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Sponsors and Collaborators: |
Johnson & Johnson Pharmaceutical Research & Development, L.L.C. Ortho-McNeil Neurologics, Inc. |
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Information provided by: | Johnson & Johnson Pharmaceutical Research & Development, L.L.C. |
ClinicalTrials.gov Identifier: | NCT00236496 |
The purpose of this study is to assess the safety and effectiveness of topiramate as compared to placebo in treating patients with tremor of unknown cause.
Condition | Intervention | Phase |
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Essential Tremor |
Drug: topiramate |
Phase III |
Study Type: | Interventional |
Study Design: | Treatment, Randomized, Double-Blind, Placebo Control, Parallel Assignment, Safety/Efficacy Study |
Official Title: | A Comparison of the Efficacy and Safety of Topiramate Versus Placebo in the Treatment of Essential Tremor |
Estimated Enrollment: | 200 |
Study Start Date: | October 2001 |
Estimated Study Completion Date: | February 2004 |
Essential tremor is a very common form of tremor, occurring in up to 5% of people. It may be inherited. In 90% of patients, the tremor is in the hands; however, it can also be in the head, voice, legs, jaw, and tongue. Essential tremor may be treated by the blood pressure medicine propranolol or the anti-seizure drug primidone. The drawbacks of these drugs are that they tend to lose effectiveness over time, and they may cause side effects. Researchers believe that topiramate, an anti-seizure drug, may be effective in treating essential tremor. In this double blind, placebo-controlled study, patients with essential tremor will start at a low dose of topiramate (25 milligrams) or placebo. The dose will be gradually increased over 12 weeks to a maximum of 400 milligrams daily, taken in two divided doses. Then, each patient will stay on the established dose for the next 12 weeks. During the next phase of the study, the patients will slowly reduce the dose until they stop taking the study drug, after which, patients have the option of taking up to 600 milligrams of topiramate (not placebo) in a 14-week extension of the study. This study was designed to investigate the hypothesis that topiramate will be more effective than placebo in the treatment of essential tremor as measured by the Clinical Rating Scale for Tremor (TRS) and is well tolerated. The TRS is a three part scale that measures tremor location/severity rating, specific motor tasks/function rating, and functional disabilities resulting from tremor. Safety evaluations are assessed throughout the study.
Topiramate or placebo, starting with a dose of 25 mg, then gradually increased over 12 weeks up to 400 mg daily (two 100-mg tablets taken by mouth twice a day) and continued on this dose for 12 weeks in the maintenance phase; up to 600 milligrams of topiramate in the open-label phase.
Ages Eligible for Study: | 18 Years to 80 Years |
Genders Eligible for Study: | Both |
Accepts Healthy Volunteers: | No |
Inclusion Criteria:
Exclusion Criteria:
Study Director: | Johnson & Johnson Pharmaceutical Research and Development, L.L.C. Clinical Trial | Johnson & Johnson Pharmaceutical Research & Development, L.L.C. |
Study ID Numbers: | CR002659 |
Study First Received: | October 7, 2005 |
Last Updated: | May 11, 2007 |
ClinicalTrials.gov Identifier: | NCT00236496 |
Health Authority: | United States: Food and Drug Administration |
tremor essential tremor |
Signs and Symptoms Essential Tremor Movement Disorders Benign essential tremor syndrome Topiramate |
Central Nervous System Diseases Neurologic Manifestations Dyskinesias Tremor |
Anti-Obesity Agents Therapeutic Uses Physiological Effects of Drugs Nervous System Diseases Protective Agents |
Neuroprotective Agents Central Nervous System Agents Pharmacologic Actions Anticonvulsants |