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Tuberous Sclerosis Complex Associated Neuropsychiatric DiseasePhase 4EpiComNCT05864846

A Study to Investigate Behavioral and Other Co-Occurring Outcomes With Epidiolex as Add-On Therapy in Participants Aged 1 to 65 Years of Age With Tuberous Sclerosis Complex

A Phase 4 study testing Cannabidiol Oral Solution [Epidiolex] in people with Tuberous Sclerosis Complex Associated Neuropsychiatric Disease, run by Jazz Pharmaceuticals at 19 sites in 4 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

The purpose of this study is to investigate behavioral and other co-occurring outcomes with EPID(I/Y)OLEX as an add-on therapy in participants aged 1 to 65 years with tuberous sclerosis complex (TSC) who experience seizures. Read more about this study

Who is it for?
Ages 1 year to 65 years
What is being tested?
Cannabidiol Oral Solution [Epidiolex]
Type of treatment
Pill or oral medicine
Could I receive a placebo?
No, everyone receives an active treatment
How many people
79 participants
Where
19 sitesin 4 countries
Study dates
29 Jun 2023to 6 Apr 2026
Phase
Phase 4
Are there results?
None posted in the registry

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 1 year to 65 years
  • All sexes
  • No healthy volunteers
  • Child, Adult, Older adult

Who may be able to join

  • Is within the required age range at the time of signing (or at the time of the participant's parent(s)/Legally Authorized Representative (LAR) signing) the informed consent or providing assent (as applicable):
  • Participants based in the US: 1 to 65 years of age, inclusive.
  • Participants based outside the US: 2 to 65 years of age, inclusive.
  • Has a confirmed clinical diagnosis of TSC with a history of seizures in accordance with the 2012 International Tuberous Sclerosis Complex Consensus Conference criteria.
  • Has behaviors (eg, aggression, impulsivity, temper tantrum, self-injury, hyperactivity, extreme shyness, mood swings, poor eye contact, repetitive behaviors, restlessness, difficulty getting along with peers, rigid/inflexible to procedure and/or change) that are considered moderate or severe per the CareGI-S at Screening.
  • Is taking 1 or more anti-seizure medicine (ASM) at a dose that has been stable for at least 4 weeks prior to Screening.
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  • All medications or interventions for epilepsy (including ketogenic diet and any neurostimulation devices for epilepsy) must have been stable for 4 weeks prior to screening and any major changes to treatment regimens should be discussed with the medical monitor.
  • Is naïve to CBD-OS treatment or has been off CBD-OS treatment for at least 3 months prior to Screening.
  • Is willing to maintain any factors expected to affect seizures stable (eg, alcohol consumption, smoking, concomitant medication usage).
  • Is male or female
  • Male participants:
  • Male participants are eligible to participate if they agree to the following during the intervention period and for at least 2 weeks, corresponding to the time needed to eliminate the study intervention after the last dose of study intervention:
  • Refrain from donating fresh unwashed semen. PLUS
  • Use a male condom in addition to a second method of acceptable contraception used by their female partners when having sexual intercourse with a women of childbearing potential (WOCBP) who is not currently pregnant.
  • Female participants:
  • A female participant is eligible to participate if she is not pregnant or breastfeeding and one of the following conditions applies:
  • Is a woman of nonchildbearing potential. OR
  • Is a WOCBP and using a contraceptive method that is highly effective, preferably with low user dependency during the study intervention period and for at least 3 months after the last dose of study intervention. The investigator should evaluate the potential for contraceptive method failure (eg, noncompliance, recently initiated) in relationship to the first dose of study intervention.
  • A WOCBP must have a negative highly sensitive pregnancy test within 28 days before the first dose of study intervention.

Who cannot join

  • Has a clinically significant unstable medical condition other than epilepsy.
  • Has an illness during the 4 weeks prior to screening other than epilepsy which, in the investigator's opinion, could affect study outcomes.
  • Has TSC-specific tumor growth which, in the investigator's opinion, could affect the effectiveness endpoints.
  • Has previously undergone significant surgery for epilepsy that, in the investigator's opinion, may impact the assessment of outcomes.
  • Has initiated felbamate within the last 12 months prior to Screening.
  • Is currently using or has in the past used recreational or medicinal cannabis or synthetic cannabinoid-based medications within the 3 months prior to Screening and is not willing to undergo a 1-month washout period before being rescreened.
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  • Has received an investigational medicinal product within the 3 months prior to the Screening Visit.
  • Has previously been assigned study intervention for this study or is currently enrolled in any other interventional study.
  • Has laboratory values at the Baseline Visit that are abnormal and of clinical significance in the investigator's opinion.
  • Participant has significantly impaired hepatic function at the Baseline Visit.
  • Has any history of suicidal behavior or any suicidal ideation of type 4 or 5 as evaluated with C-SSRS or Children's C-SSRS at the Screening Visit (for participants ≥ 4 years of age).
  • Has any known or suspected hypersensitivity to cannabinoids or any of the excipients of CBD-OS.
  • Has a known or suspected history of alcohol or substance abuse.

Trial locations and contacts

19 sites in 4 countries.

19 sites in 4 countries

United States12 sites
  • Children's Hospital Colorado

    Aurora, Colorado, 80045

  • Massachusetts General Hospital

    Boston, Massachusetts, 02114

  • University of Virginia, Charlottesville

    Charlottesville, Virginia, 22903

  • Cincinnati Children's Hospital Medical Center

    Cincinnati, Ohio, 45229

  • University of Florida Health - Department of Neurology

    Gainesville, Florida, 32608

  • University of Texas Health Science Center at Houston - Clinical Research Unit

    Houston, Texas, 77030

  • Le Bonheur Children's Hospital

    Memphis, Tennessee, 38103

  • Nicklaus Children's Health, Miami

    Miami, Florida, 33155

  • Yale University School of Medicine

    New Haven, Connecticut, 06519

  • Minnesota Epilepsy Group

    Roseville, Minnesota, 55113

  • University of Texas Health Science Center - San Antonio

    San Antonio, Texas, 78229

  • Atrium Health Wake Forest Baptist Medical Center

    Winston-Salem, North Carolina, 27157

Other trials in United States

Canada3 sites
  • Alberta Children's Hospital

    Calgary, Alberta, T3B 6AB

  • The Hospital for Sick Children

    Toronto, Ontario, M5G 1X8

  • BC Children's Hospital

    Vancouver, British Columbia, V6H 3V4

Other trials in Canada

United Kingdom3 sites
  • University Hospitals Bristol NHS Foundation Trust

    Bristol, BS1 3NU

  • Evelina London Children's Hospital Guys St Thomas' NHS Foundation Trust, the Guy's Hospital

    London, England, SE1 7EH

  • Sheffield Children's NHS Foundation Trust

    Sheffield, 2TH

Other trials in United Kingdom

Poland1 site
  • The Children's Memorial Health Institute

    Warsaw, 04-736

Other trials in Poland

About this study

Official title: A Phase 4, Interventional, Multicenter, Open-Label, Single-Arm Study to Assess Behavioral and Other Co-occurring Outcomes Following Treatment With EPID(I/Y)OLEX as Add-on Therapy in Participants (Aged 1 to 65 Years Old) With Seizures Associated With Tuberous Sclerosis Complex

The purpose of this study is to investigate behavioral and other co-occurring outcomes with EPID(I/Y)OLEX as an add-on therapy in participants aged 1 to 65 years with tuberous sclerosis complex (TSC) who experience seizures.

Being tested
Cannabidiol Oral Solution [Epidiolex]
Keywords
Seizures, Tuberous Sclerosis Complex (TSC), Tuberous Sclerosis Complex Associated Neuropsychiatric Disorders (TAND), Epidiolex, Epidyolex, GWP42003-P, JZP926, TSC Associated Neuropsychiatric Disorders, Cannabidiol, Behavior
Medical subject headings
Seizures, Tuberous Sclerosis, Behavior

What participants receive

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

  • Cannabidiol Oral Solution [Epidiolex]Drug

    Also called Epidiolex

    100 mg/ml Cannabidiol Oral solution

Study groups in NCT05864846
Study groupRoleWhat they receive
Cannabidiol Oral SolutionExperimentalParticipants who will receive the Cannabidiol Oral Solution (CBD-OS) titrated up to a dose of 12.5 mg/kg administered twice daily for a total dose of up to 25 mg/kg/day for 26 consecutive weeks. Participants will have the option to continue receiving the CBD-OS for an additional 26 weeks, for a total of 52 weeks.
Receives: Drug: Cannabidiol Oral Solution [Epidiolex]

What is being measured

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

  1. Change in the most problematic behavior Numerical Rating Score (NRS) score within the TAND-SQ

    Measured: Baseline, Week 13, Week 26, Week 52

  2. Change in Tuberous Sclerosis Complex Associated Neuropsychiatric Disorders Self-report, Quantified Checklist (TAND-SQ) score

    Measured: Baseline, Week 13, Week 26, Week 52

  3. Change in Aberrant Behavior Checklist (ABC) score

    Measured: Baseline, Week 13, Week 26, Week 52

  4. Change in Child Behavior Checklist (CBCL) score

    Measured: Baseline, Week 26, Week 52

  5. Change in Adult Behavior Checklist (ABCL) score

    Measured: Baseline, Week 26, Week 52

  6. Change in Adult Self-Report (ASR) score

    Measured: Baseline, Week 26, Week 52

  7. Change in Patient-Reported Outcomes Measurement Information System (PROMIS) domains score

    Measured: Baseline, Week 26, Week 52

  8. Change in sleep characteristics using the Children's Sleep Habits Questionnaire (CSHQ)

    Measured: Baseline, Week 26

  9. Change in sleep characteristics using the Pittsburgh Sleep Quality Index (PSQI)

    Measured: Baseline, Week 26

  10. Change in executive function using Behavior Rating Inventory of Executive Function (BRIEF)

    Measured: Baseline, Week 26

  11. Change in caregiver-reported assessment of Quality of Life (QOL) using Pediatric Quality of Life Survey Family Impact Module (PedsQL FIM)

    Measured: Baseline, Week 26

  12. Change in caregiver-reported assessment of family functioning using Pediatric Quality of Life Survey Family Impact Module (PedsQL FIM)

    Measured: Baseline, Week 26

  13. Change in assessment of QOL using Pediatric Quality of Life Inventory (PedsQL)

    Measured: Baseline, Week 26

  14. Change in caregiver impression of overall severity of symptoms (behavior and seizure control) using the Caregiver Global Impression of Severity (CareGI-S)

    Measured: Baseline, Week 4, Week 13, Week 26, Week 52

  15. Change in participant impression of overall severity of symptoms (behavior and seizure control) using the Patient Global Impression of Severity (PGI-S)

    Measured: Baseline, Week 4, Week 13, Week 26, Week 52

  16. Change in clinician impression of overall severity of symptoms (behavior and seizure control) using the Clinician Global Impression of Severity (CGI-S)

    Measured: Baseline, Week 4, Week 13, Week 26, Week 52

  17. Retention Rate

    Retention rate is the number of participants continuing with CBD-OS treatment over total accrued participants

    Measured: Baseline, Week 13, Week 26, Week 52

  18. Number of participants considered treatment responders

    Treatment responders will be reported as those with a 25%, 50%, 75% and 100% reduction in seizure frequency from baseline

    Measured: Baseline, Week 4, Week 13, Week 26, Week 52

  19. Change in number of seizure-free days

    Measured: Baseline, Week 4, Week 13, Week 26, Week 52

  20. Number of participants experiencing a worsening, no change, or improvement in seizure frequency

    Number of participants who experience a change in seizure frequency from baseline defined as:

    1. worsening (>25%)
    2. no change (-25 to + 25%)
    3. improvement (-25% to -50%, ≥-50% to -75%, ≥-75%)

    Measured: Baseline, Week 4, Week 13, Week 26, Week 52

  21. Change in ideation score per the Columbia-Suicide Severity Rating Scale (C-SSRS)

    Measured: Baseline, Week 4, Week 13, Week 26, Week 52

  22. Change in number of suicide attempts per the C-SSRS

    Measured: Baseline, Week 4, Week 13, Week 26, Week 52

  23. Change in ideation score per the Children's C-SSRS

    Measured: Baseline, Week 4, Week 13, Week 26, Week 52

  24. Change in number of suicide attempts per the Children's C-SSRS

    Measured: Baseline, Week 4, Week 13, Week 26, Week 52

  25. Number of participant inpatient hospitalizations due to epilepsy

    Measured: Up to Week 52

  26. Number of withdrawals due to Treatment Emergent Adverse Events (TEAEs)

    Measured: Up to Week 52

Timeline

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

  1. First posted18 May 2023
  2. Study start29 Jun 2023
  3. Primary completion6 Apr 2026
  4. Study completion6 Apr 2026

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 4
Primary purpose
Treatment
Allocation
Not applicable
Intervention model
Single group
Masking
None (open label)
Enrolment
79 participants (actual)
IDs, dates and publications
ClinicalTrials.gov ID
NCT05864846
Sponsor's protocol ID
JZP926-402
Other IDs
2023-507426-17, 2023
Acronym
EpiCom
Status last verified
Apr 2026
First submitted
9 May 2023
Last updated
27 Apr 2026
Results posted
No
FDA-regulated drug
Yes
FDA-regulated device
No
Individual data sharing
Yes: In accordance with ICMJE requirements, Jazz Pharmaceuticals may provide qualified external researchers access to individual participant data (IPD) and clinical trial data that underlie the results of this trial upon request. Qualified researchers can submit a request on https://www.jazzpharma.com/science/clinical-trial-data-sharing/ as outlined. Jazz Pharmaceuticals reserves the right not to consider a request. For inquiries about Jazz's data sharing policy, contact clinicaldatasharing@jazzpharma.com

Publications

  • Moore-Ramdin L, van Eeghen A, Stevens J, Takhar P, Meitzler S, Fladrowski C, Rozenberg M, Amin S. Co-Creation of the EpiCom Clinical Trial: Bringing the Tuberous Sclerosis Complex Patient Community, Healthcare Professionals, and the Pharmaceutical Industry Together. Patient. 2026 Jul 11. doi: 10.1007/s40271-026-00830-5. Online ahead of print.

    PubMed 42435131

Questions about this trial

What is this clinical trial studying?

A Phase 4 study testing Cannabidiol Oral Solution [Epidiolex] in people with Tuberous Sclerosis Complex Associated Neuropsychiatric Disease, run by Jazz Pharmaceuticals at 19 sites in 4 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 19 inclusion and 13 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 27 Apr 2026. Status can change between updates, so confirm with the study contact before making plans.

Where is the study taking place?

The record lists 19 sites in United States, Canada, United Kingdom, Poland. 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. 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 4 studies take place after a treatment is approved, to learn more about its long-term benefits and risks in everyday use.

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

Are results available for this study?

The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.

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 the most problematic behavior Numerical Rating Score (NRS) score within the TAND-SQ (time frame: Baseline, Week 13, Week 26, Week 52). The study lists 26 primary outcomes in all. 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 NCT05864846, which also lists 1 linked publication.

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 27 Apr 2026.

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