A Study of the Efficacy and Safety of Topiramate in the Prevention of Migraine

A Randomized, Double-Blind, Placebo-Controlled, Parallel Group, Dose-Response Study to Evaluate the Efficacy and Safety of Topiramate in the Prophylaxis of Migraine

The purpose of this study is to evaluate the safety and efficacy of three doses of topiramate (50 milligrams[mg], 100mg, and 200mg taken daily) compared with placebo in the prevention of migraine.

Study Overview

Status

Completed

Intervention / Treatment

Detailed Description

This is a randomized, double-blind, placebo-controlled, parallel-group, multi-center study to evaluate the effectiveness and safety of three different doses of topiramate (50mg, 100mg, and 200mg daily) in migraine prophylaxis. The study consists of five phases: baseline (determination of whether patients meet the eligibility criteria and tapering of any migraine medication patients are already taking); initial titration and double-blind phase (8 weeks) which begins with 25 mg/daily increasing to the assigned (50, 100, 200 mg/day topiramate); followed by a maintenance period at the target dose (18 weeks); tapering transition phase (up to 7 weeks); and open-label extension up to 6 months (to a maximum topiramate dose of 1600 mg/day); doses are adjusted to maximize effectiveness and minimize side effects. The primary study hypothesis is that one or more of the three doses of topiramate (50, 100, 200 mg/day) will be superior to placebo in the prophylaxis of migraine based on the change in monthly (28 day) migraine period rate from the prospective baseline period to the double-blind phase and that topiramate treatment is well tolerated. During the titration period (8 weeks), doses are increased to target dose of daily topiramate (50 milligrams[mg], 100, or 200mg) or placebo, taken twice daily by mouth. Doses are continued for 18 weeks, adjusted over 7 weeks, and continued for up to 6 months during the Open-Label Extension.

Study Type

Interventional

Enrollment (Actual)

763

Phase

  • Phase 3

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

12 years to 65 years (Child, Adult, Older Adult)

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Description

Inclusion Criteria:

  • Medical history consistent with migraine with or without aura according to the International Headache Society (IHS) for at least 6 months prior to the study
  • Between 3 to 12 migraine periods and no greater than 15 headache days (migraine and non-migraine) per month during the Baseline Phase
  • No clinically significant abnormalities on neurological exams, electrocardiogram (ECG) or clinical laboratory test results at baseline
  • Female patients must be postmenopausal for at least 1 year, surgically incapable of childbearing, practicing abstinence, or practicing an acceptable method of contraception (requires negative pregnancy test)

Exclusion Criteria:

  • Patients with headaches other than migraine
  • Patients with episodic tension or sinus headaches
  • Onset of migraine after age of 50 years
  • Patients who have failed more than two adequate regimens for migraine prophylaxis
  • Patients who overuse pain medications or certain other medications

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: Double

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Changes in length of time between the onset and cessation of painful migraine symptoms (migraine period) from the baseline. Safety evaluations conducted throughout the study.

Secondary Outcome Measures

Outcome Measure
Proportion of patients responding to the treatment. Changes from baseline to double-blind phase in number of monthly migraine attacks, monthly migraine days, number of days/month requiring rescue medication, and Health-Related Quality of Life measures.

Collaborators and Investigators

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

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.

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

February 1, 2001

Study Completion (Actual)

September 1, 2002

Study Registration Dates

First Submitted

October 7, 2005

First Submitted That Met QC Criteria

October 7, 2005

First Posted (Estimate)

October 12, 2005

Study Record Updates

Last Update Posted (Estimate)

November 17, 2010

Last Update Submitted That Met QC Criteria

November 15, 2010

Last Verified

November 1, 2010

More Information

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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