- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT00298623
XP13512 (GSK1838262) Versus Placebo in Patients With Restless Legs Syndrome.
May 10, 2013 updated by: XenoPort, Inc.
A Randomized, Double-Blind, Placebo-Controlled Study to Assess the Efficacy and Safety of XP13512 in Patients With Restless Legs Syndrome.
The primary objective of this trial is to assess the efficacy of XP13512 taken once daily compared to placebo for the treatment of patients suffering from Restless Legs Syndrome (RLS).
Study Overview
Status
Completed
Conditions
Intervention / Treatment
Study Type
Interventional
Enrollment (Actual)
222
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
18 years and older (Adult, Older Adult)
Accepts Healthy Volunteers
No
Genders Eligible for Study
All
Description
Inclusion Criteria:
- Patients with primary RLS, based on the International RLS Study Group Diagnostic Criteria.
- History of RLS symptoms at least 15 nights in the prior month or, if on treatment, this frequency of symptoms before treatment was started;
- Documented RLS symptoms for at least 4 of the 7 consecutive evenings/nights during the Baseline study period;
- Total RLS severity score of 15 or greater on the International Restless Legs Syndrome Study Group Rating Scale (IRLS rating scale) at Visit 1 and at Visit 2;
- Discontinuation of dopamine agonists and/or gabapentin at least 2 weeks prior to Baseline;
- Discontinuation of other treatments for RLS (e.g., opioids, benzodiazepines) at least 2 weeks prior to Baseline;
- If female of child-bearing potential, the subject must agree to use clinically accepted birth control through completion of the study;
- Body Mass Index of 34 or below;
- Estimated creatinine clearance of at least 60 mL/min;
Exclusion Criteria:
- A sleep disorder (e.g., sleep apnea) that may significantly affect the assessment of RLS;
- Neurologic disease or movement disorder (e.g., diabetic neuropathy, Parkinson's Disease, Multiple Sclerosis, dyskinesias, and dystonias);
- Abnormal laboratory results, electrocardiogram (ECG) or physical findings;
- Pregnant or lactating women;
- Women of childbearing potential who are not practicing an acceptable method of birth control.
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
Arms and Interventions
Participant Group / Arm |
Intervention / Treatment |
---|---|
Placebo Comparator: Placebo
|
|
Experimental: XP13512 (GSK1838262)
|
What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Time Frame |
---|---|
The change from baseline to the end of treatment in International Restless Legs Syndrome (IRLS) rating scale score.
Time Frame: 12-week treatment period
|
12-week treatment period
|
The proportion of subjects at the end of treatment who are "much improved" or "very much improved" on the Investigator-rated CGI of Improvement
Time Frame: 12-week treatment period
|
12-week treatment period
|
Secondary Outcome Measures
Outcome Measure |
Time Frame |
---|---|
Onset of efficacy. Subjective measures of sleep.
Time Frame: 12-week treatment period
|
12-week treatment period
|
Collaborators and Investigators
This is where you will find people and organizations involved with this study.
Sponsor
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
- Ahmed M, Hays R, Steven Poceta J, Jaros MJ, Kim R, Shang G. Effect of Gabapentin Enacarbil on Individual Items of the International Restless Legs Study Group Rating Scale and Post-sleep Questionnaire in Adults with Moderate-to-Severe Primary Restless Legs Syndrome: Pooled Analysis of 3 Randomized Trials. Clin Ther. 2016 Jul;38(7):1726-1737.e1. doi: 10.1016/j.clinthera.2016.05.008. Epub 2016 Jun 7.
- Avidan AY, Lee D, Park M, Jaros MJ, Shang G, Kim R. The Effect of Gabapentin Enacarbil on Quality of Life and Mood Outcomes in a Pooled Population of Adult Patients with Moderate-to-Severe Primary Restless Legs Syndrome. CNS Drugs. 2016 Apr;30(4):305-16. doi: 10.1007/s40263-016-0329-4.
- Ondo WG, Hermanowicz N, Borreguero DG, Jaros MJ, Kim R, Shang G. Effect of prior exposure to dopamine agonists on treatment with gabapentin enacarbil in adults with moderate-to-severe primary restless legs syndrome: pooled analyses from 3 randomized trials. J Clin Mov Disord. 2015 Mar 30;2:9. doi: 10.1186/s40734-015-0018-3. eCollection 2015.
- Canafax DM, Bhanegaonkar A, Bharmal M, Calloway M. Validation of the post sleep questionnaire for assessing subjects with restless legs syndrome: results from two double-blind, multicenter, placebo-controlled clinical trials. BMC Neurol. 2011 Apr 28;11:48. doi: 10.1186/1471-2377-11-48.
- Kushida CA, Walters AS, Becker P, Thein SG, Perkins AT, Roth T, Canafax D, Barrett RW; XP021 Study Group. A randomized, double-blind, placebo-controlled, crossover study of XP13512/GSK1838262 in the treatment of patients with primary restless legs syndrome. Sleep. 2009 Feb;32(2):159-68. doi: 10.1093/sleep/32.2.159.
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
March 1, 2006
Primary Completion (Actual)
February 1, 2007
Study Completion (Actual)
February 1, 2007
Study Registration Dates
First Submitted
February 28, 2006
First Submitted That Met QC Criteria
February 28, 2006
First Posted (Estimate)
March 2, 2006
Study Record Updates
Last Update Posted (Estimate)
May 14, 2013
Last Update Submitted That Met QC Criteria
May 10, 2013
Last Verified
May 1, 2011
More Information
Terms related to this study
Additional Relevant MeSH Terms
Other Study ID Numbers
- 110963
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.
Clinical Trials on Restless Legs Syndrome
-
Walter Reed National Military Medical CenterWithdrawnEkbom Syndrome | Restless Legs Syndrome, | Restless Legs,United States
-
XenoPort, Inc.CompletedRestless Legs Syndrome (RLS)United States
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GlaxoSmithKlineCompletedRestless Legs Syndrome | Restless Legs Syndrome (RLS)United States
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Otsuka Pharmaceutical Co., Ltd.CompletedIdiopathic Restless Legs Syndrome
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American Regent, Inc.CompletedRestless Legs Syndrome (RLS)United States
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Astellas Pharma IncCompletedRestless Legs Syndrome (RLS)Japan
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Otsuka Pharmaceutical Co., Ltd.CompletedIdiopathic Restless Legs SyndromeJapan
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UCB PharmaCompletedIdiopathic Restless Legs SyndromeGermany
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Pfizer's Upjohn has merged with Mylan to form Viatris...CompletedIdiopathic Restless Legs SyndromeUnited States, Spain, Finland, Italy, Germany, Sweden, Austria, Netherlands, United Kingdom
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American Regent, Inc.CompletedRestless Legs Syndrome (RLS)
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