A Study to Assess the Efficacy and Safety of Adjunctive Zonisamide in Paediatric Partial Onset Seizures (CATZ Extension Study)

This study has been completed.
Sponsor:
Information provided by (Responsible Party):
Eisai Inc. ( Eisai Limited )
ClinicalTrials.gov Identifier:
NCT01136954
First received: May 26, 2010
Last updated: June 26, 2014
Last verified: January 2013
  Purpose

The purpose of this study is to assess the long-term safety and efficacy of zonisamide used as an adjunctive treatment in pediatric subjects treated with 1 or 2 other anti-epileptic drugs (AEDs).


Condition Intervention Phase
Partial Seizures
Drug: Zonisamide
Phase 3

Study Type: Interventional
Study Design: Allocation: Non-Randomized
Endpoint Classification: Safety/Efficacy Study
Intervention Model: Single Group Assignment
Masking: Open Label
Primary Purpose: Treatment
Official Title: An Open-label Extension Study Following a Double-blind, Randomized, Placebo-controlled, Multi-centre Study to Assess the Efficacy and Safety of Adjunctive Zonisamide in Pediatric Partial Onset Seizures

Resource links provided by NLM:


Further study details as provided by Eisai Inc.:

Primary Outcome Measures:
  • Treatment Emergent Non-Serious Adverse Events With Greater Than 5% Frequency [ Time Frame: Week 1 through Week 59 ] [ Designated as safety issue: No ]
    Treatment Emergent Adverse Event (TEAE) is defined as an Adverse Event with a start date on or after Day 1 and within 15 days of last dose. For each event, each participant experiencing an event is only counted once even if they had multiple episodes.


Secondary Outcome Measures:
  • Percentage of Participants With a Decrease From Baseline in 28-day Seizure Frequency of =50%(Responder) in the Open Label Period [ Time Frame: Baseline through Week 59 ] [ Designated as safety issue: No ]
    A participant with a decrease from baseline in seizure frequency of =50 % was considered a responder. Participants'parent or guardian maintained a seizure diary recording the date,number, and type of seizures the subject had. The primary analysis assessed the percent of responders from baseline in the Open Label Visit Period. Seizure frequency of simple partial, complex partial, and partial seizures with secondary generalization were assessed.

  • Median Change From Study 312 Baseline in the 28-day Seizure Frequency During the Open Label Period [ Time Frame: Baseline of study 312 (Week -8 to Week 0) to Week 59 of study 313 ] [ Designated as safety issue: No ]
    Participants' parent or guardian maintained a seizure diary recording the date, number, and type of seizures the subject had. Seizure frequency of simple partial, complex partial, and partial seizures with secondary generalization were assessed from baseline of study 312 through the Open Label Visit Period.

  • Median Percent Change From Study 312 Baseline in the 28-day Seizure Frequency During the Open Label Period [ Time Frame: Baseline of study 312 (Week -8 to Week 0) to Week 59 of study 313 ] [ Designated as safety issue: No ]
    Participants' parent or guardian maintained a seizure diary recording the date, number, and type of seizures the subject had. Seizure frequency of simple partial, complex partial, and partial seizures with secondary generalization were assessed from baseline of study 312 through the Open Label Visit Period. Percentage change = 100% x (seizure frequency at period - seizure frequency at Study 312 baseline)/seizure frequency at Study 312 baseline.


Enrollment: 144
Study Start Date: July 2008
Study Completion Date: March 2012
Primary Completion Date: January 2012 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Experimental: 1 Drug: Zonisamide
Transition Period from Study E2090-E044-312: Placebo Open-Label Period: 1 to 8 mg/kg orally per day for approximately 59 weeks.
Other Name: Zonegran

Detailed Description:

Those subjects who completed the double-blind study (E2090-E044-312) will be invited to participate in this extension study. The study consists of two main parts: Transition Period (double-blind) and Open Label Period. The study will start with the Transition Period during which subjects already on zonisamide will continue on the same dose of zonisamide and those who were taking placebo will be up-titrated to an appropriate dose of zonisamide. After all subjects have completed the Transition Period, the study will become open-label with every subject on the study receiving zonisamide. The study medication will be taken once daily in the evening. For those subjects previously in the placebo group, dosing with zonisamide will start with a dose of approximately 1 mg/kg. In order that the blind is maintained from the previous study, these subjects will initially continue taking the same number of placebo capsules as they were taking in the Maintenance Period of the E2090-E044-312 study until the up- titration is completed. Those subjects previously in the zonisamide arm will continue on the same dose which they received during the Maintenance Period of the E2090-E044-312 study. In order that the blind is maintained, they will also take placebo capsules in order to mirror the up- titration dose regimen of the subjects previously randomized to receive placebo in the E2090-E044-312 study. All subjects will stop taking placebo capsules after the Transition Period is complete. The duration of the Transition Period depends on the dose the subject appeared to have received when completing the core study E2090-E044-312. For those who completed on 8 mg/kg, the Transition Period will last 7 weeks. For those on 6 mg/kg, the Transition Period will last 5 weeks. However, during the double-blind Transition Period, some subjects may experience adverse events (AEs). If this should occur, the subject may be down titrated to one level above the minimal dose. The overall duration of the study will be up to 59 weeks. The overall duration of the Transition Period may thus be as short as 2 weeks or prolonged to as many as 11 weeks.

The Open Label Period will continue for up to a maximum of 59 weeks (approximately 15 months).

At the end of the study, Eisai will continue to supply zonisamide as part of this open-label extension protocol until the marketing authorisation of zonisamide for this indication or further development in this indication is stopped. In countries where no marketing authorisation will be applied for, Eisai has a compassionate use policy which can be applied for, if required.

  Eligibility

Ages Eligible for Study:   6 Years to 18 Years
Genders Eligible for Study:   Both
Accepts Healthy Volunteers:   No
Criteria

INCLUSION CRITERIA:

  1. Subject has completed the double-blind study E2090-E044-312.
  2. Parent/caregiver is willing to sign an informed consent where the subject is under the age of consent.
  3. Subject is male or female aged 6 to 18 years who is willing to give informed (written or verbal) assent, if applicable. If mandated by local regulations, subjects of relevant age will be required to sign an appropriate informed consent.
  4. Subject is in general good health as determined by medical history, physical exam and screening laboratory results.

EXCLUSION CRITERIA:

  1. Subject has a body weight < 20 kg.
  2. Subject has developed a history of renal calculi or renal insufficiency (creatinine level > 135 µmol/l (1.5 mg/dl).
  3. Subject has a known diagnosis of human immunodeficiency virus (HIV) or hepatitis B or C.
  4. Subject has a history of sensitivity to sulfonamide drugs or zonisamide and its excipients.
  5. Female subject of 10 years of age or greater, or of child bearing potential (i.e. started menses) and is not taking or prepared to take a medically acceptable form of contraception (i.e. oral contraceptive pill, surgical sterilization, an implant or injected form of contraception, or intrauterine device), or who is not prepared to abstain from sexual activity for the duration of the study and for one month after the last administration of study medication. NOTE: Should a female subject become of child bearing potential during the study, they must be reconsented in order to given consent to undergo pregnancy testing and either confirm abstinence or receive a medically appropriate form of contraception.
  6. Subject has a recent history of excessive alcohol use or drug abuse.
  7. Subject has a history of suicide attempt.
  8. Subject has a clinically significant organic disease.
  9. Subject has a history of demonstrated non-compliance with treatment or subject or parent/legal guardian can be reasonably expected not to be compliant with study procedures or to complete the study.
  10. Frequent need of rescue benzodiazepines (one or more times a month).
  11. Concomitant use of acetazolamide, carbonic anhydrase inhibitors such as topiramate, furosemide and drugs with anticholinergic activity.
  12. Concomitant use of felbamate or use of felbamate within 2 months prior to Visit 1 of the E2090-E044-312 study.
  Contacts and Locations
Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the Contacts provided below. For general information, see Learn About Clinical Studies.

Please refer to this study by its ClinicalTrials.gov identifier: NCT01136954

Locations
Italy
Firenze, 50132, FI, Italy, 50132
Sponsors and Collaborators
Eisai Limited
Investigators
Study Director: Rob van Maanen, M.D., MFPM Eisai Limited
  More Information

No publications provided

Responsible Party: Eisai Inc. ( Eisai Limited )
ClinicalTrials.gov Identifier: NCT01136954     History of Changes
Other Study ID Numbers: E2090-E044-313, 2007-000198-53
Study First Received: May 26, 2010
Results First Received: November 12, 2012
Last Updated: June 26, 2014
Health Authority: European Union: Ethics Committee (EC) and CA (Competent Authority?) in 9 European Countries

Additional relevant MeSH terms:
Seizures
Epilepsy
Brain Diseases
Central Nervous System Diseases
Nervous System Diseases
Neurologic Manifestations
Signs and Symptoms
Zonisamide
Anticonvulsants
Central Nervous System Agents
Therapeutic Uses
Pharmacologic Actions
Antioxidants
Molecular Mechanisms of Pharmacological Action
Protective Agents
Physiological Effects of Drugs

ClinicalTrials.gov processed this record on August 26, 2014