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Completed

NCT Number: NCT05864846

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

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.

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Key information

Conditions

Tuberous Sclerosis Complex Associated Neuropsychiatric Disease Behavior Congenital Abnormalities Congenital, Hereditary, and Neonatal Diseases and Abnormalities Genetic Diseases, Inborn Hamartoma Heredodegenerative Disorders, Nervous System Malformations of Cortical Development Malformations of Cortical Development, Group I Neoplasms Neoplasms, Multiple Primary Neoplastic Syndromes, Hereditary Nervous System Diseases Nervous System Malformations Neurocutaneous Syndromes Neurodegenerative Diseases Neurologic Manifestations Pathological Conditions, Signs and Symptoms Seizures Signs and Symptoms Tuberous Sclerosis

Age range

1 year–65 year

Sex eligibility

All sexes

Study type

Interventional

Phase

Phase 4

Primary location

Alberta Children's Hospital, Calgary, Alberta, Canada

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Who can participate

Healthy volunteers accepted: No

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

  • 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.
  • 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.

Exclusion criteria

  • 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.
  • 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.

Treatment and study plan

Cannabidiol Oral Solution [Epidiolex]

Drug

100 mg/ml Cannabidiol Oral solution

Other names: Epidiolex

Primary outcomes

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

    Time frame: Baseline, Week 13, Week 26, Week 52

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

    Time frame: Baseline, Week 13, Week 26, Week 52

  3. Change in Aberrant Behavior Checklist (ABC) score

    Time frame: Baseline, Week 13, Week 26, Week 52

  4. Change in Child Behavior Checklist (CBCL) score

    Time frame: Baseline, Week 26, Week 52

  5. Change in Adult Behavior Checklist (ABCL) score

    Time frame: Baseline, Week 26, Week 52

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

    Time frame: Baseline, Week 26, Week 52

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

    Time frame: Baseline, Week 26, Week 52

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

    Time frame: Baseline, Week 26

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

    Time frame: Baseline, Week 26

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

    Time frame: 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)

    Time frame: Baseline, Week 26

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

    Time frame: Baseline, Week 26

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

    Time frame: 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)

    Time frame: 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)

    Time frame: 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)

    Time frame: Baseline, Week 4, Week 13, Week 26, Week 52

  17. Retention Rate

    Time frame: Baseline, Week 13, Week 26, Week 52

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

  18. Number of participants considered treatment responders

    Time frame: Baseline, Week 4, Week 13, Week 26, Week 52

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

  19. Change in number of seizure-free days

    Time frame: Baseline, Week 4, Week 13, Week 26, Week 52

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

    Time frame: Baseline, Week 4, Week 13, Week 26, Week 52

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

    • worsening (>25%)
    • no change (-25 to + 25%)
    • improvement (-25% to -50%, ≥-50% to -75%, ≥-75%)

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

    Time frame: Baseline, Week 4, Week 13, Week 26, Week 52

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

    Time frame: Baseline, Week 4, Week 13, Week 26, Week 52

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

    Time frame: Baseline, Week 4, Week 13, Week 26, Week 52

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

    Time frame: Baseline, Week 4, Week 13, Week 26, Week 52

  25. Number of participant inpatient hospitalizations due to epilepsy

    Time frame: Up to Week 52

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

    Time frame: Up to Week 52

Sponsors and collaborators

Lead sponsor

Jazz Pharmaceuticals

Industry

Registry information

Official study 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

Acronym: EpiCom

Important dates

Study start
2023
Primary completion
2026
Study completion
2026
First posted
May 18, 2023
Registry last updated
Apr 27, 2026

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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