CClinicalTrials.gg
CompletedNCT02954887Updated Sep 2, 2022Results posted

Phase 3 Trial of Cannabidiol (CBD; GWP42003-P) for Infantile Spasms: Open-label Extension Phase (GWPCARE7)

A Phase 3 interventional study of GWP42003-P in Infantile Spasms, sponsored by Jazz Pharmaceuticals. Completed at 7 sites in 2 countries. Open to participants aged 1 Month to 24 Months. Per ClinicalTrials.gov, last updated 2022-09-02.

Sponsored by Jazz Pharmaceuticals · Phase 3, Interventional, and Treatment

Phase
Phase 3
Study type
Interventional
Enrollment
9
Allocation
Not applicable
Ages
1 Month to 24 Months
Sex
All
01

Study summary

This trial consists of 3 parts: a pilot safety phase, a pivotal randomized controlled phase, and an open-label extension phase. The open-label extension phase only will be described in this record. All participants will receive GWP42003-P.

02

Conditions studied

  • Infantile Spasms

Keywords

  • GWP42003-P
  • Cannabidiol
03

In context

Spasm

145 studies on the registry are indexed under Spasm; 15 are open to participants now.

This study's enrollment of 9 is below the median of 52 across 117 interventional studies indexed under Spasm.

Browse Spasm studies →

Lead sponsor

Jazz Pharmaceuticals is the lead sponsor of 167 studies on the registry; 20 are open to participants now.

Of its 39 completed or terminated interventional studies of FDA-regulated products, 28 (72%) have results posted.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
1 Month to 24 Months
Sexes eligible
All
Accepts healthy volunteers
No

Eligibility criteria

Only participants who completed the pilot or pivotal phases of the trial may proceed to take part in this open-label extension phase of the trial.

Key eligibility criteria for the blinded phase were as follows:

Key Inclusion Criteria:

  • Participant is diagnosed with IS and has failed to respond adequately following treatment with 1 or more approved IS therapies.

Key Exclusion Criteria:

  • Participant is currently taking or has taken clobazam or any mammalian target of rapamycin (mTOR) inhibitor within the 2 weeks prior to the screening visit.
  • Participant has a QT interval, corrected for heart rate with Bazett's formula (QTcB), of 460 msec or greater on ECG.
  • Participant's caregiver is currently giving or has given recreational or medicinal cannabis, or synthetic cannabinoid-based medications, within the 1 month prior to the screening visit.
  • Participant's caregiver is unwilling to abstain from giving the participant (including the participant's mother abstaining themselves, if breastfeeding)recreational or medicinal cannabis, or synthetic cannabinoid-based medications (other than the study drug) during the trial.
  • Participant has any known or suspected hypersensitivity to cannabinoids or any of the excipients of the study drug, such as sesame oil.
  • Participant has significantly impaired hepatic function at the screening visit.
  • Participant has received an investigational medicinal product as part of a clinical trial within a minimum of 5 half-lives prior to the screening visit.
05

Study design

Phase
Phase 3
Primary purpose
Treatment
Allocation
Not applicable
Intervention model
Single group
Masking
None (open label)
Enrollment
9 participants (actual)

Study arms

  • Experimental
    GWP42003-P

    Administered orally, up to the target dose recommended by the data safety monitoring committee. Participants continue at the target dose, or the highest tolerated dose up to the target dose, for a total of 12 months' treatment.

    Drug: GWP42003-P

Interventions

  • DrugGWP42003-P

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

    Also known as: CBD, Cannabidiol

06

What researchers measure

Primary outcomes

  1. Number of Participants With Severe Treatment-emergent Adverse Events (TEAEs)

    TEAEs were collected in members of the Safety Population, comprised of all participants who received at least 1 dose of GWP42003-P. TEAEs are defined as all adverse events not present prior to the first investigational medicinal product (IMP) or placebo administration or any event already present that worsened in severity or frequency following IMP.

    Time frame: From signing of informed consent up to Day 417

  2. Number of Participants With Any Low or High Hematology Laboratory Parameter Value

    Time frame: Days 19, 29, 43, 71, 127, 211, 295, 379, and 389

  3. Number of Participants With Any Low or High Biochemistry Laboratory Parameter Value

    Time frame: Days 19, 29, 43, 71, 127, 211, 295, 379, and 389

  4. Number of Participants With Any Clinically Relevant Urinalysis Parameter Value

    Clinical relevance was determined by the investigator.

    Time frame: Days 19, 29, 43, 71, 127, 211, 295, 379, and 389

  5. Number of Participants With Clinically Significant Electrocardiogram Findings

    Clinical significance was determined by the investigator.

    Time frame: From signing of informed consent up to Day 389

  6. Number of Participants With Clinically Significant Vital Sign Findings

    Clinical significance was determined by the investigator.

    Time frame: From signing of informed consent up to Day 389

  7. Number of Participants With Clinically Significant Physical Examination Findings

    Clinical significance was determined by the investigator.

    Time frame: From signing of informed consent up to Day 389

Secondary outcomes

  1. Number of Participants Free of Clinical Spasms

    Clinical spasms were determined by video-electroencephalography (VEEG) for at least 8 hours and up to 24 hours.

    Time frame: Days 29, 43, 127, 211, 295, and 379

  2. Percentage of Participants Free of Clinical Spasms

    Clinical spasms were determined by VEEG for at least 8 hours and up to 24 hours.

    Time frame: Days 29, 43, 127, 211, 295, and 379

  3. Number of Participants With a Resolution of Hypsarrhythmia

    Resolution of hypsarrhythmia was determined by VEEG for at least 8 hours and up to 24 hours.

    Time frame: Days 29, 43, 127, 211, 295, and 379

  4. Percentage of Participants With a Resolution of Hypsarrhythmia

    Resolution of hypsarrhythmia was determined by VEEG for at least 8 hours and up to 24 hours.

    Time frame: Days 29, 43, 127, 211, 295, and 379

  5. Number of Participants Experiencing Spasms and Seizures by Subtype

    Caregivers recorded the participant's spasms and seizures by category in a daily diary. Subtypes of spasms and seizure included, clonic, tonic-clonic, myoclonic, focal, and absence.

    Time frame: Days 19, 29, 127, 211, 295, and 379

  6. Caregiver Global Impression of Change (CGIC)

    The CGIC is a single-question assessment completed by the caregiver. The question assessed the status of the participant's condition since treatment start. The caregiver provided a rating on a 7-point scale: 1, very much improved; 2, much Improved; 3, slightly improved; 4, no change; 5, slightly worse; 6, much worse; 7, very much worse.

    Time frame: Baseline; Days 29, 43, 71, 127, 211, 295, and 379

  7. Physician Global Impression of Change (PGIC)

    The PGIC is a single-question assessment completed by the investigator. The question assessed the status of the participant's condition since treatment start. The investigator provided a rating on a 7-point scale: 1, very much improved; 2, much Improved; 3, slightly improved; 4, no change; 5, slightly worse; 6, much worse; 7, very much worse.

    Time frame: Baseline; Days 29, 43, 71, 127, 211, 295, and 379

  8. Number of Responders

    A responder is defined as a participant experiencing a resolution of hypsarrhythmia and free of spasms. Test for responders was conducted by VEEG for at least 8 hours and up to 24 hours.

    Time frame: Days 29, 43, 127, 211, 295, and 379

  9. Percentage of Responders

    A responder is defined as a participant experiencing a resolution of hypsarrhythmia and free of spasms. Test for responders was conducted by VEEG for at least 8 hours and up to 24 hours.

    Time frame: Days 29, 43, 127, 211, 295, and 379

  10. Change From Baseline in Height

    A positive change indicates an increase in the average participant's height. A negative change indicates a decrease in the average participant's height. Change from Baseline was calculated as the post-Baseline value minus the Baseline value.

    Time frame: Baseline (Day 1 of Pilot Study); Days 29, 43, 71, 127, 211, 295, 379, and 389

  11. Change From Baseline in Body Weight.

    A positive change indicates an increase in the average participant's weight. A negative change indicates a decrease in the average participant's weight. Change from Baseline was calculated as the post-Baseline value minus the Baseline value.

    Time frame: Baseline (Day 1 of Pilot Study); Days 29, 43, 71, 127, 211, 295, 379, and 389

  12. Change From Baseline in Head Circumference

    A positive change indicates an increase in the average participant's head circumference. A negative change indicates a decrease in the average participant's head circumference. Change from Baseline was calculated as the post-Baseline value minus the Baseline value.

    Time frame: Baseline (Day 1 of PIlot Study); Days 29, 43, 71, 127, 211, 295, 379, and 389

  13. Change From Baseline in Vineland Adaptive Behavior Scales, Second Edition (Vineland-II) Score

    The Vineland-II scores were assessed by the participant's caregiver. Caregivers were asked to score questions in the following categories: the participant's communication, daily living, physical activity, problem behaviors, and social skills and relationships. Scoring was slightly different for each section, but generally ranged from "usually" (2) to "never" (0). The total score is calculated as the sum of standard scores from the domains and converted into the adaptive behavior composite score (ranging from 20 to 160). Higher scores represent greater levels of functioning, and lower scores represent lower levels of functioning. Change from Baseline was calculated as the post-Baseline value minus the Baseline value.

    Time frame: Baseline (Day 1 of Pilot Study); Day 211, Day 379

  14. Number of Participants With Relapse of Spasms

    Analysis could not be conducted for this outcome measure because the study met No Go Criteria. The Pilot Phase concluded after 9 participants completed treatment and demonstrated continued hypsarrhythmia and spasms on follow-up VEEG. The Pivotal Phase was not initiated; however, participants completing the Pilot Phase could roll into the Open Label Extension Phase for up to 1 year.

    Time frame: Day 16 to Day 379

  15. Percentage of Participants With Relapse of Spasms

    Analysis could not be conducted for this outcome measure because the study met No Go Criteria. The Pilot Phase concluded after 9 participants completed treatment and demonstrated continued hypsarrhythmia and spasms on follow-up VEEG. The Pivotal Phase was not initiated; however, participants completing the Pilot Phase could roll into the Open Label Extension Phase for up to 1 year.

    Time frame: Day 16 to Day 379

  16. Average Time to Cessation of Spasms

    Analysis could not be conducted for this outcome measure because the study met No Go Criteria. The Pilot Phase concluded after 9 participants completed treatment and demonstrated continued hypsarrhythmia and spasms on follow-up VEEG. The Pivotal Phase was not initiated; however, participants completing the Pilot Phase could roll into the Open Label Extension Phase for up to 1 year.

    Time frame: Day 1 to Day 379

  17. Average Time to Relapse

    Analysis could not be conducted for this outcome measure because the study met No Go Criteria. The Pilot Phase concluded after 9 participants completed treatment and demonstrated continued hypsarrhythmia and spasms on follow-up VEEG. The Pivotal Phase was not initiated; however, participants completing the Pilot Phase could roll into the Open Label Extension Phase for up to 1 year.

    Time frame: Day 16 to Day 379

07

Results

Posted Jul 23, 2020
Limitations and caveats
This study met No Go Criteria. The Pilot Phase concluded after 9 participants completed treatment, and the Pivotal Phase was not initiated. Participants completing the Pilot Phase could roll into the Open Label Extension Phase for up to 1 year.

Participant flow

Participant flow — Overall Study
MilestoneGWP42003-P OS
Started9
Completed2
Not completed7
Withdrew: Withdrawal by subject3
Withdrew: Lack of efficacy3
Withdrew: Other1

Outcome measures

PrimaryNumber of Participants With Severe Treatment-emergent Adverse Events (TEAEs)

TEAEs were collected in members of the Safety Population, comprised of all participants who received at least 1 dose of GWP42003-P. TEAEs are defined as all adverse events not present prior to the first investigational medicinal product (IMP) or placebo administration or any event already present that worsened in severity or frequency following IMP.

Time frame:
From signing of informed consent up to Day 417
Reported as:
Count of participants · Participants
Number of Participants With Severe Treatment-emergent Adverse Events (TEAEs)
ParticipantsGWP42003-P OS
Number of Participants With Severe Treatment-emergent Adverse Events (TEAEs)7
PrimaryNumber of Participants With Any Low or High Hematology Laboratory Parameter Value
Time frame:
Days 19, 29, 43, 71, 127, 211, 295, 379, and 389
Reported as:
Count of participants · Participants
Number of Participants With Any Low or High Hematology Laboratory Parameter Value
ParticipantsGWP42003-P OS
Day 19, Low3
Day 19, High4
Day 29, Low3
Day 29, High4
Day 43, Low1
Day 43, High2
Day 71, Low1
Day 71, High3
Day 127, Low1
Day 127, High3
Day 211, Low1
Day 211, High2
Day 295, Low2
Day 295, High0
Day 379, Low4
Day 379, High4
Day 389, Low1
Day 389, High4
PrimaryNumber of Participants With Any Low or High Biochemistry Laboratory Parameter Value
Time frame:
Days 19, 29, 43, 71, 127, 211, 295, 379, and 389
Reported as:
Count of participants · Participants
Number of Participants With Any Low or High Biochemistry Laboratory Parameter Value
ParticipantsGWP42003-P OS
Day 19, Low6
Day 19, High7
Day 29, Low6
Day 29, High6
Day 43, Low4
Day 43, High5
Day 71, Low2
Day 71, High4
Day 127, Low4
Day 127, High3
Day 211, Low2
Day 211, High3
Day 295, Low2
Day 295, High3
Day 379, Low5
Day 379, High7
Day 389, Low3
Day 389, High2
PrimaryNumber of Participants With Any Clinically Relevant Urinalysis Parameter Value

Clinical relevance was determined by the investigator.

Time frame:
Days 19, 29, 43, 71, 127, 211, 295, 379, and 389
Reported as:
Count of participants · Participants
Number of Participants With Any Clinically Relevant Urinalysis Parameter Value
ParticipantsGWP42003-P OS
Day 190
Day 290
Day 430
Day 711
Day 1270
Day 2110
Day 2950
Day 3790
Day 3890
PrimaryNumber of Participants With Clinically Significant Electrocardiogram Findings

Clinical significance was determined by the investigator.

Time frame:
From signing of informed consent up to Day 389
Reported as:
Count of participants · Participants
Number of Participants With Clinically Significant Electrocardiogram Findings
ParticipantsGWP42003-P OS
Number of Participants With Clinically Significant Electrocardiogram Findings0
PrimaryNumber of Participants With Clinically Significant Vital Sign Findings

Clinical significance was determined by the investigator.

Time frame:
From signing of informed consent up to Day 389
Reported as:
Count of participants · Participants
Number of Participants With Clinically Significant Vital Sign Findings
ParticipantsGWP42003-P OS
Number of Participants With Clinically Significant Vital Sign Findings0
PrimaryNumber of Participants With Clinically Significant Physical Examination Findings

Clinical significance was determined by the investigator.

Time frame:
From signing of informed consent up to Day 389
Reported as:
Count of participants · Participants
Number of Participants With Clinically Significant Physical Examination Findings
ParticipantsGWP42003-P OS
Number of Participants With Clinically Significant Physical Examination Findings0
SecondaryNumber of Participants Free of Clinical Spasms

Clinical spasms were determined by video-electroencephalography (VEEG) for at least 8 hours and up to 24 hours.

Time frame:
Days 29, 43, 127, 211, 295, and 379
Reported as:
Count of participants · Participants
Number of Participants Free of Clinical Spasms
ParticipantsGWP42003-P OS
Day 291
Day 432
Day 1271
Day 2111
Day 2951
Day 3793
SecondaryPercentage of Participants Free of Clinical Spasms

Clinical spasms were determined by VEEG for at least 8 hours and up to 24 hours.

Time frame:
Days 29, 43, 127, 211, 295, and 379
Reported as:
Number · percentage of participants
Percentage of Participants Free of Clinical Spasms
percentage of participantsGWP42003-P OS
Day 2911.1
Day 4322.2
Day 12711.1
Day 21111.1
Day 29511.1
Day 37933.3
SecondaryNumber of Participants With a Resolution of Hypsarrhythmia

Resolution of hypsarrhythmia was determined by VEEG for at least 8 hours and up to 24 hours.

Time frame:
Days 29, 43, 127, 211, 295, and 379
Reported as:
Count of participants · Participants
Number of Participants With a Resolution of Hypsarrhythmia
ParticipantsGWP42003-P OS
Day 291
Day 430
Day 1271
Day 2110
Day 2951
Day 3793
SecondaryPercentage of Participants With a Resolution of Hypsarrhythmia

Resolution of hypsarrhythmia was determined by VEEG for at least 8 hours and up to 24 hours.

Time frame:
Days 29, 43, 127, 211, 295, and 379
Reported as:
Number · percentage of participants
Percentage of Participants With a Resolution of Hypsarrhythmia
percentage of participantsGWP42003-P OS
Day 2911.1
Day 430
Day 12711.1
Day 2110
Day 29511.1
Day 37933.3
SecondaryNumber of Participants Experiencing Spasms and Seizures by Subtype

Caregivers recorded the participant's spasms and seizures by category in a daily diary. Subtypes of spasms and seizure included, clonic, tonic-clonic, myoclonic, focal, and absence.

Time frame:
Days 19, 29, 127, 211, 295, and 379
Reported as:
Count of participants · Participants
Number of Participants Experiencing Spasms and Seizures by Subtype
ParticipantsGWP42003-P OS
Day 19, Clonic0
Day 19, Tonic-Clonic0
Day 19, Atonic0
Day 19, Myoclonic0
Day 19, Focal1
Day 19, Absence0
Day 19, Not Done0
Day 29, Clonic0
Day 29, Tonic-Clonic0
Day 29, Atonic0
Day 29, Myoclonic0
Day 29, Focal1
Day 29, Absence0
Day 29, Not Done0
Day 127, Clonic0
Day 127, Tonic-Clonic1
Day 127, Atonic0
Day 127, Myoclonic1
Day 127, Focal0
Day 127, Absence1
Day 127, No Done0
Day 211, Clonic0
Day 211, Tonic-Clonic1
Day 211, Atonic0
Day 211, Myoclonic0
Day 211, Focal0
Day 211, Absence1
Day 211, Not Done0
Day 295, Clonic0
Day 295, Tonic-Clonic1
Day 295, Atonic1
Day 295, Myoclonic0
Day 295, Focal0
Day 295, Absence1
Day 295, Not Done0
Day 379, Clonic1
Day 379, Tonic-Clonic1
Day 379, Atonic0
Day 379, Myoclonic0
Day 379, Focal1
Day 379, Absence1
Day 379, Not Done0
SecondaryCaregiver Global Impression of Change (CGIC)

The CGIC is a single-question assessment completed by the caregiver. The question assessed the status of the participant's condition since treatment start. The caregiver provided a rating on a 7-point scale: 1, very much improved; 2, much Improved; 3, slightly improved; 4, no change; 5, slightly worse; 6, much worse; 7, very much worse.

Time frame:
Baseline; Days 29, 43, 71, 127, 211, 295, and 379
Reported as:
Number · participants
Caregiver Global Impression of Change (CGIC)
participantsGWP42003-P OS
Day 29, Very Much Improved1
Day 29, Much Improved1
Day 29, Slightly Improved5
Day 29, No Change1
Day 29, Slightly Worse0
Day 29, Much Worse0
Day 29, Very Much Worse0
Day 29, Not Done0
Day 43, Very Much Improved2
Day 43, Much Improved1
Day 43, Slightly Improved3
Day 43, No Change0
Day 43, Slightly Worse0
Day 43, Much Worse0
Day 43, Very Much Worse0
Day 43, Not Done0
Day 71, Very Much Improved3
Day 71, Much Improved0
Day 71, Slightly Improved1
Day 71 No Change0
Day 71, Slightly Worse1
Day 71, Much Worse0
Day 71, Very Much Worse0
Day 71, Not Done0
Day 127, Very Much Improved2
Day 127, Much Improved2
Day 127, Slightly Improved0
Day 127, No Change0
Day 127, Slightly Worse0
Day 127, Much Worse0
Day 127, Very Much Worse0
Day 127, Not Done0
Day 211, Very Much Improved1
Day 211, Much Improved2
Day 211, Slightly Improved0
Day 211, No Change0
Day 211, Slightly Worse0
Day 211, Much Worse0
Day 211, Very Much Worse0
Day 211, Not Done0
Day 295, Very Much Improved1
Day 295, Much Improved2
Day 295, Slightly Improved0
Day 295, No Change0
Day 295, Slightly Worse0
Day 295, Much Worse0
Day 295, Very Much Worse0
Day 295, Not Done0
Day 379, Very Much Improved2
Day 379, Much Improved1
Day 379, Slightly Improved3
Day 379, No Change0
Day 379, Slightly Worse1
Day 379, Much Worse1
Day 379, Very Much Worse0
Day 379, Not Done1
SecondaryPhysician Global Impression of Change (PGIC)

The PGIC is a single-question assessment completed by the investigator. The question assessed the status of the participant's condition since treatment start. The investigator provided a rating on a 7-point scale: 1, very much improved; 2, much Improved; 3, slightly improved; 4, no change; 5, slightly worse; 6, much worse; 7, very much worse.

Time frame:
Baseline; Days 29, 43, 71, 127, 211, 295, and 379
Reported as:
Number · participants
Physician Global Impression of Change (PGIC)
participantsGWP42003-P OS
Day 29, Very Much Improved1
Day 29, Much Improved1
Day 29, Slightly Improved2
Day 29, No Change4
Day 29, Slightly Worse0
Day 29, Much Worse0
Day 29, Very Much Worse0
Day 29, Not Done0
Day 43, Very Much Improved1
Day 43, Much Improved0
Day 43, Slightly Improved4
Day 43, No Change1
Day 43, Slightly Worse0
Day 43, Much Worse0
Day 43, Very Much Worse0
Day 43, Not Done0
Day 71, Very Much Improved1
Day 71, Much Improved2
Day 71, Slightly Improved1
Day 71, No Change1
Day 71, Slightly Worse0
Day 71, Much Worse0
Day 71, Very Much Worse0
Day 71, Not Done0
Day 127, Very Much Improved1
Day 127, Much Improved2
Day 127, Slightly Improved1
Day 127, No Change0
Day 127, Slightly Worse0
Day 127, Much Worse0
Day 127, Very Much Worse0
Day 127, Not Done0
Day 211, Very Much Improved0
Day 211, Much Improved1
Day 211, Slightly Improved1
Day 211, No Change1
Day 211, Slightly Worse0
Day 211, Much Worse0
Day 211, Very Much Worse0
Day 211, Not Done0
Day 295, Very Much Improved0
Day 295, Much Improved1
Day 295, Slightly Improved0
Day 295, No Change1
Day 295, Slightly Worse0
Day 295, Much Worse1
Day 295, Very Much Worse0
Day 295, Not Done0
Day 379, Very Much Improved0
Day 379, Much Improved1
Day 379, Slightly Improved3
Day 379, No Change2
Day 379, Slightly Worse1
Day 379, Much Worse1
Day 379, Very Much Worse0
Day 379, Not Done1
SecondaryNumber of Responders

A responder is defined as a participant experiencing a resolution of hypsarrhythmia and free of spasms. Test for responders was conducted by VEEG for at least 8 hours and up to 24 hours.

Time frame:
Days 29, 43, 127, 211, 295, and 379
Reported as:
Count of participants · Participants
Number of Responders
ParticipantsGWP42003-P OS
Day 291
Day 430
Day 1270
Day 2110
Day 2951
Day 3793
SecondaryPercentage of Responders

A responder is defined as a participant experiencing a resolution of hypsarrhythmia and free of spasms. Test for responders was conducted by VEEG for at least 8 hours and up to 24 hours.

Time frame:
Days 29, 43, 127, 211, 295, and 379
Reported as:
Number · percentage of participants
Percentage of Responders
percentage of participantsGWP42003-P OS
Day 2911.1
Day 430
Day 1270
Day 2110
Day 29511.1
Day 37933.3
SecondaryChange From Baseline in Height

A positive change indicates an increase in the average participant's height. A negative change indicates a decrease in the average participant's height. Change from Baseline was calculated as the post-Baseline value minus the Baseline value.

Time frame:
Baseline (Day 1 of Pilot Study); Days 29, 43, 71, 127, 211, 295, 379, and 389
Reported as:
Mean · centimeters
Change From Baseline in Height
centimetersGWP42003-P OS
Baseline (Day 1 of Pilot Study)75.04 ± 9.557
Day 29, Open-label Extension (OLE)0.85 ± 0.980
Day 43, OLE0.92 ± 1.530
Day 71, OLE3.10 ± 0.652
Day 127, OLE3.38 ± 1.377
Day 211, OLE5.33 ± 1.258
Day 295, OLE8.17 ± 1.528
Day 379, OLE5.31 ± 4.036
Day 389, OLE3.55 ± 4.085
SecondaryChange From Baseline in Body Weight.

A positive change indicates an increase in the average participant's weight. A negative change indicates a decrease in the average participant's weight. Change from Baseline was calculated as the post-Baseline value minus the Baseline value.

Time frame:
Baseline (Day 1 of Pilot Study); Days 29, 43, 71, 127, 211, 295, 379, and 389
Reported as:
Mean · kilograms
Change From Baseline in Body Weight.
kilogramsGWP42003-P OS
Baseline (Day 1 of Pilot Study)9.92 ± 3.245
Day 29, OLE0.39 ± 0.309
Day 43, OLE0.75 ± 0.809
Day 71, OLE1.10 ± 0.430
Day 127, OLE1.25 ± 0.420
Day 211, OLE1.17 ± 0.503
Day 295, OLE2.10 ± 0.889
Day 379, OLE1.19 ± 0.862
Day 389, OLE0.98 ± 0.637
SecondaryChange From Baseline in Head Circumference

A positive change indicates an increase in the average participant's head circumference. A negative change indicates a decrease in the average participant's head circumference. Change from Baseline was calculated as the post-Baseline value minus the Baseline value.

Time frame:
Baseline (Day 1 of PIlot Study); Days 29, 43, 71, 127, 211, 295, 379, and 389
Reported as:
Mean · centimeters
Change From Baseline in Head Circumference
centimetersGWP42003-P OS
Baseline (Day 1 of Pilot Study)44.71 ± 2.724
Day 29, OLE-0.01 ± 1.229
Day 43, OLE0.54 ± 0.288
Day 71, OLE0.70 ± 0.570
Day 127, OLE1.50 ± 0.500
Day 211, OLE0.75 ± 0.354
Day 295, OLE-0.3 ± 2.31
Day 379, OLE1.14 ± 1.707
Day 389, OLE0.90 ± 1.782
SecondaryChange From Baseline in Vineland Adaptive Behavior Scales, Second Edition (Vineland-II) Score

The Vineland-II scores were assessed by the participant's caregiver. Caregivers were asked to score questions in the following categories: the participant's communication, daily living, physical activity, problem behaviors, and social skills and relationships. Scoring was slightly different for each section, but generally ranged from "usually" (2) to "never" (0). The total score is calculated as the sum of standard scores from the domains and converted into the adaptive behavior composite score (ranging from 20 to 160). Higher scores represent greater levels of functioning, and lower scores represent lower levels of functioning. Change from Baseline was calculated as the post-Baseline value minus the Baseline value.

Time frame:
Baseline (Day 1 of Pilot Study); Day 211, Day 379
Reported as:
Mean · score on a scale
Change From Baseline in Vineland Adaptive Behavior Scales, Second Edition (Vineland-II) Score
score on a scaleGWP42003-P OS
Baseline, Day 1 of Pilot Study33.6 ± 37.27
Day 211 of OLE6.3 ± 3.51
Day 379 of OLE-5.4 ± 23.42
SecondaryNumber of Participants With Relapse of Spasms

Analysis could not be conducted for this outcome measure because the study met No Go Criteria. The Pilot Phase concluded after 9 participants completed treatment and demonstrated continued hypsarrhythmia and spasms on follow-up VEEG. The Pivotal Phase was not initiated; however, participants completing the Pilot Phase could roll into the Open Label Extension Phase for up to 1 year.

Time frame:
Day 16 to Day 379

No measurements were reported for this outcome.

SecondaryPercentage of Participants With Relapse of Spasms

Analysis could not be conducted for this outcome measure because the study met No Go Criteria. The Pilot Phase concluded after 9 participants completed treatment and demonstrated continued hypsarrhythmia and spasms on follow-up VEEG. The Pivotal Phase was not initiated; however, participants completing the Pilot Phase could roll into the Open Label Extension Phase for up to 1 year.

Time frame:
Day 16 to Day 379

No measurements were reported for this outcome.

SecondaryAverage Time to Cessation of Spasms

Analysis could not be conducted for this outcome measure because the study met No Go Criteria. The Pilot Phase concluded after 9 participants completed treatment and demonstrated continued hypsarrhythmia and spasms on follow-up VEEG. The Pivotal Phase was not initiated; however, participants completing the Pilot Phase could roll into the Open Label Extension Phase for up to 1 year.

Time frame:
Day 1 to Day 379

No measurements were reported for this outcome.

SecondaryAverage Time to Relapse

Analysis could not be conducted for this outcome measure because the study met No Go Criteria. The Pilot Phase concluded after 9 participants completed treatment and demonstrated continued hypsarrhythmia and spasms on follow-up VEEG. The Pivotal Phase was not initiated; however, participants completing the Pilot Phase could roll into the Open Label Extension Phase for up to 1 year.

Time frame:
Day 16 to Day 379

No measurements were reported for this outcome.

Adverse events

Collected over From signing of informed consent up to Day 417. Non-serious events are listed at a 5% frequency threshold.

Adverse event summary by group
GroupDeathsSeriousOther
Cannabidiol OS0/9 (0%)2/9 (22.2%)7/9 (77.8%)
Most frequent serious events
Showing 10 of 15
Most frequent serious events
EventCannabidiol OS
Enterovirus infectionInfections and infestations2/9
PneumoniaInfections and infestations2/9
Rhinovirus infectionInfections and infestations2/9
Acute respiratory failureRespiratory, thoracic and mediastinal disorders1/9
HypoxiaRespiratory, thoracic and mediastinal disorders1/9
Pneumonia aspirationRespiratory, thoracic and mediastinal disorders1/9
Respiratory distressRespiratory, thoracic and mediastinal disorders1/9
Respiratory failureRespiratory, thoracic and mediastinal disorders1/9
DiarrhoeaGastrointestinal disorders1/9
Urinary retentionRenal and urinary disorders1/9
Most frequent other events
Showing 10 of 35
Most frequent other events
EventCannabidiol OS
Upper respiratory tract congestionRespiratory, thoracic and mediastinal disorders3/9
PyrexiaGeneral disorders2/9
IrritabilityPsychiatric disorders2/9
Blood triglycerides increasedInvestigations2/9
AnaemiaBlood and lymphatic system disorders2/9
Urinary tract infectionInfections and infestations2/9
HypertensionVascular disorders1/9
HypotensionVascular disorders1/9
Drug toleranceGeneral disorders1/9
Sleep disorderPsychiatric disorders1/9

Baseline characteristics

Age, Continuous
Age, Continuous(years)GWP42003-P OS
Mean12.2 ± 5.56
Age, Customized
Age, Customized(Participants)GWP42003-P OS
Infants and toddlers (28 days-23 months)9
Sex: Female, Male
Sex: Female, Male(Participants)GWP42003-P OS
Female6
Male3
Race (NIH/OMB)
Race (NIH/OMB)(Participants)GWP42003-P OS
American Indian or Alaska Native0
Asian0
Native Hawaiian or Other Pacific Islander0
Black or African American0
White8
More than one race0
Unknown or Not Reported1
08

Study locations

7 sites
  • Arkansas Children's Hospital
    Little Rock, Arkansas 72202, United States
  • Wake Forest Baptist Medical Center
    Winston-Salem, North Carolina 27157, United States
  • Nationwide Children's Hospital
    Columbus, Ohio 43205, United States
  • Le Bonheur Children's Hospital
    Memphis, Tennessee 38103, United States
  • Valley Health Clinical Research
    Winchester, Virginia 22601, United States
  • Uniwersyteckie Centrum Kliniczne
    Gdańsk, Poland
  • Centrum Medyczne POMOC
    Łódź, Poland
09

References and documents

Study documents

  • Study protocol · Sep 20, 2016
  • Statistical analysis plan · Sep 25, 2019

Documents are hosted by the registry — open the source record to download them.

10

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Sep 2, 2022, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
11

Registry details

Key details

Study ID
NCT02954887
Lead sponsor
Jazz Pharmaceuticals
Responsible party
Sponsor
First posted
Nov 4, 2016
Start date
May 12, 2017
Primary completion
Jun 13, 2019
Completion
Jun 13, 2019
Results posted
Jul 23, 2020
Last update
Sep 2, 2022

Oversight

Data monitoring committee
No
FDA-regulated drug
Yes
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

Not currently enrolling

This study is completed, as verified in Aug 2022. You cannot join it, but the record below documents what was studied.

Follow this study

Get an email when the registry record changes — status, dates, results — or when someone posts here.

Sign in to follow

Discussion

Questions and observations about this study, from anyone following it. Not medical advice, and not a channel to the study team — their contact details are on the registry record.

Sign in to join the discussion. Reading takes no account; posting does. You choose a display name, and a pseudonym is the default.

Nothing here yet. If you are running this trial, taking part in it, or weighing whether to, this is the place to say so.

Start the discussion