A Phase 3 interventional study of topiramate in Essential Tremor, sponsored by Johnson & Johnson Pharmaceutical Research & Development, L.L.C.. Completed. Open to participants aged 18 Years to 80 Years. Per ClinicalTrials.gov, last updated 2011-06-10.
Sponsored by Johnson & Johnson Pharmaceutical Research & Development, L.L.C. · Phase 3, Interventional, and Treatment
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.
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.
257 studies on the registry are indexed under Tremor; 59 are open to participants now.
This study's enrollment of 223 is above the median of 25 across 184 interventional studies indexed under Tremor.
Browse Tremor studies →Johnson & Johnson Pharmaceutical Research & Development, L.L.C. is the lead sponsor of 458 studies on the registry; none are open to participants now.
Counted across the registry records on this site, refreshed daily.
Exclusion Criteria:
Clinical Rating Scale for Tremor (TRS) score at Visit 8 (or patient's final visit) of the double-blind phase
TRS subscale scores; composite normalized score; overall TRS score; patient and investigator assessment scores.
No study locations are listed for this record.
This study is completed, as verified in Apr 2010. You cannot join it, but the record below documents what was studied.
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Johnson & Johnson Pharmaceutical Research & Development, L.L.C.