An Open-Label Extension Study of the Effectiveness and Safety of the Investigational Compound RWJ-333369 in Patients With Epilepsy

January 15, 2013 updated by: SK Life Science, Inc.

A Double-Blind, Placebo-Controlled, Dose-Ranging Study to Evaluate the Efficacy, Safety, and Tolerability of RWJ-333369 as Adjunctive Therapy in Subjects With Refractory Partial Seizures (Protocol 333369-EPY-2003 [Double-blind] and Protocol 333369-EPY-2006 [Open-label Extension])

The purpose of this study is to evaluate the effectiveness and safety of the novel compound RWJ-333369 in reducing the frequency of seizures in patients with epilepsy.

Study Overview

Status

Completed

Conditions

Intervention / Treatment

Detailed Description

333369EPY2006 is the open-label extension study that follows the double-blind study 333369EPY2003. In an open label study such as 333369EPY2006, both the physician and the patient know the name of the assigned study medication. In a double blind study such as 333369EPY2003, neither the physician nor the patient knows the name of the assigned study medication. Patients who complete the double-blind treatment phase of study 333369EPY2003 will be eligible to enter the open-label extension study during which patients will transition through a blinded period to an open-label period with carisbamate (also referred to as RWJ-333369). RWJ-333369 is a new chemical compound with anticonvulsant activity that is currently under investigation as a treatment for epilepsy. Patients electing to enter the open-label extension phase will be supplied with both open-label carisbamate (RWJ-333369) and blinded study medication for the transition phase. During this transition phase (approximately 3 weeks in length), the patient's dose of double-blind study drug will be gradually reduced and stopped and treatment with open-label RWJ-333369 will be started. Throughout the remainder of the open label extension phase, investigators will be allowed to make further adjustments of the dosage and schedule of carisbamate, including independent adjustment of the morning and evening doses, but a dosage of 1,200 mg/day may not be exceeded and increases in dosage must be in increments of no more than 200 mg/day. After 12 months of participation in the open-label extension study, patients who, in the judgment of the investigator, continue to benefit from treatment with RWJ-333369 may continue to receive the drug with follow up clinic visits every 3 months until RWJ 333369 is available by prescription or the program is terminated by the sponsor. RWJ-333369 (100, 300, 800, or 1,600 milligrams per day) administered orally in 2 equally divided doses for up to 16 weeks of double-blind treatment followed by the option to continue RWJ-333369 treatment in an open-label study for at least 1 year, then until drug is available or production ceases.

Study Type

Interventional

Enrollment (Actual)

421

Phase

  • Phase 2

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

Ages Eligible for Study

18 years to 70 years (Adult, Older Adult)

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Description

Inclusion Criteria:

  • Patients must complete Visit 8 (Day 112) of the double-blind treatment phase of Study EPY-2003 to be eligible for entry into the open-label treatment phase of Study EPY-2006.

Exclusion Criteria:

  • Patients who have seizures that cannot be quantitated accurately
  • Patients with a history of nonepileptic seizures, serious systemic disease, progressive neurologic disorder, a major psychiatric disorder, status epilepticus in the past 3 months, vagal nerve stimulation discontinuation within the past 3 months
  • Patients with a history of drug or alcohol abuse within the past 2 years
  • Patients currently taking felbamate, vigabatrin, or tricyclic antidepressants
  • and patients who are pregnant or nursing.

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: Non-Randomized
  • Interventional Model: Single Group Assignment
  • Masking: None (Open Label)

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Experimental: 001
RWJ 333369 Open-Label Extension: One 200 mg to 600mg tablet taken twice daily (up to a maximum of 1200mg/day) up to 1 year or the time that RWJ-333369 is available by prescription or the study is terminated by Sponsor.
Drug: RWJ 333369
Open-Label Extension: One 200 mg to 600mg tablet taken twice daily (up to a maximum of 1200mg/day) up to 1 year or the time that RWJ-333369 is available by prescription or the study is terminated by Sponsor.

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Time Frame
Adverse events
Time Frame: Up to 1 year or until carisbamate is available by prescription or the study is terminated by the sponsor
Up to 1 year or until carisbamate is available by prescription or the study is terminated by the sponsor
Clinical laboratory test values
Time Frame: Up to 1 year or until carisbamate is available by prescription or the study is terminated by the sponsor
Up to 1 year or until carisbamate is available by prescription or the study is terminated by the sponsor
12-lead ECG recordings
Time Frame: Up to 1 year or until carisbamate is available by prescription or the study is terminated by the sponsor
Up to 1 year or until carisbamate is available by prescription or the study is terminated by the sponsor
Vital sign measurements
Time Frame: Up to 1 year or until carisbamate is available by prescription or the study is terminated by the sponsor
Up to 1 year or until carisbamate is available by prescription or the study is terminated by the sponsor

Collaborators and Investigators

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

Sponsor

SK Life Science, Inc.

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

General Publications

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

May 1, 2005

Primary Completion (Actual)

June 1, 2010

Study Completion (Actual)

June 1, 2010

Study Registration Dates

First Submitted

September 13, 2005

First Submitted That Met QC Criteria

September 13, 2005

First Posted (Estimate)

September 21, 2005

Study Record Updates

Last Update Posted (Estimate)

January 24, 2013

Last Update Submitted That Met QC Criteria

January 15, 2013

Last Verified

January 1, 2013

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • CR002191

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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