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Narcolepsy With CataplexyPhase 3NCT03030599

A Study of the Efficacy and Safety of JZP-258 in Subjects With Narcolepsy With Cataplexy

A Phase 3 study testing JZP-258 in people with Narcolepsy With Cataplexy, run by Jazz Pharmaceuticals at 25 sites in 6 countries.

Completed

Finished. The study has ended and is not enrolling. Results may be posted on the official record.

Official record
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Trial summary

This is a double-blind, placebo-controlled, randomized-withdrawal, multicenter study of the efficacy and safety of JZP-258. Read more about this study

Who is it for?
Ages 18 to 70 years
Conditions the study is for
Narcolepsy With Cataplexy
What is being tested?
JZP-258
Type of treatment
Pill or oral medicine
Could I receive a placebo?
Yes, some participants may receive a placebo
How many people
201 participants
Where
25 sitesin 6 countries
Study dates
14 Mar 2017to 10 Jul 2019
Phase
Phase 3
Are there results?
Yes, posted in the registrySummary in the doctors' view

Key requirements

Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.

  • Ages 18 to 70 years
  • All sexes
  • No healthy volunteers
  • Adult, Older adult

Who may be able to join

  • Male or female subjects between 18 and 70 years of age, inclusive.
  • Have a primary diagnosis of narcolepsy with cataplexy that meets ICSD-3 criteria or DSM-5 criteria, and currently untreated or treated with or without anticataplectics.
  • If applicable, treated with a stimulant or alerting agent at unchanged doses for at least 2 months prior to dosing or not treated with a stimulant or alerting agent.
  • Willing and able to comply with the study design schedule and other requirements.
  • Willing and able to provide written informed consent.

Who cannot join

  • Narcolepsy secondary to another medical condition (e.g., CNS injury or lesion)
  • History or presence of any unstable or clinically significant medical condition, behavioral or psychiatric disorder (including active suicidal ideation), or history or presence of another neurological disorder or surgical history that might affect the subject's safety and/or interfere with the conduct of the study in the opinion of the Investigator.
  • Treatment with any central nervous system sedating agents, including but not limited to benzodiazepines, nonbenzodiazepine anxiolytics/ hypnotics/sedatives, neuroleptics, opioids, barbiturates, phenytoin, ethosuximide, or MCT inhibitors, e.g. diclofenac, valproate, ibuprofen, within 2 weeks prior to enrollment (discontinuation for the purpose of study enrollment is permitted only if considered safe by the Investigator and approved by the Medical Monitor).
  • Treatment with an antidepressant for cataplexy, if the withdrawal of the antidepressant during cross-titration with JZP-258 might be unsafe due to prior history of depression.
  • Unsafe for the subject to receive placebo treatment for 2 weeks, in the opinion of the Investigator.

Trial locations and contacts

25 sites in 6 countries.

25 sites in 6 countries

United States12 sites
  • Colorado Sleep Institute

    Boulder, Colorado, 80301

  • Center for Sleep & Wake Disorders

    Chevy Chase, Maryland, 20815

  • Intrepid Research

    Cincinnati, Ohio, 45245

  • Cleveland Clinic, Sleep Disorder Center

    Cleveland, Ohio, 44195

  • Fort Wayne Neurological Center

    Fort Wayne, Indiana, 46804

  • Gastonia Medical Specialty Clinic

    Gastonia, North Carolina, 94305

  • Research Carolina

    Huntersville, North Carolina, 28078

  • Pulmonary Disease Specialists

    Kissimmee, Florida, 34741

  • Kentucky Research Group

    Louisville, Kentucky, 40218

  • SDS Clinical Trials, Inc.

    Orange, California, 92858

  • Stanford Health Services

    Stanford, California, 94305

  • Montefiore/ Sleep-Wake Disorders Center

    The Bronx, New York, 10467

Other trials in United States

Spain5 sites
  • Hospital Universitari Vall d'Hebron

    Barcelona, 08035

  • Hospital Clinic i Provincial de Barcelona

    Barcelona, 08036

  • Hospital General de Castellón

    Castelló, 12004

  • Instituto de Investigaciones del Sueño

    Madrid, 28036

  • Hospital Vithas Nuestra Señora de America

    Madrid, 28043

Other trials in Spain

Belgium3 sites
  • UZ Antwerpen

    Edegem, 2650

  • Universitair Ziekenhuis Gent

    Ghent, 9000

  • UZ Leuven

    Leuven, 3000

Other trials in Belgium

Czechia2 sites
  • Fakultni nemocnice Ostrava

    Ostrava-Poruba, 70800

  • Vseobecna fakultni nemocnice v Praze

    Prague, 128 21

Other trials in Czechia

France2 sites
  • Hopital Roger Salengro - CHU Lille

    Lille, 59037

  • Hôpital Gui de Chauliac

    Montpellier, Herault, 34295

Other trials in France

Finland1 site
  • Helsingin Uniklinikka, Vitalmed Oy

    Helsinki, 00380

Other trials in Finland

About this study

Official title: A Double-Blind, Placebo-Controlled, Randomized-Withdrawal, Multicenter Study of the Efficacy and Safety of JZP-258 in Subjects With Narcolepsy With Cataplexy

This is a double-blind, placebo-controlled, randomized-withdrawal, multicenter study of the efficacy and safety of JZP-258.

Read the detailed description

Subjects will be transitioned to JZP-258 based on their treatment status at study entry. All subjects will begin JZP-258 treatment at the beginning of this period and continue through Week 12. They will be treated with JZP-258 alone for the final two weeks of this 12-week period. Once the JZP-258 dose has been optimized per the Investigator's judgment, these subjects may enter the 2-week Stable-Dose Period with that dose. Subjects are eligible to enter the Double-Blind Randomized-Withdrawal Period if the dose of JZP-258 remains unchanged during the Stable-Dose Period and, in the judgment of the Investigator, no clinically significant worsening in narcolepsy symptoms or clinically significant adverse events due to JZP-258 treatment have occurred. Subjects will return for a Safety Follow-up visit 2 weeks after the Double-Blind Randomized-Withdrawal Period. Subjects who complete the double-blind treatment period during the Main Study are eligible to enter a 24-week Open-Label Extension. During this period subjects will receive open label JZP-258. Subjects will return for a Safety Follow-up visit 2 weeks after the Open-Label Extension Period.

Being tested
JZP-258, Placebo
Medical subject headings
Narcolepsy

What participants receive

What participants receive. In a randomised study each person is assigned to one group by chance.

  • JZP-258Drug

    Also called Xyrem®

    JZP-258 oral solution 0.5 g/mL, which is equivalent to 0.413 g/mL of oxybate

  • PlaceboOther

    Matching placebo solution (aqueous solution containing sodium citrate, malic acid, and sucralose; all ingredients were compendial [United States Pharmacopeia/ National Formulary])

Study groups in NCT03030599
Study groupRoleWhat they receive
PlaceboPlacebo comparatorPlacebo
Receives: Other: Placebo
JZP-258ExperimentalJZP-258
Receives: Drug: JZP-258

What is being measured

The primary outcome is the main question the study is designed to answer.

  1. Change in Weekly Number of Cataplexy Attacks

    Participants completed a daily Cataplexy Frequency Diary each night prior to bedtime. Participants were to record the number of cataplexy attacks that they had each day.

    Measured: Change from baseline (2 weeks of the Stable Dose Period) to the 2 weeks of the Double Blind Randomized Withdrawal Period (DB RWP)

Secondary outcomes (5)
  1. Change in the Epworth Sleepiness Scale (ESS) Score

    This is the key secondary endpoint. The Epworth Sleepiness Scale (ESS) was a self-administered questionnaire with 8 questions. Participants were asked to rate, on a 4-point scale (0-3), their usual chances of dozing off or falling asleep while engaged in eight different activities. Most participants engaged in those activities at least occasionally, although not necessarily every day. The ESS score (the sum of 8 item scores, 0-3) can range from 0 to 24. The higher the ESS score, the higher that participants average sleep propensity in daily life (ASP), or their 'daytime sleepiness'.

    Measured: From the end of the Stable Dose Period to the end of the Double Blind Randomized Withdrawal Period

  2. Number of Participants With Worsening Patient Global Impression of Change (PGIc) for Narcolepsy Overall

    At the end of the Double Blind Randomized Withdrawal Period (DB RWP), participants rated the change in their condition on a 7-point scale ranging from 1 = "very much improved" to 7 = "very much worse" since the last visit. This endpoint measures the percentage of participants with worsening PGIc scores for narcolepsy overall (defined as scores of Much Worse or Very Much Worse).

    Measured: At the end of the Double Blind Randomized Withdrawal Period

  3. Number of Participants With Worsening Clinical Global Impression of Change (CGIc) for Narcolepsy Overall

    At the end of the Double Blind Randomized Withdrawal Period, Investigators rated their impression of any change in the severity of the participant's narcolepsy overall condition since the start of the Double Blind Randomized Withdrawal Period on a 7-point scale ranging from 1 = "very much improved" to 7 = "very much worse". This endpoint measures the percentage of participants with worsening CGIc scores for narcolepsy overall, defined as scores of Much Worse or Very Much Worse.

    Measured: At the end of the Double Blind Randomized Withdrawal Period

  4. Change in 36-Item Short Form Health Survey Version 2 (SF-36v2) Scores

    The SF-36v2 is a multi-purpose, short-form health survey with 36 questions/ items. It yields an 8-scale profile of functional health and well-being scores as well as a psychometrically-based physical and mental overall component summary measures. Two summary scores were derived using the SF-36v2. Physical Component Summary measures dimensions of functional health that are meaningful to respondents, including the impact of health and health-related changes on physical function, pain, and the ability to carry out daily roles. The Mental Component Summary component scale measures the impact of health and health-related changes on well-being, including vitality, social function, and emotional well-being. Participants self-report on items in a summary that have between 2-6 choices per item (e.g. none of the time, some of the time, etc.). Summations of item scores were transformed into a range from 0 to 100; zero= worst HRQL, 100=best HRQL. Higher scores indicate better health status.

    Measured: At the End of the Stable Dose Period to the End of the Double Blind Randomized Withdrawal Period

  5. Change in 5-level EQ-5D (EQ-5D-5L) Crosswalk Index Score and Visual Analog Scale

    The EQ-5D-5L is a measure of health outcome that includes a descriptive system consisting of 5 dimensions (mobility, self-care, usual activities, pain/ discomfort, and anxiety/ depression). The EQ-5D-5L includes 5 levels of severity for each of the 5 dimensions of the descriptive system (1= no problems, 2= slight problems, 3= moderate problems, 4= severe problems, and 5= extreme problems) that reflect increasing levels of difficulty. The 5 digit health states for each dimension are converted into a single value per country (0= equivalent to death, 1= equivalent to best imaginable health and values below 0= health states rated worse than death capped at -1), using the EQ-5D-5L crosswalk index value calculator as recommended by EuroQol group. A visual analogue scale (VAS) used within this scale recorded the participants self-rated health on a VAS and the endpoints resulted in a numeric value set ranging from 0 (= worst imaginable health state) up to 100 (= best imaginable health state).

    Measured: At the End of the Stable Dose Period to the End of the Double Blind Randomized Withdrawal Period

Timeline

From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.

  1. First posted25 Jan 2017 (estimated)
  2. Study start14 Mar 2017
  3. Primary completion24 Jan 2019
  4. Study completion10 Jul 2019

Resources

More details

For doctors and researchers: how the study is designed, who runs it, and its registry IDs.

Study design
Study type
Interventional
Phase
Phase 3
Primary purpose
Treatment
Allocation
Randomised
Intervention model
Parallel groups
Masking
Double blind
Who is masked
Participant, Investigator
Enrolment
201 participants (actual)
IDs, dates and publications
ClinicalTrials.gov ID
NCT03030599
Sponsor's protocol ID
15-006
Other IDs
2016-000426-20, 2016
Status last verified
Nov 2020
First submitted
23 Jan 2017
Last updated
12 Nov 2020
Data monitoring committee
No
FDA-regulated drug
Yes
FDA-regulated device
No

Publications

  • Bogan RK, Foldvary-Schaefer N, Skowronski R, Chen A, Thorpy MJ. Long-Term Safety and Tolerability During a Clinical Trial and Open-Label Extension of Low-Sodium Oxybate in Participants with Narcolepsy with Cataplexy. CNS Drugs. 2023 Apr;37(4):323-335. doi: 10.1007/s40263-023-00992-y. Epub 2023 Mar 22.

    PubMed 36947322
  • Dauvilliers Y, Sonka K, Bogan RK, Partinen M, Del Rio Villegas R, Foldvary-Schaefer N, Skowronski R, Chen A, Black J, Skobieranda F, Thorpy MJ. Changes in Cataplexy Frequency in a Clinical Trial of Lower-Sodium Oxybate with Taper and Discontinuation of Other Anticataplectic Medications. CNS Drugs. 2022 Jun;36(6):633-647. doi: 10.1007/s40263-022-00926-0. Epub 2022 May 30.

    PubMed 35635687
  • Bogan RK, Thorpy MJ, Dauvilliers Y, Partinen M, Del Rio Villegas R, Foldvary-Schaefer N, Skowronski R, Tang L, Skobieranda F, Sonka K. Efficacy and safety of calcium, magnesium, potassium, and sodium oxybates (lower-sodium oxybate [LXB]; JZP-258) in a placebo-controlled, double-blind, randomized withdrawal study in adults with narcolepsy with cataplexy. Sleep. 2021 Mar 12;44(3):zsaa206. doi: 10.1093/sleep/zsaa206.

    PubMed 33184650

Questions about this trial

What is this clinical trial studying?

A Phase 3 study testing JZP-258 in people with Narcolepsy With Cataplexy, run by Jazz Pharmaceuticals at 25 sites in 6 countries.

The full registered description is in the About this study section and the official record.

Who may be eligible to take part?

The sponsor lists 5 inclusion and 5 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.

Is this clinical trial currently recruiting?

The record says: finished, as of the sponsor's last update on 12 Nov 2020. Status can change between updates, so confirm with the study contact before making plans.

Where is the study taking place?

The record lists 25 sites in United States, Spain, Belgium, Czechia, France and 1 more country. Whether a site is taking part right now should be confirmed with that site. See every site.

What are the possible benefits and risks?

They depend on the study and the treatment, and no study can promise a benefit. Some participants in this study may receive a placebo. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.

What does this phase mean?

Phase 3 studies compare the treatment with the current standard treatment or a placebo in a large group, to confirm how well it works and watch for side effects.

Not every study follows the same path, and some studies (observational studies, device studies) have no phase.

Are results available for this study?

Yes. Results are posted in the registry (first posted 12 Nov 2020). A summary is in the For doctors view, and the full results are on ClinicalTrials.gov.

How can a doctor refer a patient or contact the research team?

The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.

What does the primary outcome measure?

Change in Weekly Number of Cataplexy Attacks (time frame: Change from baseline (2 weeks of the Stable Dose Period) to the 2 weeks of the Double Blind Randomized Withdrawal Period (DB RWP)). It is what the study was designed to measure, not a finding.

Where can I read the original study information?

On the ClinicalTrials.gov record for NCT03030599, which also lists 3 linked publications.

Does a listing mean the treatment is approved or proven to work?

No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.

How often is this information updated?

AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 12 Nov 2020.

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