Clobazam as Adjunctive Therapy in Paediatric Patients Aged ≥1 to ≤16 Years With Dravet Syndrome

September 23, 2015 updated by: H. Lundbeck A/S

Multi-site, Prospective, Randomised, Double-blind, Placebo-controlled, Parallel-group, Interventional Study to Evaluate the Efficacy, Safety, and Tolerability of Clobazam as Adjunctive Therapy in Paediatric Patients Aged ≥1 to ≤16 Years With Dravet Syndrome

The purpose of this study is to investigate the effect on the frequency of tonic-clonic and clonic seizures of clobazam as adjunctive therapy compared to placebo after 16 weeks of treatment in paediatric patients aged ≥1 to ≤16 years with Dravet Syndrome.

Study Overview

Status

Status

Indicates the current recruitment status or the expanded access status.
Withdrawn

Conditions

Conditions

The disease, disorder, syndrome, illness, or injury that is being studied. On ClinicalTrials.gov, conditions may also include other health-related issues, such as lifespan, quality of life, and health risks.

Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.

Study Type

Study Type

Describes the nature of a clinical study. Study types include interventional studies (also called clinical trials), observational studies (including patient registries), and expanded access.
Interventional

Phase

Phase

The stage of a clinical trial studying a drug or biological product, based on definitions developed by the U.S. Food and Drug Administration (FDA). The phase is based on the study's objective, the number of participants, and other characteristics. There are five phases: Early Phase 1 (formerly listed as Phase 0), Phase 1, Phase 2, Phase 3, and Phase 4. Not Applicable is used to describe trials without FDA-defined phases, including trials of devices or behavioral interventions.
  • Phase 3

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • Mexico
      • Guadalajara, Mexico
        • MX003
  • United States
    • California
      • Los Angeles, California, United States
        • US010
    • Florida
      • Orlando, Florida, United States
        • US001
    • Minnesota
      • Rochester, Minnesota, United States
        • US003
    • Missouri
      • Kansas City, Missouri, United States
        • US005
    • Texas
      • Dallas, Texas, United States
        • US0011
      • Dallas,, Texas, United States
        • US006
      • Houston, Texas, United States
        • US002
    • Washington
      • Seattle, Washington, United States
        • US004

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Eligibility Criteria

The key requirements that people who want to participate in a clinical study must meet or the characteristics they must have. Eligibility criteria consist of both inclusion criteria (which are required for a person to participate in the study) and exclusion criteria (which prevent a person from participating). Types of eligibility criteria include whether a study accepts healthy volunteers, has age or age group requirements, or is limited by sex.

Ages Eligible for Study

1 year to 16 years (Child)

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Description

Inclusion Criteria:

  • Onset of seizures in the first year of life
  • History of fever-induced prolonged seizures as determined by the Investigator
  • These may include prolonged (approximately 15 minutes or longer) hemi-clonic seizures

  • Multiple seizure types which may include:

    • generalised tonic-clonic (required for inclusion)
    • clonic (required for inclusion)
    • myoclonic jerks/seizures
    • history of normal development prior to seizure onset followed by development delay or regression after seizure onset
    • abnormal EEG consistent with Dravet Syndrome 2. The patient has a history of approximately 2 tonic-clonic or clonic seizures in 2 weeks 3. The patient is treated with at least 1 but no more than 3 antiepileptic drugs (AEDs) [Vagal Nerve Stimulator (VNS) and ketogenic diet will not be considered an AED] 4. Patient has at least 2 seizures during the Baseline Period of either 2 or 4 weeks

Exclusion Criteria:

  1. The patient is taking stiripentol, verapamil, or felbatol. If patients have taken these drugs in the past, they need to have been off drug for 5 half-lives
  2. The patient is taking a sodium channel blocker including, but not limited to, phenytoin, fosphenytoin, carbamazepine, oxcarbamazepine, lamotrigine, lacosamide, and rufinamide. If patients have taken these drugs in the past, they need to have been off drug for 5 half-lives
  3. The patient is on cannabidiol, medical marijuana, or any drug that contains cannabinoids
  4. The patient has received chronic treatment (≥2 weeks for any indication) with a benzodiazepine within at least 5 half-lives prior to screening. Rescue therapy for prolonged seizures is allowed
  5. The patient has received clobazam within 3 months prior to the Screening Visit. If the patient has received clobazam in the past, discontinuation must not have been for adverse events or lack of efficacy

Other protocol-defined inclusion and exclusion criteria may apply.

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Treatment
  • Allocation: Randomized
  • Interventional Model: Parallel Assignment
  • Masking: Triple

Arms and Interventions

Participant Group / Arm

Participant Group / Arm

A group or subgroup of participants in a clinical trial that receives a specific intervention/treatment, or no intervention, according to the trial's protocol.
Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.
Experimental: Clobazam
Clobazam - 1.0, 1.5 or 2.0 mg/kg/day (maximum 60 or 80 mg/day) twice daily (BID); Clobazam oral suspension 2.5 mg/mL, clobazam scored tablets 10 mg, orally
Drug: Clobazam
Other Names:
  • Onfi®
Placebo Comparator: Placebo
Placebo to clobazam oral suspension 2.5 mg/mL and placebo to clobazam scored tablets 10 mg, orally
Drug: Placebo

What is the study measuring?

Primary Outcome Measures

Primary Outcome Measures

In a clinical study's protocol, the planned outcome measure that is the most important for evaluating the effect of an intervention/treatment. Most clinical studies have one primary outcome measure, but some have more than one.
Outcome Measure
Time Frame
Percent change from baseline to study completion/withdrawal in seizure rate for combined tonic-clonic and clonic seizure rates, based upon a calculation of seizure frequency determined from daily seizure diary counts
Time Frame: Baseline and from week 0 to week 16
Baseline and from week 0 to week 16

Secondary Outcome Measures

Secondary Outcome Measures

In a clinical study's protocol, a planned outcome measure that is not as important as the primary outcome measure for evaluating the effect of an intervention but is still of interest. Most clinical studies have more than one secondary outcome measure.
Outcome Measure
Time Frame
Percent change from baseline to study completion/withdrawal in seizure rate for combined tonic-clonic and clonic seizure rates, based upon a calculation of seizure frequency determined from daily seizure diary counts during 4 weeks of maintenance
Time Frame: Baseline and from week 4 to week 16
Baseline and from week 4 to week 16
Percent change in seizure rate for myoclonic seizures determined from daily seizure diary counts
Time Frame: Baseline and from week 0 to week 16
Baseline and from week 0 to week 16
Percent change in seizure rate for atypical absence seizures determined from daily seizure diary counts
Time Frame: Baseline and from week 0 to week 16
Baseline and from week 0 to week 16
Percent change in seizure rate for complex partial seizures determined from daily seizure diary counts
Time Frame: Baseline and from week 0 to week 16
Baseline and from week 0 to week 16
Percent change in seizure rate for all seizure types determined from daily seizure diary counts
Time Frame: Baseline and from week 0 to week 16
Baseline and from week 0 to week 16
Number of initial treatment responders who returned to their baseline tonic-clonic and clonic seizure rate during the study (an assessment of tachyphylaxis)
Time Frame: Baseline and from week 0 to week 16
Baseline and from week 0 to week 16
Percentage of initial treatment responders who returned to their baseline tonic-clonic and clonic seizure rate during the study (an assessment of tachyphylaxis)
Time Frame: Baseline and from week 0 to week 16
Baseline and from week 0 to week 16
Percent change in seizure rate for myoclonic seizures determined from video EEG
Time Frame: Baseline and from week 0 to week 16
Baseline and from week 0 to week 16
Percent change in seizure rate for atypical absence seizures determined from video EEG
Time Frame: Baseline and from week 0 to week 16
Baseline and from week 0 to week 16
Change in Symptom and Seizure Activity Scale (Investigator and Parent/caregiver versions)
Time Frame: Baseline and from week 0 to week 16
Baseline and from week 0 to week 16
Number of Participants with Adverse Events as a Measure of Safety and Tolerability
Time Frame: Up to Week 32
Up to Week 32
Columbia Suicide Severity Rating Scale (C-SSRS), categorisation based on Columbia Classification Algorithm of Suicide Assessment (C-CASA) categories (1, 2, 3, 4 and 7) for patients aged ≥ 6 years
Time Frame: Baseline and from week 0 to week 16
Baseline and from week 0 to week 16
Number of Participants with Adverse Events of special interest as a Measure of Safety and Tolerability based on dose
Time Frame: Baseline and Week 32
Baseline and Week 32
Change in Vineland Adaptive Behaviour Scale (VABS) - all adaptive behavior sub-domains and maladaptive behaviors
Time Frame: Baseline and from week 0 to week 16
Baseline and from week 0 to week 16

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Sponsor

The organization or person who initiates the study and who has authority and control over the study.
H. Lundbeck A/S

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start

Study Start

The actual date on which the first participant was enrolled in a clinical study. The "anticipated" study start date is the date that the researchers think will be the study start date.
March 1, 2015

Primary Completion (Actual)

Primary Completion

The date on which the last participant in a clinical study was examined or received an intervention to collect final data for the primary outcome measure. Whether the clinical study ended according to the protocol or was terminated does not affect this date. For clinical studies with more than one primary outcome measure with different completion dates, this term refers to the date on which data collection is completed for all the primary outcome measures. The "anticipated" primary completion date is the date that the researchers think will be the primary completion date for the study.
August 1, 2015

Study Completion (Actual)

Study Completion

The date on which the last participant in a clinical study was examined or received an intervention/treatment to collect final data for the primary outcome measures, secondary outcome measures, and adverse events (that is, the last participant's last visit). The "anticipated" study completion date is the date that the researchers think will be the study completion date.
August 1, 2015

Study Registration Dates

First Submitted

First Submitted

The date on which the study sponsor or investigator first submitted a study record to ClinicalTrials.gov. There is typically a delay of a few days between the first submitted date and the record's availability on ClinicalTrials.gov (the first posted date).
June 2, 2014

First Submitted That Met QC Criteria

First Submitted That Met QC Criteria

The date on which the study sponsor or investigator first submits a study record that is consistent with National Library of Medicine (NLM) quality control (QC) review criteria. The sponsor or investigator may need to revise and submit a study record one or more times before NLM's QC review criteria are met. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
June 24, 2014

First Posted (Estimate)

First Posted

The date on which the study record was first available on ClinicalTrials.gov after National Library of Medicine (NLM) quality control (QC) review has concluded. There is typically a delay of a few days between the date the study sponsor or investigator submitted the study record and the first posted date.
June 25, 2014

Study Record Updates

Last Update Posted (Estimate)

Last Update Posted

The most recent date on which changes to a study record were made available on ClinicalTrials.gov. There may be a delay between when the changes were submitted to ClinicalTrials.gov by the study's sponsor or investigator (the last update submitted date) and the last update posted date.
September 24, 2015

Last Update Submitted That Met QC Criteria

Last Update Submitted That Met QC Criteria

The most recent date on which the study sponsor or investigator submitted changes to a study record that are consistent with National Library of Medicine (NLM) quality control (QC) review criteria. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
September 23, 2015

Last Verified

Last Verified

The most recent date on which the study sponsor or investigator confirmed the information about a clinical study on ClinicalTrials.gov as accurate and current. If a study with a recruitment status of recruiting; not yet recruiting; or active, not recruiting has not been confirmed within the past 2 years, the study's recruitment status is shown as unknown.
September 1, 2015

More Information

Terms related to this study

Additional Relevant MeSH Terms

Other Study ID Numbers

Other Study ID Numbers

Identifiers or ID numbers other than the NCT number that are assigned to a clinical study by the study's sponsor, funders, or others. These numbers may include unique identifiers from other trial registries and National Institutes of Health grant numbers.
  • 14362A

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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