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NBI-827104

Phase 2

Epileptic Encephalopathy | Small molecule | Neurology |Neurocrine Biosciences, Inc.|Last Updated: Sep 5, 2025

Success Probability

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Trial Design

RandomizedDouble-BlindPLACEBO_CONTROLLEDDMC
Total Trials1
Total Enrollment24

FDA Designations

No designations recorded

Clinical trial landscape

NBI-827104 · 2 trials · 3 indications

Phase 2 2
NCT04625101Efficacy, Safety, Tolerability, and Pharmacokinetics of NBI-827104 in Pediatric Subjects With Epileptic Encephalopathy With Continuous Spike-and-Wave During SleepEpileptic Encephalopathy
COMPLETED24 Analytics
NCT04880616Safety, Efficacy, and Tolerability of NBI-827104 for the Treatment of Essential TremorEssential Tremor
COMPLETED31 Analytics
PHASE2COMPLETED
Efficacy, Safety, Tolerability, and Pharmacokinetics of NBI-827104 in Pediatric Subjects With Epileptic Encephalopathy With Continuous Spike-and-Wave During Sleep
Epileptic EncephalopathyUnlock trial analytics
PHASE2COMPLETED
Safety, Efficacy, and Tolerability of NBI-827104 for the Treatment of Essential Tremor
Essential TremorUnlock trial analytics

Study Endpoints

Primary Endpoints

Ratio of Spike-Wave Index (SWI) During First Hour of Nonrapid Eye Movement (NREM) Sleep at Week 6
Baseline to Week 6

The ratio of SWI at the end of Week 6 to baseline during the first hour (60 minutes) of NREM sleep based on centralized video-electroencephalograph (EEG) reading using a log base 10 scale. Baseline was defined as the last value measured prior to intake of study treatment on Day 1. SWI was defined as the percentage of seconds with ≥1 spike-wave complex(es) during defined periods of overnight NREM sleep.

Change from Baseline to Day 28 of Each Treatment Period in Amplitude at Peak Frequency of Postural Tremor
Baseline and Day 28 of each treatment period

Secondary Endpoints

Ratio of SWI During First Hour of NREM Sleep at Week 12
Baseline to Week 12
Number of Participants Considered as Responders as Assessed by the Caregiver Global Impression of Change (CaGI-C) Score
Week 6 and Week 12
Number of Participants Considered as Responders as Assessed by the Clinician Global Impression of Change (CGI-C) Score
Week 6 and Week 12
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Study Design & Arms

AllocationRANDOMIZED
MaskingTRIPLE
ModelPARALLEL
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
NBI-827104EXPERIMENTALNBI-827104 administered orally for 13 weeks.
PlaceboPLACEBO_COMPARATORPlacebo administered orally for 13 weeks.
Sequence 1EXPERIMENTALIn treatment period 1 participants will receive increasing doses of NBI-827104 for 28 days. After a 14-day washout period, participants will receive matching placebo for 28 days in treatment period 2.
Sequence 2EXPERIMENTALIn treatment period 1 participants will receive matching placebo for 28 days. After a 14-day washout period, participants will receive increasing doses of NBI-827104 for 28 days in treatment period 2.

Interventions

NameTypeDescription
NBI-827104DRUGTriple T-type calcium channel blocker.
PlaceboDRUGNon-active dosage form.
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Eligibility Criteria

Age Range4 Years to 12 Years
SexALL
Healthy VolunteersNo
Study Sites15

Inclusion Criteria: 1. Signed informed consent by the parent(s) or legal representative(s) and, if applicable, assent from developmentally capable pediatric subjects. 2. Diagnosis of EECSWS. 3. Have diagnosis of EECSWS confirmed by the Diagnosis Confirmation Panel (DCP). 4. Stable dosage and stable...

Countries:United StatesCanadaDenmarkSpainSwitzerlandUnited KingdomNetherlands
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Frequently asked questions about NBI-827104

What is NBI-827104 used for?

NBI-827104 is an investigational small molecule being studied for the treatment of Essential Tremor and Epileptic Encephalopathy, specifically Epileptic Encephalopathy with Continuous Spike-and-Wave During Sleep. It is in Phase 2 clinical development and is not yet approved by the FDA.

What does NBI-827104 target?

NBI-827104 is a small molecule developed by Neurocrine Biosciences. Its specific molecular target has not been disclosed in available information. The drug is being investigated for its potential to treat neurological conditions including Essential Tremor and Epileptic Encephalopathy.

Who makes NBI-827104?

NBI-827104 is being developed by Neurocrine Biosciences, Inc., a biopharmaceutical company traded on NASDAQ under the ticker NBIX. The company is conducting clinical trials to evaluate the drug's safety and efficacy in neurological indications.

What phase is NBI-827104 in?

NBI-827104 is in Phase 2 clinical development. It is an investigational drug and has not received FDA approval. Two Phase 2 trials have been completed, one in pediatric patients with Epileptic Encephalopathy and one in adults with Essential Tremor.

What clinical trials is NBI-827104 in?

NBI-827104 has completed two Phase 2 clinical trials. NCT04625101 studied the drug in pediatric subjects with Epileptic Encephalopathy with Continuous Spike-and-Wave During Sleep, enrolling 24 participants. NCT04880616 studied the drug for Essential Tremor in 31 adult participants. Both trials are completed.

Is NBI-827104 the same as any other drug?

NBI-827104 is the primary name used for this investigational compound. No alternative names have been reported in clinical trial registrations. It is a distinct small molecule being developed by Neurocrine Biosciences for neurological conditions.