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JZP926

Phase 4FDA approved 2018

Juvenile Myoclonic Epilepsy | Small molecule | Neurology |Jazz Pharmaceuticals plc|Trials Updated: Oct 6, 2026

JZP926 development status

FDA approval Jun 25, 2018 as Epidiolex
Approval holderJazz Pharms Res
ApplicationNDA210365
Highest phase Phase 4 (NCT04133480)
Phase scored for JAZZPhase 2
Registered trials 22 across 2 sponsors since Aug 2014

Label indication EPIDIOLEX is indicated for the treatment of seizures associated with Lennox-Gastaut syndrome (LGS), Dravet syndrome (DS), or tuberous sclerosis complex (TSC) in patients 1 year of age and older. EPIDIOLEX is indicated for the treatment of seizures associated with Lennox-Gastaut syndrome, Dravet syndrome, or tuberous sclerosis complex in patients 1 year of age and older ( 1 ) FDA label

JZP926 target and mechanism

ModalitySmall molecule

Also known as JZP926 capsule, CBD-OS, GWP42003-P, Cannabidiol Oral Solution, Epidiolex, Epidyolex

Success Probability

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Market & Valuation

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Trial Design

RandomizedDouble-BlindPLACEBO_CONTROLLEDDMC
Total Trials5
Total Enrollment506

FDA Designations

No designations recorded

JZP926 clinical trials

JZP926 · 5 trials · 5 indications

Phase 3 1Phase 2 2Phase 1 2
NCT07723976A Study to Evaluate the Safety and Efficacy of CBD-OS in Participants With DEEDevelopmental and Epileptic Encephalopathy (DEE)
NOT YET_RECRUITING120 Analytics
PHASE3NOT YET_RECRUITING
A Study to Evaluate the Safety and Efficacy of CBD-OS in Participants With DEE
Developmental and Epileptic Encephalopathy (DEE)Unlock trial analytics

Study Endpoints

Primary Endpoints

Change in Countable Motor Seizure Frequency Per 28 Days
Baseline up to 6 weeks of double-blind treatment period
Change from baseline in myoclonic seizure days per 28 days (Part A and Part B)
Baseline up to end of 16 weeks treatment period
Safe completion as assessed by the number of participants with no significant side effects
6 months
Safe completion as assessed by the number of participants with no seizure onset
6 months
Frequency of Spike Wave Index
Up to 20 weeks

Assess the reduction in spike wave index by evaluating the differences in activity from the four 24-hour ambulatory EEGs each participant obtains while enrolled in this study

Percent change in countable focal seizure frequency compared to baseline
Baseline up to 16 weeks

Secondary Endpoints

Change in Total Seizure Frequency Per 28 Days
Baseline up to 6 weeks of double-blind treatment period
Proportion of Participants Who Achieve ≥ 50% Reduction From Baseline in Countable Motor Seizure Frequency
Baseline up to 6 weeks of double-blind treatment period
Caregiver Global Impression of Change (CaGI-C) Score
Week 6 of double-blind treatment period
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Study Design & Arms

AllocationRANDOMIZED
MaskingDOUBLE
ModelPARALLEL
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
CBD-OSEXPERIMENTALParticipants with DEE will be randomized to CBD-OS up to 10 mg/kg twice daily for a 6-week treatment period.
PlaceboPLACEBO_COMPARATORParticipants with DEE will be randomized to matching placebo for a 6-week treatment period.
Open-Label Extension: CBD-OSEXPERIMENTALParticipants with DEE who completed the double-blind phase of the study and enter the optional OLE will begin a 22-week open-label treatment period with CBD-OS up to 10 mg/kg twice daily following a 2-week Blinded Transition Period.
JZP926 CapsuleEXPERIMENTALParticipants with JME will be randomized to JZP926 capsule based on weight-tiered dosing for a 16-week treatment period.
Open-Label Extension: JZP926 CapsuleEXPERIMENTALParticipants completing Part A or Part B will have the option to continue into an open-label extension for up to 52 weeks, inclusive of a 4 week blinded transition.
Presymptomatic Epidiolex TreatmentEXPERIMENTALEpidiolex will be started at 2.5 mg/kg/day divided twice daily. The dose will increase weekly as tolerated over the next 5 weeks to a target dose of 20 mg/kg/day.
IPACTIVE_COMPARATOREpidiolex (Cannabidiol) is a colorless to yellow solution in a 100mL vial that is to be administered with a 5mL syringe.The starting dosage is 2.5 mg/kg twice daily, or 5 mg/kg/day. After one week, the dosage can be increased to a maintenance dosage of 5mg/kg twice daily, or 10 mg/kg/day. Patients who are tolerating Epidiolex at 10mg/kg per day and require further reduction of seizures may benefit from a dosage increase up to a maximum recommended maintenance. Dosage of 10mg/kg twice daily (20mg/kg/day), in weekly increments of 2.5 mg/kg twice daily(5mg/kg/day), as tolerated. For patients in whom a more rapid titration from 10 mg/kg/day to 20 mg/kg/day is warranted, the dosage may be increased to no more frequently than every other day administration of the 20 mg/kg/day. Dosage resulted in somewhat greater reductions in seizure rates than the recommended maintenance dosage of 10 mg/kg/day, but with an increase in adverse reactions.

Interventions

NameTypeDescription
CBD-OSDRUGOral solution, twice daily
PlaceboDRUGOral solution, twice daily
JZP926 capsuleDRUGOral administration BID according to body weight
Epidiolex 100 mg/mL Oral SolutionDRUGEpidiolex is a prescription form of cannabidiol used to treat seizures. Epidiolex will be started at 2.5 mg/kg/day divided twice daily. The dose will increase weekly as tolerated over the next 5 weeks to a target dose of 20 mg/kg/day.
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Eligibility Criteria

Age Range1 Year to N/A
SexALL
Healthy VolunteersNo

Participants are eligible to be included in the study only if all the following criteria apply: 1. Is at least 1 year of age at the time of signing the informed consent/assent. 2. Meets the clinical phenotype for DEE as specified in the protocol. 3. Per the investigator, the underlying etiology con...

Countries:United States
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Recent Changes (Last 90 Days)

LOWOct 6, 2026NCT07723963Status: NOT_YET_RECRUITING → RECRUITING
LOWOct 6, 2026NCT07723963Status: NOT_YET_RECRUITING → RECRUITING
LOWOct 2, 2026NCT07233239lastUpdatePostDate: changed
LOWOct 2, 2026NCT07233239lastUpdatePostDate: changed
LOWSep 2, 2026NCT07723963startDate: changed
LOWSep 2, 2026NCT07723963startDate: changed
LOWSep 2, 2026NCT07723963startDate: changed
LOWAug 11, 2026NCT07233239lastUpdatePostDate: changed
LOWAug 11, 2026NCT07233239lastUpdatePostDate: changed
LOWJul 31, 2026NCT07233239lastUpdatePostDate: changed
LOWJul 31, 2026NCT07233239lastUpdatePostDate: changed
LOWJul 24, 2026NCT07723976NEW_TRIAL: changed
LOWJul 24, 2026NCT07723963NEW_TRIAL: changed
LOWJul 24, 2026NCT07723976NEW_TRIAL: changed
LOWJul 24, 2026NCT07723963NEW_TRIAL: changed

Frequently asked questions about JZP926

What is JZP926?

JZP926 is an investigational small molecule being developed by Jazz Pharmaceuticals plc for the treatment of juvenile myoclonic epilepsy, a form of epilepsy that begins in childhood or adolescence. It is currently in Phase 2 clinical development and is not yet approved for any indication.

What is JZP926 used for?

JZP926 is being studied for the treatment of juvenile myoclonic epilepsy. This is the only indication currently under investigation for the drug. It is an investigational therapy and has not been approved by the FDA for any use.

Who makes JZP926?

JZP926 is being developed by Jazz Pharmaceuticals plc, which trades on the Nasdaq under the ticker symbol JAZZ. Jazz Pharmaceuticals is the sponsor of the clinical program evaluating the drug in juvenile myoclonic epilepsy.

What phase is JZP926 in?

JZP926 is in Phase 2 clinical development. It is an investigational drug and has not been approved by the FDA. The Phase 2 trial is currently recruiting participants and has not yet been completed.

What clinical trials is JZP926 in?

JZP926 is being evaluated in a single Phase 2 trial, NCT07723963, titled A Study to Evaluate the Safety and Efficacy of JZP926 Capsule for the Treatment of Juvenile Myoclonic Epilepsy. The trial is recruiting, is placebo-controlled and double-blind, and plans to enroll 260 participants in the United States.

Is JZP926 the same as JZP926 capsule?

Yes, JZP926 capsule is another name for JZP926. The capsule designation refers to the oral capsule formulation of the drug being evaluated in the Phase 2 trial for juvenile myoclonic epilepsy. Both names refer to the same investigational asset developed by Jazz Pharmaceuticals.