Post-marketing Study of Gabapentin Enacarbil to Evaluate the Effect in Restless Leg Syndrome (RLS) Patients With Moderate Renal Impairment

November 7, 2024 updated by: Astellas Pharma Inc

Post-marketing Clinical Study of Gabapentin Enacarbil -Non-blinded Study in Restless Legs Syndrome (RLS) Patients With Moderate Renal Impairment-

To evaluate the safety, efficacy and pharmacokinetics of gabapentin enacarbil in moderate to severe primary RLS patients with moderate renal impairment and to confirm dosage and administration in such population.

Study Overview

Status

Status

Indicates the current recruitment status or the expanded access status.
Completed

Conditions

Conditions

The disease, disorder, syndrome, illness, or injury that is being studied. On ClinicalTrials.gov, conditions may also include other health-related issues, such as lifespan, quality of life, and health risks.

Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.

Detailed Description

This study is a multicenter, non-blinded, non-comparative study. Patients who meet the eligible criteria will undergo one week observation period followed by four week treatment period. In treatment period, patients will receive gabapentin enacarbil orally one daily after dinner. After the four-week treatment period with gabapentin enacarbil, a one-week post-observation period will be undertaken.

Study Type

Study Type

Describes the nature of a clinical study. Study types include interventional studies (also called clinical trials), observational studies (including patient registries), and expanded access.
Interventional

Enrollment (Actual)

Enrollment

The number of participants in a clinical study. The "anticipated" enrollment is the target number of participants that the researchers need for the study.
19

Phase

Phase

The stage of a clinical trial studying a drug or biological product, based on definitions developed by the U.S. Food and Drug Administration (FDA). The phase is based on the study's objective, the number of participants, and other characteristics. There are five phases: Early Phase 1 (formerly listed as Phase 0), Phase 1, Phase 2, Phase 3, and Phase 4. Not Applicable is used to describe trials without FDA-defined phases, including trials of devices or behavioral interventions.
  • Phase 4

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • Japan
      • Chubu, Japan
      • Chugoku, Japan
      • Kansai, Japan
      • Kanto, Japan
      • Kyushu, Japan

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

Eligibility Criteria

The key requirements that people who want to participate in a clinical study must meet or the characteristics they must have. Eligibility criteria consist of both inclusion criteria (which are required for a person to participate in the study) and exclusion criteria (which prevent a person from participating). Types of eligibility criteria include whether a study accepts healthy volunteers, has age or age group requirements, or is limited by sex.

Ages Eligible for Study

20 years to 80 years (Adult, Older Adult)

Accepts Healthy Volunteers

No

Description

Inclusion Criteria:

  • Patients who have been diagnosed with restless legs syndrome (RLS) according to the international RLS Study Group Diagnostic Criteria
  • Patients whose score is 15 or greater on the International RLS (IRLS) Rating Scale on the first day of the pre-observation period.
  • Patients whose creatinine clearance level at the first day of pre-observation period is ≥30 mL/min to <60mL/min estimated by Cockcroft-Gaul t equation
  • Patients who provide written consent

Exclusion Criteria:

  • Patients with sleep disorder such as sleep apnea syndrome, which affects the RLS evaluation
  • Patients with history of augmentation and treatment rebound of RLS symptoms when using dopamine agonis
  • Patients with neuropathy and movement disorder (diabetic neuropathy, Parkinson's disease, multiple sclerosis, dyskinesia, rheumatoid arthritis etc)
  • Patients with uncontrolled diabetes [HbA1c>7.5% (NGSP value), in the past six months], iron deficiency anemia, or drug administration of hypnotic sedatives.
  • Patients who attempted suicide within six months prior to the consent obtained, or who have been diagnosed as a suicide risk by investigator or sub-investigator
  • Patients with moderate or severe depression
  • Patients with alcohol dependence or drug intoxication or who have a history of abuse or drug dependence in the past one year
  • Patients whose job is shift work, professional driver, or engaging in hazardous activities such as operating machinery
  • Patients with history of hypersensitivity to gabapentin
  • Patients who have experience to participate in other post-marketing clinical studies or clinical trials within 12 weeks prior to the start of pre-observation
  • Others: patients who are concluded to be ineligible by an investigator or sub-investigator as ineligible

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: N/A
  • Interventional Model: Single Group Assignment
  • Masking: None (Open Label)

Arms and Interventions

Participant Group / Arm

Participant Group / Arm

A group or subgroup of participants in a clinical trial that receives a specific intervention/treatment, or no intervention, according to the trial's protocol.
Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.
Experimental: Treatment group
Oral
Drug: Gabapentin enacarbil
Oral

What is the study measuring?

Primary Outcome Measures

Primary Outcome Measures

In a clinical study's protocol, the planned outcome measure that is the most important for evaluating the effect of an intervention/treatment. Most clinical studies have one primary outcome measure, but some have more than one.
Outcome Measure
Time Frame
Change in International Restless Leg Syndrome (IRLS) rating scale score
Time Frame: Baseline and at 4 week of the treatment (or at discontinuation)
Baseline and at 4 week of the treatment (or at discontinuation)

Secondary Outcome Measures

Secondary Outcome Measures

In a clinical study's protocol, a planned outcome measure that is not as important as the primary outcome measure for evaluating the effect of an intervention but is still of interest. Most clinical studies have more than one secondary outcome measure.
Outcome Measure
Measure Description
Time Frame
Change in Investigator-rated clinical global impression (ICGI) score
Time Frame: Baseline and at 4 week of the treatment (or at discontinuation)
Baseline and at 4 week of the treatment (or at discontinuation)
Change in Patient-related clinical global impression (PCGI) score
Time Frame: Baseline and at 4 week of the treatment (or at discontinuation)
Baseline and at 4 week of the treatment (or at discontinuation)
Baseline and at 4 week of the treatment (or at discontinuation)
Safety assessed by the incidence of adverse events, vital signs, labo-tests, body weight and Epworth sleepiness scale
Time Frame: Up to 5 weeks
Up to 5 weeks
Plasma gabapentin concentration
Time Frame: Up to 5 weeks
Up to 5 weeks

Collaborators and Investigators

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

Sponsor

Sponsor

The organization or person who initiates the study and who has authority and control over the study.
Astellas Pharma Inc

Investigators

Investigators

A researcher involved in a clinical study. Related terms include site principal investigator, site sub-investigator, study chair, study director, and study principal investigator.
  • Principal Investigator: Medical Director, Astellas Pharma Inc

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.

Helpful Links

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 (Actual)

Study Start

The actual date on which the first participant was enrolled in a clinical study. The "anticipated" study start date is the date that the researchers think will be the study start date.
November 5, 2013

Primary Completion (Actual)

Primary Completion

The date on which the last participant in a clinical study was examined or received an intervention to collect final data for the primary outcome measure. Whether the clinical study ended according to the protocol or was terminated does not affect this date. For clinical studies with more than one primary outcome measure with different completion dates, this term refers to the date on which data collection is completed for all the primary outcome measures. The "anticipated" primary completion date is the date that the researchers think will be the primary completion date for the study.
May 13, 2015

Study Completion (Actual)

Study Completion

The date on which the last participant in a clinical study was examined or received an intervention/treatment to collect final data for the primary outcome measures, secondary outcome measures, and adverse events (that is, the last participant's last visit). The "anticipated" study completion date is the date that the researchers think will be the study completion date.
May 13, 2015

Study Registration Dates

First Submitted

First Submitted

The date on which the study sponsor or investigator first submitted a study record to ClinicalTrials.gov. There is typically a delay of a few days between the first submitted date and the record's availability on ClinicalTrials.gov (the first posted date).
November 6, 2013

First Submitted That Met QC Criteria

First Submitted That Met QC Criteria

The date on which the study sponsor or investigator first submits a study record that is consistent with National Library of Medicine (NLM) quality control (QC) review criteria. The sponsor or investigator may need to revise and submit a study record one or more times before NLM's QC review criteria are met. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
November 6, 2013

First Posted (Estimated)

First Posted

The date on which the study record was first available on ClinicalTrials.gov after National Library of Medicine (NLM) quality control (QC) review has concluded. There is typically a delay of a few days between the date the study sponsor or investigator submitted the study record and the first posted date.
November 13, 2013

Study Record Updates

Last Update Posted (Actual)

Last Update Posted

The most recent date on which changes to a study record were made available on ClinicalTrials.gov. There may be a delay between when the changes were submitted to ClinicalTrials.gov by the study's sponsor or investigator (the last update submitted date) and the last update posted date.
November 8, 2024

Last Update Submitted That Met QC Criteria

Last Update Submitted That Met QC Criteria

The most recent date on which the study sponsor or investigator submitted changes to a study record that are consistent with National Library of Medicine (NLM) quality control (QC) review criteria. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
November 7, 2024

Last Verified

Last Verified

The most recent date on which the study sponsor or investigator confirmed the information about a clinical study on ClinicalTrials.gov as accurate and current. If a study with a recruitment status of recruiting; not yet recruiting; or active, not recruiting has not been confirmed within the past 2 years, the study's recruitment status is shown as unknown.
November 1, 2024

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

Other Study ID Numbers

Identifiers or ID numbers other than the NCT number that are assigned to a clinical study by the study's sponsor, funders, or others. These numbers may include unique identifiers from other trial registries and National Institutes of Health grant numbers.
  • 8825-CL-0103

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

NO

IPD Plan Description

Access to anonymized individual participant level data will not be provided for this trial. Further details on Astellas' data sharing policy can be found at https://www.clinicaltrials.astellas.com/transparency/.

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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