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A Study of the Efficacy and Safety of Topiramate Treatment in Patients With Epilepsy

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details. Identifier: NCT00266591
Recruitment Status : Completed
First Posted : December 19, 2005
Last Update Posted : June 8, 2011
Information provided by:
Johnson & Johnson Pharmaceutical Research & Development, L.L.C.

Tracking Information
First Submitted Date  ICMJE December 16, 2005
First Posted Date  ICMJE December 19, 2005
Last Update Posted Date June 8, 2011
Study Start Date  ICMJE October 1992
Primary Completion Date Not Provided
Current Primary Outcome Measures  ICMJE
 (submitted: December 16, 2005)
Time to patient exit (withdrawal) from the double-blind phase of the study, based on 4 pre-established exit criteria corresponding to therapeutic failure.
Original Primary Outcome Measures  ICMJE Same as current
Change History
Current Secondary Outcome Measures  ICMJE
 (submitted: December 16, 2005)
Investigator and patient global evaluation of the clinical response; safety evaluations conducted throughout the study (incidence and severity of adverse events, changes in physical and neurological examinations, laboratory tests)
Original Secondary Outcome Measures  ICMJE Same as current
Current Other Pre-specified Outcome Measures Not Provided
Original Other Pre-specified Outcome Measures Not Provided
Descriptive Information
Brief Title  ICMJE A Study of the Efficacy and Safety of Topiramate Treatment in Patients With Epilepsy
Official Title  ICMJE Single Center TOPAMAX� (Topiramate) Monotherapy Trial in Subjects With Refractory Partial Onset Seizures
Brief Summary The purpose of this study is to evaluate the effectiveness and safety of topiramate (an antiepileptic medication) in patients with epilepsy.
Detailed Description Epilepsy is a disease characterized by seizures, which are abnormal electrical discharges in the brain that temporarily disrupt normal brain function. Seizures are classified as "generalized," originating in both sides of the brain at the same time, or "partial onset," starting in one area of the brain. Antiepileptic medications, such as topiramate, are selected based on a patient's seizure type. The specific type of seizure is not always obvious at the time of diagnosis. This is a randomized, double-blind, parallel-group study to evaluate the effectiveness and safety of two doses of topiramate (100 or 1000 mg per day) in patients with partial onset seizures. The study is composed of three phases: an 8-week baseline phase during which patients take their standard antiepileptic drugs, a 1-week open-treatment phase during which patients continue standard antiepileptic drugs and add on topiramate (100 mg/day), and a double-blind treatment phase. The double-blind phase is divided into two periods: a 5-week conversion period and an 11-week treatment period with topiramate. In the conversion period, patients gradually discontinue their baseline antiepileptic drugs. Those assigned to the topiramate 1000 mg/day group start by taking the 100 mg/day dose and gradually increase to 1000 mg/day (or to their maximum tolerated dose) over a 5-week period. Patients assigned to topiramate 100 mg/day receive one 100 mg tablet (plus placebo tablets to maintain the blind during the 5 week period). Patients in both groups continue with their dose for the 11-week treatment period. Patients are provided with diaries to record information regarding any seizures occurring during the study. The primary assessment of effectiveness is the amount of time the patient receives topiramate in the double-blind treatment phase before exiting (withdrawing) from the study. Four exit criteria for withdrawal are designed to correspond to therapeutic failure and to ensure subject safety: i) a doubling of the average monthly (28-day) seizure frequency compared to baseline; ii) a doubling of the highest two-day seizure frequency that occurred during baseline; iii) a single generalized seizure if none occurred during the baseline phase; iv) or prolongation of generalized seizure duration (serial seizures or status epilepticus) as compared to the baseline phase seizure duration and requiring intervention. Safety assessments during the study include the frequency and severity of adverse events, results of clinical laboratory tests (hematology, biochemistry, and urinalysis), blood gastrin levels, measurements of vital signs and body weight, patient global evaluations of study drug tolerability, neurologic examinations, neuropsychologic tests, and physical examination findings. Based on the investigator's judgment, all patients completing the study could be enrolled into an open-label extension phase, during which patients know the identity and dose of topiramate. The study hypothesis is that the 1000 mg/day dose of topiramate is superior to the 100 mg/day dose in the amount of time before patients exit (withdraw based on pre-established exit criteria corresponding to therapeutic failure) from the double-blind phase. 100 mg/day group: one Topiramate 100 mg oral tablet (plus placebo tablets to maintain the blind) for 16 weeks. 1000 mg/day group: starting with one Topiramate 100 mg oral tablet and gradually increasing to 1000 mg/day (or maximum tolerated dose) over 5 weeks, and continuing that dose for 11 weeks.
Study Type  ICMJE Interventional
Study Phase  ICMJE Phase 3
Study Design  ICMJE Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Double
Primary Purpose: Treatment
Condition  ICMJE
  • Epilepsy
  • Seizures
Intervention  ICMJE Drug: topiramate
Study Arms  ICMJE Not Provided
Publications * Not Provided

*   Includes publications given by the data provider as well as publications identified by Identifier (NCT Number) in Medline.
Recruitment Information
Recruitment Status  ICMJE Completed
Actual Enrollment  ICMJE
 (submitted: January 13, 2011)
Original Enrollment  ICMJE
 (submitted: December 16, 2005)
Actual Study Completion Date  ICMJE April 1997
Primary Completion Date Not Provided
Eligibility Criteria  ICMJE

Inclusion Criteria:

  • Body weight >90 pounds
  • documented history of frequent partial onset seizures
  • at least four partial onset seizures per month while taking a constant antiepileptic drug dosage during the screening period
  • a recent history of maintenance on 1 or 2 standard antiepileptic drugs
  • females must be postmenopausal for at least 1 year, or if of childbearing age, be sexually abstinent, surgically sterile, or using adequate birth control measures, and have a negative pregnancy test before study entry.

Exclusion Criteria:

  • Patients who do not have epilepsy, such as patients with treatable causes of seizure (for example, cancer or active infection)
  • have a documented history (previous 3 months) of generalized status epilepticus while receiving anticonvulsant medication (status epilepticus is a prolonged seizure or seizures repeated frequently over 20 to 30 minutes so that recovery between episodes does not occur)
  • have seizures occurring in only clustered patterns (numerous seizures over a short period of time)
  • a significant history (within 2 years) of medical disease (heart, kidney, hormone, gynecologic, muscle, bone, gastrointestinal, metabolic, liver diseases or cancer with a metastatic potential)
  • history of alcohol or drug abuse history within the past 1 year.
Sex/Gender  ICMJE
Sexes Eligible for Study: All
Ages  ICMJE 14 Years and older   (Child, Adult, Older Adult)
Accepts Healthy Volunteers  ICMJE No
Contacts  ICMJE Contact information is only displayed when the study is recruiting subjects
Listed Location Countries  ICMJE Not Provided
Removed Location Countries  
Administrative Information
NCT Number  ICMJE NCT00266591
Other Study ID Numbers  ICMJE CR005470
Has Data Monitoring Committee Not Provided
U.S. FDA-regulated Product Not Provided
IPD Sharing Statement  ICMJE Not Provided
Responsible Party Not Provided
Study Sponsor  ICMJE Johnson & Johnson Pharmaceutical Research & Development, L.L.C.
Collaborators  ICMJE Not Provided
Investigators  ICMJE
Study Director: Johnson & Johnson Pharmaceutical Research & Development, L.L. C. Clinical Trial Johnson & Johnson Pharmaceutical Research & Development, L.L.C.
PRS Account Johnson & Johnson Pharmaceutical Research & Development, L.L.C.
Verification Date January 2011

ICMJE     Data element required by the International Committee of Medical Journal Editors and the World Health Organization ICTRP