI-1065845 orally once a day.
NBI-1065845 High DoseEXPERIMENTALParticipants will receive high-dose NBI-1065845 orally once a day.

Interventions

NameTypeDescription
NBI-1065845DRUGOral tablet
PlaceboDRUGOral tablet
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Eligibility Criteria

Age Range18 Years to N/A
SexALL
Healthy VolunteersNo
Study Sites60

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 antide...

Countries:United StatesAustraliaBulgariaCanadaEstoniaItalyPolandSerbiaSouth KoreaSpainTaiwanBelgiumFinlandHungaryLatviaUnited KingdomCroatiaCzechiaLithuaniaNetherlandsRomaniaSlovakiaSweden
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Recent Changes (Last 90 Days)

LOWAug 11, 2026NCT06911112lastUpdatePostDate: changed
LOWAug 11, 2026NCT06963021lastUpdatePostDate: changed
LOWAug 11, 2026NCT06911112lastUpdatePostDate: changed
LOWAug 11, 2026NCT06963021lastUpdatePostDate: changed
LOWAug 11, 2026NCT06963021lastUpdatePostDate: changed
LOWJul 24, 2026NCT06966401lastUpdatePostDate: changed
LOWJul 24, 2026NCT07196501lastUpdatePostDate: changed
LOWJul 24, 2026NCT06966401lastUpdatePostDate: changed
LOWJul 24, 2026NCT07196501lastUpdatePostDate: changed
LOWJun 23, 2026NCT06963021lastUpdatePostDate: changed
LOWJun 23, 2026NCT06963021lastUpdatePostDate: changed
LOWJun 22, 2026NCT06966401lastUpdatePostDate: changed
LOWJun 22, 2026NCT06966401lastUpdatePostDate: changed

Frequently asked questions about NBI-1065845

What is NBI-1065845 used for?

NBI-1065845 is an investigational small molecule being developed for the treatment of Major Depressive Disorder (MDD) in adults. It is being studied as an adjunctive treatment, meaning it is added to existing antidepressant therapy. The drug is currently in Phase 3 clinical development and is not yet approved by regulatory authorities.

What does NBI-1065845 target?

NBI-1065845 targets the AMPA receptor, a type of glutamate receptor in the brain. By modulating this receptor, the drug is believed to enhance glutamatergic signaling, which may contribute to its antidepressant effects. This mechanism is being investigated in clinical trials for Major Depressive Disorder.

Who makes NBI-1065845?

NBI-1065845 is being developed by Neurocrine Biosciences, Inc., a biopharmaceutical company traded on NASDAQ under the ticker symbol NBIX. The company is conducting Phase 3 clinical trials to evaluate the drug's efficacy and safety as an adjunctive treatment for Major Depressive Disorder.

What phase is NBI-1065845 in?

NBI-1065845 is currently in Phase 3 clinical development. It has completed a Phase 2 trial (NCT05203341) and has three ongoing Phase 3 trials, including studies for adjunctive treatment, long-term safety, and maintenance of effect. The drug remains investigational and has not received FDA approval.

What clinical trials is NBI-1065845 in?

NBI-1065845 has one completed Phase 2 trial (NCT05203341) and three recruiting Phase 3 trials: NCT06911112 (adjunctive efficacy and safety), NCT06966401 (long-term safety and tolerability), and NCT07196501 (maintenance of effect). These trials enroll adults with Major Depressive Disorder across multiple countries.

Is NBI-1065845 the same as any other drug?

NBI-1065845 is the sole name provided for this investigational compound. No alternative names or brand names have been disclosed in the available clinical trial information. The drug is being studied exclusively under this identifier in trials for Major Depressive Disorder.