Recent Updates
Recently added Catalysts

Xywav

Phase 3

Narcolepsy | Small molecule | Neurology |Jazz Pharmaceuticals plc|Last Updated: Aug 19, 2026

Success Probability

Subscribe to view

Market & Valuation

Subscribe to view

Trial Design

RandomizedDouble-BlindPLACEBO_CONTROLLED
Total Trials1
Total Enrollment120

FDA Designations

No designations recorded

Clinical trial landscape

Xywav · 1 trial · 2 indications

Phase 3 1
NCT07625280A Study Evaluating the Efficacy and Safety of Xywav Expanded Dosing vs Placebo in Participants With Narcolepsy or IHNarcolepsy
RECRUITING120 Analytics
PHASE3RECRUITING
A Study Evaluating the Efficacy and Safety of Xywav Expanded Dosing vs Placebo in Participants With Narcolepsy or IH
NarcolepsyUnlock trial analytics

Study Endpoints

Primary Endpoints

Change in Epworth Sleepiness Scale (ESS) scores
End of Stable Dose Period (up to Week 14), up to end of Double-Blind Randomized-Withdrawal Period (up to Week 16)

ESS is a self-administered questionnaire with 8 questions. Each question is scored on a scale ranging from 0 (would never fall asleep) to 3 (high chance of falling asleep). It has a total score ranging from 0 to 24, with a higher score representing increased daytime sleepiness.

Secondary Endpoints

Percentage of participants reporting minimally, much and very much worse in their CGIc questionnaire for IH or narcolepsy symptoms
At the end of Double-Blind Randomized-Withdrawal Period (up to Week 16)
Percentage of participants reporting minimally, much and very much worse in their PGIc questionnaire for IH or narcolepsy symptoms
At the end of Double-Blind Randomized-Withdrawal Period (up to Week 16)
Change in IHSS scores in participants with IH
End of stable dose period (up to Week 14), up to end of Double-Blind Randomized-Withdrawal Period (up to Week 16)
Unlock Study Endpoints

Study Design & Arms

AllocationRANDOMIZED
MaskingQUADRUPLE
ModelPARALLEL
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
Narcolepsy Cohort once-nightly expanded Xywav dose groupACTIVE_COMPARATORParticipants with narcolepsy will receive an expanded once-nightly dosing of Xywav for up to 14 weeks until they reach a stable dose. Once stable dose is achieved, participants will continue taking their stable dose of Xywav for 2 additional weeks.
Narcolepsy Cohort once-nightly expanded Xywav followed by placebo groupPLACEBO_COMPARATORParticipants with narcolepsy will receive an expanded once-nightly dosing of Xywav for up to 14 weeks until they reach a stable dose. Once stable dose is achieved, participants will take placebo for 2 additional weeks.
Narcolepsy Cohort twice-nightly expanded Xywav dose groupACTIVE_COMPARATORParticipants with narcolepsy will receive an expanded twice-nightly dosing of Xywav for up to 14 weeks until they reach a stable dose. Once stable dose is achieved, participants will continue taking their stable dose of Xywav for 2 additional weeks.
Narcolepsy Cohort twice-nightly expanded Xywav followed by placebo groupPLACEBO_COMPARATORParticipants with narcolepsy will receive an expanded twice-nightly dosing of Xywav for up to 14 weeks until they reach a stable dose. Once stable dose is achieved, participants will take placebo for 2 additional weeks.
IH Cohort once-nightly expanded Xywav dose groupACTIVE_COMPARATORParticipants with IH will receive an expanded once-nightly dosing of Xywav for up to 14 weeks until they reach a stable dose. Once stable dose is achieved, participants will continue taking their stable dose of Xywav for 2 additional weeks.
IH Cohort once-nightly expanded Xywav followed by placebo groupPLACEBO_COMPARATORParticipants with IH will receive an expanded once-nightly dosing of Xywav for up to 14 weeks until they reach a stable dose. Once stable dose is achieved, participants will take placebo for 2 additional weeks.
IH Cohort twice-nightly expanded Xywav dose groupACTIVE_COMPARATORParticipants with IH will receive an expanded twice-nightly dosing of Xywav for up to 14 weeks until they reach a stable dose. Once stable dose is achieved, participants will continue taking their stable dose of Xywav for 2 additional weeks.
IH Cohort twice-nightly expanded Xywav followed by placebo groupPLACEBO_COMPARATORParticipants with IH will receive an expanded twice-nightly dosing of Xywav for up to 14 weeks until they reach a stable dose. Once stable dose is achieved, participants will take placebo for 2 additional weeks.

Interventions

NameTypeDescription
XywavDRUG0.5 g/ml calcium, magnesium, potassium, and sodium oxybates solution taken by mouth
PlaceboOTHERPlacebo solution taken by mouth
Unlock Study Design Details

Eligibility Criteria

Age Range18 Years to 75 Years
SexALL
Healthy VolunteersNo
Study Sites3

Inclusion Criteria: 1. Has a primary diagnosis of IH or narcolepsy Type 1 or Type 2 (NT1 or NT2) 2. Participants with a primary diagnosis of NT1 must have a history of at least 14 cataplexy attacks in a typical 2-week period, based on participant history at the time of diagnosis and prior to initia...

Countries:United States
Unlock Eligibility Criteria

Recent Changes (Last 90 Days)

LOWAug 20, 2026NCT07625280Status: NOT_YET_RECRUITING → RECRUITING
LOWAug 20, 2026NCT07625280Status: NOT_YET_RECRUITING → RECRUITING
LOWAug 20, 2026NCT07625280Status: NOT_YET_RECRUITING → RECRUITING
LOWAug 20, 2026NCT07625280Status: NOT_YET_RECRUITING → RECRUITING

Frequently asked questions about Xywav

What is Xywav used for in narcolepsy?

Xywav is an investigational small molecule being studied for the treatment of narcolepsy. It is currently in Phase 3 clinical development. The drug is being evaluated for its efficacy and safety in participants with narcolepsy or idiopathic hypersomnia.

How does Xywav work?

The specific molecular target of Xywav is not disclosed in the available information. Therefore, the exact mechanism of action is not described here. The drug is being studied for its therapeutic effects in narcolepsy and idiopathic hypersomnia.

Who makes Xywav?

Xywav is being developed by Jazz Pharmaceuticals plc, a company listed on the stock exchange under the ticker JAZZ. The company is conducting clinical trials to evaluate the drug's efficacy and safety in patients with narcolepsy.

What phase is Xywav in?

Xywav is currently in Phase 3 clinical development. It is an investigational drug and has not been approved by regulatory authorities. The ongoing Phase 3 trial is recruiting participants to assess its efficacy and safety.

What clinical trials is Xywav in?

Xywav is being studied in a Phase 3 clinical trial with the identifier NCT07625280. This randomized, double-blind, placebo-controlled trial is evaluating the efficacy and safety of Xywav expanded dosing versus placebo in participants with narcolepsy or idiopathic hypersomnia. The trial is recruiting in the United States.

Is Xywav the same as other narcolepsy treatments?

Xywav is a distinct investigational drug being developed by Jazz Pharmaceuticals. It is not identified as being the same as any other named treatment in the available information. Its unique properties and mechanism are under investigation in clinical trials.