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An Open-label Extension Trial to Investigate Possible Drug-drug Interactions Between Stiripentol or Valproate and Cannabidiol in Patients With Epilepsy

A Phase 2, Double-blind, Randomized, Placebo-controlled Pharmacokinetic Trial in 2 Parallel Groups to Investigate Possible Drug-drug Interactions Between Stiripentol or Valproate and GWP42003-P in Patients With Epilepsy

Status
Completed
Phases
Phase 2
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT02607904
Enrollment
30
Registered
2015-11-18
Start date
2016-12-15
Completion date
2019-05-27
Last updated
2022-12-20

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Epilepsy

Keywords

Cannabidiol, GWP42003-P, Epidiolex, Stiripentol, Valproate

Brief summary

This trial consists of 2 parts: a double-blinded phase and an open-label extension phase. The open-label extension phase only will be described in this record. All participants will receive the same dose of GWP42003-P. However, investigators may subsequently decrease or increase the participant's dose until the optimal dose is found.

Interventions

Clear, colorless to yellow solution containing cannabidiol (CBD) dissolved in the excipients sesame oil and anhydrous ethanol with added sweetener (sucralose) and strawberry flavoring.

Sponsors

Jazz Pharmaceuticals
Lead SponsorINDUSTRY

Study design

Allocation
NA
Intervention model
SINGLE_GROUP
Primary purpose
TREATMENT
Masking
NONE

Eligibility

Sex/Gender
ALL
Age
16 Years to 55 Years
Healthy volunteers
No

Inclusion criteria

Note: Participants who enroll in France or Sweden must be aged 18-55 years. Key Inclusion Criteria: * Participant must have a documented magnetic resonance imaging/computerized tomography of the brain that ruled out a progressive neurologic condition. Key

Exclusion criteria

* Participant has clinically significant unstable medical conditions other than epilepsy. * Participant has a history of symptoms related to a drop in blood pressure due to postural changes (e.g., dizziness, light-headedness, blurred vision, palpitations, weakness, syncope). * Participant has any history of suicidal behavior or any suicidal ideation of type 4 or 5 on the C-SSRS in the last month. * Participant is currently using felbamate and has been taking it for less than 12 months prior to screening visit of the blinded phase of the trial. * Participant is currently using or has in the past used recreational or medicinal cannabis, or synthetic cannabinoid-based medications (including Sativex®) within the 3 months prior to trial entry. * Participant has any known or suspected history of any drug abuse or addiction. * Participant is unwilling to abstain from recreational or medicinal cannabis, or synthetic cannabinoid-based medications (including Sativex) for the duration for the trial. * Participant has any known or suspected hypersensitivity to cannabinoids or any of the excipients of the Investigational Medicinal Product (IMP), e.g., sesame oil.

Design outcomes

Primary

MeasureTime frameDescription
Number of participants who experienced an adverse event.Up to 48 weeks.The number of participants who experienced an adverse event during the trial is presented.

Secondary

MeasureTime frameDescription
Number of participants with a clinically significant change in serum biochemistry.Up to 48 weeks.The number of participants with a clinically significant change in serum biochemistry is presented.
Number of participants with a clinically significant change in hematology.Up to 48 weeks.The number of participants with a clinically significant change in hematology is presented.
Number of participants with a clinically significant change in urinalysis.Up to 48 weeks.The number of participants with a clinically significant change in urinalysis is presented.
Number of participants with a clinically significant change in vital signs.Up to 48 weeks.The number of participants with a clinically significant change in vital signs (systolic blood pressure, diastolic blood pressure, pulse rate) is presented.
Number of participants with a clinically significant change in 12-lead electrocardiogram (ECG).Up to 48 weeks.The number of participants with a clinically significant change in ECG is presented.
Number of participants with a treatment-emergent suicidality flag.Up to 48 weeks.Suicidality was assessed using the Columbia-Suicide Severity Rating Scale (C-SSRS). The number of participants with a treatment-emergent flag is presented.
Seizure frequency by subtype.Up to 48 weeks.The frequency of each subtype of seizure at baseline and end of treatment is presented.
Number of participants with a treatment-emergent finding indicative of drug abuse liability.Up to 48 weeks.Abuse liability was assessed through monitoring of triggering adverse events of interest and study medication accountability discrepancies. Any findings were assigned to an appropriate classification by the investigator. The number of participants with a treatment-emergent finding indicative of drug abuse liability is presented.
Number of participants with a clinically significant change in physical examination.Up to 48 weeks.The number of participants with a clinically significant change in physical examination is presented.

Countries

Netherlands, Spain, Sweden

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026