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Registration of the medicine is no longer being pursued in South Korea, Taiwan or Vietnam
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The immediate release (IR) formulation of retigabine has been shown to be superior to placebo as adjunctive therapy in 3 adequate and well-controlled studies in subjects with drug-resistant partial-onset seizures (POS) who had previously failed to respond to two or more antiepileptic drugs (AEDs) and were still having seizures despite current treatment with 1, 2, or 3 AEDs. However, of 1244 subjects randomly assigned to treatment in these 3 clinical studies, only 10 were Asian subjects and only 5 of these Asian subjects were randomly assigned to treatment with retigabine. Therefore, this Phase III study is being conducted to evaluate the efficacy, safety and tolerability, and health outcomes of retigabine, at doses of 900 mg/day and 600 mg/day, compared with placebo in adult Asian subjects with drug-resistant POS.
This is a Phase III study evaluating the efficacy, safety and tolerability, and health outcomes of 2 doses of retigabine immediate release (IR) (GW582892) compared with placebo in adult Asian subjects with drug-resistant partial-onset seizures (POS) who are already taking 1, 2, or 3 antiepileptic drugs (AEDs). This randomised, double-blind, placebo-controlled, parallel-group study will compare retigabine IR at doses of 900 mg/day and 600 mg/day taken in equally divided doses three times a day with placebo.
The study design includes an 8-week Screening/Baseline Phase, a 16-week Treatment Phase (4-week Titration Phase and 12-week Maintenance Phase), and a 4-week Transition or Taper/Follow-up Phase. Approximately 500 subjects will be screened and enrolled with approximately 354 subjects randomly assigned to 1 of 3 treatment groups in a ratio of 1:1:1 (retigabine 900 mg/day, retigabine 600 mg/day, or placebo). The total duration of the study for each subject will be approximately 28 weeks. At the end of the Maintenance Phase, eligible subjects will be given the opportunity to enrol in an open-label extension study.
The primary efficacy endpoint is the proportion of responders, defined as subjects with >/=50% reduction in 28 day total POS frequency, from the Baseline Phase to the Maintenance Phase, in subjects randomly assigned to retigabine 900 mg/day compared with placebo. The key secondary efficacy endpoint is the proportion of responders, defined as subjects with >/=50% reduction in 28 day total POS frequency, from the Baseline Phase to the Maintenance Phase, in subjects randomly assigned to retigabine 600 mg/day compared with placebo.
The safety and tolerability endpoints are incidence and severity of adverse events (AEs); proportion of subjects with AEs leading to discontinuation; change from Baseline in vital sign measurements and weight; change from Baseline in electrocardiogram parameters; change from Baseline in haematology, chemistry, and urinalysis parameters; changes from Baseline in American Urological Association Symptom Index and post-void residual bladder ultrasound volumes; and summary of the Columbia-Suicide Severity Rating Scale.
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| Retigabine 900mg | Experimental | 900mg total daily dose |
|
| Retigabine 600mg | Experimental | 600mg total daily dose |
|
| Placebo | Placebo Comparator | Placebo |
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| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| Retigabine 900mg/day | Drug | Study drug will be administered three times a day in a double blind manner. The starting dose of retigabine will be 300 mg/day. This dose will be increased by 150 mg/day per week to reach the target dose of 900mg/day over a 4 week Titration Phase). The subject will then continue to receive 900mg/day for the next 12 weeks (Maintenance Phase). Eligible subjects will then be offered an opportunity to enter an open label extension (OLE) study. After a 4 week transition phase, eligible subjects will start the OLE on retigabine 900mg/day. |
| Measure | Description | Time Frame |
|---|---|---|
| Number of Placebo and Retigabine 900 mg Responders During the Maintenance Phase (MP) | A responder is defined as a par. with >=50% reduction in the 28 day total partial on-set seizure (POS) frequency from the Baseline Phase (BP) to the MP, randomly assigned to retigabine 900 mg/day compared with placebo. The total 28-day POS rate was defined as: (total number of POS over the evaluable period (MP) / number of days of seizure (sz) data in the evaluable period) *28 days. In the event of one or more innumerable seizures (IS) occurring on a day, these were to be counted as an additional 10 seizures for that day, regardless of the number of occurrences of IS on that day. The number of applicable days in a phase for seizure data is calculated as: the end date of MP minus start date of the MP minus days on which seizures were recorded as "Not done" + 1). Each occurrence of status epilepticus (SE) was counted as 1 seizure (whether partial or not). | Baseline (BL); Week 4 up to Week 16 |
| Measure | Description | Time Frame |
|---|---|---|
| Number of Placebo and Retigabine 600 mg Responders During the MP | A "responder" is defined as a participant experiencing a >=50% reduction in the 28-day total POS frequency from the BP to the MP, randomly assigned to retigabine 600 mg/day compared to placebo. The 28-day total POS frequency was calculated as: (total number of PS over the time period of interest [MP] / number of applicable days in that period) * 28. In a case of one or more occurrences of IS on a day, these seizures were to be counted as an additional 10 seizures for that day, regardless of whether the IS were PS or not, and regardless of the number of occurrences of IS on that day. The number of applicable days in a phase for seizure data is calculated as: the end date of the MP minus the start date of the MP minus days on which seizures were recorded as "Not Done" during the MP plus 1). Each occurrence of SE was counted as 1 seizure (whether partial status or not). |
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Inclusion Criteria:
Subjects eligible for enrolment in the study must meet all of the following criteria:
Exclusion Criteria:
Subjects meeting any of the following criteria must not be enrolled in the study:
Randomisation Criteria:
Subjects must also meet the following criteria at the end of the Baseline Phase (Visit 3) and before randomisation and administration of the first dose of study medication:
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| Name | Affiliation | Role |
|---|---|---|
| GSK Clinical Trials | GlaxoSmithKline | Study Director |
| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| GSK Investigational Site | Hang Hau | Hong Kong | ||||
| GSK Investigational Site |
| PubMed Identifier | Type | Citation | Retractions |
|---|---|---|---|
| 6790275 | Background | Proposal for revised clinical and electroencephalographic classification of epileptic seizures. From the Commission on Classification and Terminology of the International League Against Epilepsy. Epilepsia. 1981 Aug;22(4):489-501. doi: 10.1111/j.1528-1157.1981.tb06159.x. No abstract available. |
| Label | URL |
|---|---|
| Researchers can use this site to request access to anonymised patient level data and/or supporting documents from clinical studies to conduct further research. | View source |
| ID | Type | URL | Comment |
|---|---|---|---|
| 114855 | Clinical Study Report | View IPD |
Patient-level data for this study will be made available through www.clinicalstudydatarequest.com following the timelines and process described on this site.
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76 participants (par.) were randomized to study treatment; 75 par. comprised the Intent-to-Treat Population (par. who were randomly assigned to treatment, received >=1 dose/any portion of a dose of study medication, had Baseline [BL] seizure data, and had >=1 post-BL seizure record between the Titration Phase and the end of the Maintenance Phase).
Participants with drug-resistant partial-onset seizures (POS) who were taking 1, 2, or 3 antiepileptic drugs (AEDs) with or without vagus nerve stimulator (VNS); had a 28-day total POS frequency rate >=4 seizures; and did not have a period of >=21 consecutive days without a POS over the 8-week Baseline Phase were enrolled in this study.
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| ID | Title | Description |
|---|---|---|
| FG000 | Placebo | Participants entered a 16-week Treatment Phase (TrP) consisting of a 4-week Titration Phase (TiP) and a 12-week Maintenance Phase (MP). In the TiP, participants received matching placebo in increasing doses. Participants that could not tolerate the titration or withdrew were discontinued from the study and entered the Taper/Follow-up Phase (TaP/FUP). Participants who tolerated titration entered the MP and continued to receive the same dose regimen for 12 weeks. After completing the MP, participants who opted to enroll in the open-label extension (OLE) study entered the 4-week Transition Phase (TnP). In the TnP, participants received active retigabine in increasing doses starting at 300 milligrams per day (mg/day), 450 mg/day, 600 mg/day, and 750 mg/day, respectively, in each of 4 weeks. Participants that did not enroll in the OLE study completed a 3-week TaP and 1 week of FUP. |
| Title | Milestones | Reasons Not Completed | |||||
|---|---|---|---|---|---|---|---|
| Titration Phase (4 Weeks) |
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| Retigabine 600mg/day | Drug | Study drug will be administered three times a day in a double blind manner. The starting dose of retigabine will be 300mg/day. This dose will be increased by 150 mg/day per week to reach the target dose of 600mg/day over 2 weeks. The subject will then continue to receive 600mg/day for the next 14 weeks (2 weeks of the Titration Phase and 12 weeks of the Maintenance Phase). Eligible subjects will then be offered an opportunity to enter an open label extension (OLE) study. After a 4 week Transition Phase (3 weeks on retigabine 600mg/day, 1 week on retigabine 750mg/day) eligible subjects will start the OLE on retigabine 900mg/day. |
|
| Placebo | Other | Study drug will be administered three times a day in a double blind manner. Subjects randomised to placebo will receive the same number, size and colour of tablets as the 600mg/day and 900mg/day treatment arms for the duration of the 4 week Titration Phase and the 12 week Maintenance Phase. Eligible subjects will then be offered an opportunity to enter an open label extension (OLE) study. The starting dose of retigabine will be 300 mg/day. This dose will be increased by 150 mg/day per week to reach dose of 750mg/day over the 4 weeks of the Transition Phase. On completion of the Transition Phase eligible subjects will start the OLE on retigabine 900mg/day. |
|
| Baseline; Week 4 up to Week 16 |
| Number of Responders From the BP to the Treatment Phase (TrP) | A "responder" is defined as a participant experiencing a >=50% reduction in the 28-day total POS frequency from the BP to the TrP (TiP plus MP). The 28-day total POS frequency was calculated as: (total number of PS over the time period of interest [TrP] / number of applicable days in that period) * 28. In a case of one or more occurrences of IS on a day, these seizures were to be counted as an additional 10 seizures for that day, regardless of whether the IS were PS or not, and regardless of the number of occurrences of IS on that day. The number of applicable days in a phase for seizure data is calculated as: the end date of the TrP minus the start date of the TrP minus days on which seizures were recorded as "Not Done" during the TrP plus 1). Each occurrence of SE was counted as 1 seizure (whether partial status or not). | From Baseline up to Week 16 |
| Percent Change From Baseline in the 28-day Total POS Frequency During the MP | The 28-day total POS frequency was calculated as: (total number of PS over the time period of interest [MP] / number of applicable days in that period) * 28. In a case of one or more occurrences of IS on a day, these seizures were to be counted as an additional 10 seizures for that day, regardless of whether the IS were PS or not, and regardless of the number of occurrences of IS on that day. The number of applicable days in a phase for seizure data is calculated as: the end date of the MP minus the start date of the MP minus days on which seizures were recorded as "Not Done" during the MP plus 1. Percent change from Baseline was calculated as: ([the 28-day PS rate for the period of interest (MP) minus the Baseline 28-day PS rate] / Baseline 28-day PS rate) * 100. A negative percent change indicates a reduction (improvement) from Baseline; thus, the best possible outcome is -100% (100% reduction). There was no theoretical upper limit for worsening. | Baseline; Week 4 up to Week 16 |
| Percent Change From Baseline in the 28-day Total POS Frequency During the TrP | The 28-day total POS frequency was calculated as: (total number of PS over the time period of interest [TrP; TiP plus MP] / number of applicable days in that period) * 28. In a case of one or more occurrences of IS on a day, these seizures were to be counted as an additional 10 seizures for that day, regardless of whether the IS were PS or not, and regardless of the number of occurrences of IS on that day. The number of applicable days in a phase for seizure data is calculated as: the end date of the TrP minus the start date of the TrP minus days on which seizures were recorded as "Not Done" during the TrP plus 1. Percent change from Baseline was calculated as: ([the 28-day PS rate for the period of interest (TrP) minus the Baseline 28-day PS rate] / Baseline 28-day PS rate) * 100. A negative percent change indicates a reduction (improvement) from Baseline; thus, the best possible outcome is -100% (100% reduction). There was no theoretical upper limit for worsening. | From Baseline up to Week 16 |
| Percent Change From Baseline in the 28-day Total POS Frequency During the MP Categorized as: no Change/Increase, >0% to <50% Decrease, 50% to 75% Decrease, and >75% to 100% Decrease | The 28-day total POS frequency was calculated as: (total number of PS over the time period of interest [MP] / number of applicable days in that period) * 28. In a case of >=1 occurrence of IS on a day, these seizures were to be counted as an additional 10 seizures for that day, regardless of whether the IS were PS or not, and regardless of the number of occurrences of IS on that day. The number of applicable days in a phase for seizure data is calculated as: the end date of the MP minus the start date of the MP minus days on which seizures were recorded as "Not Done" during the MP plus 1. Percent change from Baseline was calculated as: ([the 28-day PS rate for the period of interest (MP) minus the Baseline 28-day PS rate] / Baseline 28-day PS rate) * 100. A negative percent change indicates a reduction (improvement) from Baseline. There was no theoretical upper limit for worsening. Each occurrence of status epilepticus (SE) was counted as 1 seizure (whether partial status or not). | Baseline; Week 4 up to Week 16 |
| Percent Change From Baseline in 28 Day Total POS Frequency During the TrP Categorized as: no Change/Increase, >0% to <50% Decrease, 50% to 75% Decrease, and >75% to 100% Decrease | The 28-day total POS frequency was calculated as: (total number of PS over the time period of interest [TrP; TiP plus MP] / number of applicable days in that period) * 28. In a case of one or more occurrences of IS on a day, these seizures were to be counted as an additional 10 seizures for that day, regardless of whether the IS were PS or not, and regardless of the number of occurrences of IS on that day. The number of applicable days in a phase for seizure data is calculated as: the end date of the TrP minus the start date of the TrP minus days on which seizures were recorded as "Not Done" during the TrP plus 1. Percent change from Baseline was calculated as: ([the 28-day PS rate for the period of interest (TrP) minus the Baseline 28-day PS rate] / Baseline 28-day PS rate) * 100. A negative percent change indicates a reduction (improvement) from Baseline; thus, the best possible outcome is -100% (100% reduction). There was no theoretical upper limit for worsening. | From Baseline up to Week 16 |
| Percent Change From Baseline in the 28-day Total POS Frequency During the MP Categorized as: >25% Increase and 0% to 25% Increase | The 28-day total POS frequency was calculated as: (total number of PS over the time period of interest [MP] / number of applicable days in that period) * 28. In a case of one or more occurrences of IS on a day, these seizures were to be counted as an additional 10 seizures for that day, regardless of whether the IS were PS or not, and regardless of the number of occurrences of IS on that day. The number of applicable days in a phase for seizure data is calculated as: the end date of the MP minus the start date of the MP minus days on which seizures were recorded as "Not Done" during the MP plus 1. Percent change from Baseline was calculated as: ([the 28-day PS rate for the period of interest (MP) minus the Baseline 28-day PS rate] / Baseline 28-day PS rate) * 100. A negative percent change indicates a reduction (improvement) from Baseline; thus, the best possible outcome is -100% (100% reduction). There was no theoretical upper limit for worsening. | Baseline; Week 4 up to Week 16 |
| Percent Change From Baseline in the 28-day Total POS Frequency During the TrP Categorized as: >25% Increase and 0% to 25% Increase | The 28-day total POS frequency was calculated as: (total number of PS over the time period of interest [TrP; TiP plus MP] / number of applicable days in that period) * 28. In a case of one or more occurrences of IS on a day, these seizures were to be counted as an additional 10 seizures for that day, regardless of whether the IS were PS or not, and regardless of the number of occurrences of IS on that day. The number of applicable days in a phase for seizure data is calculated as: the end date of the TrP minus the start date of the TrP minus days on which seizures were recorded as "Not Done" during the TrP plus 1. Percent change from Baseline was calculated as: ([the 28-day PS rate for the period of interest (TrP) minus the Baseline 28-day PS rate] / Baseline 28-day PS rate) * 100. A negative percent change indicates a reduction (improvement) from Baseline; thus, the best possible outcome is -100% (100% reduction). There was no theoretical upper limit for worsening. | From Baseline up to Week 16 |
| Number of Participants Who Were Seizure Free During the MP, ITT Population | A seizure free-day is defined as a day with non-missing seizure data but without any seizures. A participant was considered to be seizure free during the MP if he/she had no record of countable seizures of any type, no IS, and no SE during the MP. Participants who had one or more days on which they recorded seizures as "Not Done" on the seizure calendar were not disqualified from being considered as seizure free for that day. Participants who did not complete the study or experienced any seizures in the MP were not considered to be seizure free. A participant who completed the study AND had no seizures during the maintenance phase were counted to be seizure free. Also, a completer who only had seizures during the TiP is considered seizure free. | Baseline; Week 4 up to Week 16 |
| Number of Participants Who Were Seizure Free During the TrP | A seizure free-day is defined as a day with non-missing seizure data but without any seizures. A participant was considered to be seizure free during the TrP if he/she had no record of countable seizures of any type, no IS, and no SE during the TrP. Participants who had one or more days on which they recorded seizures as "Not Done" on the seizure calendar were not disqualified from being considered as seizure free for that day. A participant was considered to be seizure free if they experienced no seizures in the TiP or MP regardless of how long they were in the study. | From Baseline up to Week 16 |
| Percentage of Seizure-free Days in the MP | The percentage of seizure-free days was calculated as: (total number of days without seizures in the MP / number of applicable days in the MP) * 100. A seizure-free day is defined as a day with non-missing seizure data but without any seizures. A participant was considered to be seizure free during the MP if he/she had no record of countable seizures of any type, no IS, and no SE during the MP. Participants who had one or more days on which they recorded seizures as "Not Done" on the seizure calendar were not disqualified from being considered as seizure free for that day. | From Week 4 up to Week 16 |
| Percentage of Seizure-free Days in the TrP | The percentage of seizure-free days was calculated as: (total number of days without seizures in the TrP (TiP plus MP) / number of applicable days in the TrP) * 100. A seizure-free day is defined as a day with non-missing seizure data but without any seizures. A participant was considered to be seizure free during the TrP if he/she had no record of countable seizures of any type, no IS, and no SE during the TrP. Participants who had one or more days on which they recorded seizures as "Not Done" on the seizure calendar were not disqualified from being considered as seizure free for that day. | From Baseline up to Week 16 |
| Incidence of New Seizure Types During the TrP in Participants Without a History of the Indicated Seizure Types at Baseline | A participant was considered to have new seizure types during the TrP if they experienced a new seizure types (such as SE, myoclonic, absence, secondary generalization) and had no prior history of these seizure types. At Screening, a history of previous seizure types was collected, with "Yes," "No," "IS," "SE," or "Unknown" being recorded for each of the seizures types. The history of seizure types was updated during the 8-week BP as pre-treatment status. New types of seizures during the TrP were recorded as A1=simple PS with motor signs; AX=simple PS without motor signs; B=complex PS; C=PS evolving to secondary generalized seizures; D1=absence of seizures; D2=myoclonic seizures; D3=clonic seizures; D4=tonic seizures; D5=tonic-clonic seizures; D6=atonic seizures; E=unclassified seizures; and SE=status epilepticus. | From Baseline up to Week 16 |
| Hong Kong |
| Hong Kong |
| GSK Investigational Site | Kowloon | Hong Kong |
| GSK Investigational Site | Shatin | Hong Kong |
| GSK Investigational Site | Kuala Lumpur | 59100 | Malaysia |
| GSK Investigational Site | Seberang Jaya | 13700 | Malaysia |
| GSK Investigational Site | Cebu City | 6000 | Philippines |
| GSK Investigational Site | Davao City | 8000 | Philippines |
| GSK Investigational Site | Manila | 1003 | Philippines |
| GSK Investigational Site | Singapore | 119074 | Singapore |
| GSK Investigational Site | Busan | 602-715 | South Korea |
| GSK Investigational Site | Busan | 612-865 | South Korea |
| GSK Investigational Site | Daegu | 700-712 | South Korea |
| GSK Investigational Site | Daegu | 705-718 | South Korea |
| GSK Investigational Site | Daejeon | 301-721 | South Korea |
| GSK Investigational Site | Gyeonggi-do | 442-723 | South Korea |
| GSK Investigational Site | Gyeonggi-do | 463-707 | South Korea |
| GSK Investigational Site | Incheon | 405-760 | South Korea |
| GSK Investigational Site | Seoul | 110-744 | South Korea |
| GSK Investigational Site | Seoul | 120-752 | South Korea |
| GSK Investigational Site | Seoul | 135-710 | South Korea |
| GSK Investigational Site | Seoul | 135-720 | South Korea |
| GSK Investigational Site | Seoul | 136-705 | South Korea |
| GSK Investigational Site | Seoul | 137-701 | South Korea |
| GSK Investigational Site | Seoul | 138-736 | South Korea |
| GSK Investigational Site | Seoul | 143-729 | South Korea |
| GSK Investigational Site | Seoul | 150-713 | South Korea |
| GSK Investigational Site | Changhua | 50006 | Taiwan |
| GSK Investigational Site | Kaohsiumg | 386 | Taiwan |
| GSK Investigational Site | Kaohsiung City | 83301 | Taiwan |
| GSK Investigational Site | New Taipei City | 10016 | Taiwan |
| GSK Investigational Site | Taichung | 40705 | Taiwan |
| GSK Investigational Site | Tainan | 70403 | Taiwan |
| GSK Investigational Site | Tainan | 71004 | Taiwan |
| GSK Investigational Site | Taipei | 11031 | Taiwan |
| GSK Investigational Site | Taipei | 110 | Taiwan |
| GSK Investigational Site | Tau-Yuan | 333 | Taiwan |
| GSK Investigational Site | Bangkok | 10330 | Thailand |
| GSK Investigational Site | Bangkok | 10400 | Thailand |
| GSK Investigational Site | Chiang Mai | 50200 | Thailand |
| GSK Investigational Site | Khon Kaen | 40002 | Thailand |
For additional information about this study please refer to the GSK Clinical Study Register |
| 114855 | Study Protocol | View IPD | For additional information about this study please refer to the GSK Clinical Study Register |
| 114855 | Individual Participant Data Set | View IPD | For additional information about this study please refer to the GSK Clinical Study Register |
| 114855 | Annotated Case Report Form | View IPD | For additional information about this study please refer to the GSK Clinical Study Register |
| 114855 | Statistical Analysis Plan | View IPD | For additional information about this study please refer to the GSK Clinical Study Register |
| 114855 | Dataset Specification | View IPD | For additional information about this study please refer to the GSK Clinical Study Register |
| 114855 | Informed Consent Form | View IPD | For additional information about this study please refer to the GSK Clinical Study Register |
| FG001 | Retigabine 600 mg/Day | Participants entered a 16-week TrP consisting of a 4-week TiP and a 12-week MP. In the TiP, participants received a starting dose of retigabine (RTG) 300 mg/day that increased by 150 mg/day per week until a target dose of 600 mg/day was reached. Participants that could not tolerate the titration or withdrew were discontinued from the study and entered the TaP/FUP. Participants who tolerated titration entered the MP and continued to receive 600 mg/day for 12 weeks. After completing the MP, participants who opted to enroll in the OLE study entered the 4-week TnP. In the TnP, participants received RTG 600 mg/day for 3 weeks and RTG 750 mg/day in the last week. Participants that did not enroll in the OLE study completed a 3-week TaP and 1 week of FUP. |
| FG002 | Retigabine 900 mg/Day | Participants entered a 16-week TrP consisting of a 4-week TiP and a 12-week MP. In the TiP, participants received a starting dose of RTG 300 mg/day that increased by 150 mg/day per week until a target dose of 900 mg/day was reached. Participants that could not tolerate the titration or withdrew were discontinued from the study and entered the TaP/FUP. Participants who tolerated titration entered the MP and continued to receive 900 mg/day for 12 weeks. After completing the MP, participants who opted to enroll in the OLE study entered the 4-week TnP. In the TnP, participants received RTG 900 mg/day for 4 weeks. Participants that did not enroll in the OLE study completed a 3-week TaP and 1 week of FUP. |
| COMPLETED |
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| NOT COMPLETED |
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| Maintenance Phase (12 Weeks) |
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| Transition Phase (4 Weeks) |
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| Taper/Follow-up Phase (4 Weeks) |
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| ID | Title | Description |
|---|---|---|
| BG000 | Retigabine 900 mg/Day | Participants entered a 16-week TrP consisting of a 4-week TiP and a 12-week MP. In the TiP, participants received a starting dose of RTG 300 mg/day that increased by 150 mg/day per week until a target dose of 900 mg/day was reached. Participants that could not tolerate the titration or withdrew were discontinued from the study and entered the TaP/FUP. Participants who tolerated titration entered the MP and continued to receive 900 mg/day for 12 weeks. After completing the MP, participants who opted to enroll in the OLE study entered the 4-week TnP. In the TnP, participants received RTG 900 mg/day for 4 weeks. Participants that did not enroll in the OLE study completed a 3-week TaP and 1 week of FUP. |
| BG001 | Retigabine 600 mg/Day | Participants entered a 16-week TrP consisting of a 4-week TiP and a 12-week MP. In the TiP, participants received a starting dose of retigabine (RTG) 300 mg/day that increased by 150 mg/day per week until a target dose of 600 mg/day was reached. Participants that could not tolerate the titration or withdrew were discontinued from the study and entered the TaP/FUP. Participants who tolerated titration entered the MP and continued to receive 600 mg/day for 12 weeks. After completing the MP, participants who opted to enroll in the OLE study entered the 4-week TnP. In the TnP, participants received RTG 600 mg/day for 3 weeks and RTG 750 mg/day in the last week. Participants that did not enroll in the OLE study completed a 3-week TaP and 1 week of FUP. |
| BG002 | Placebo | Participants entered a 16-week Treatment Phase (TrP) consisting of a 4-week Titration Phase (TiP) and a 12-week Maintenance Phase (MP). In the TiP, participants received matching placebo in increasing doses. Participants that could not tolerate the titration or withdrew were discontinued from the study and entered the Taper/Follow-up Phase (TaP/FUP). Participants who tolerated titration entered the MP and continued to receive the same dose regimen for 12 weeks. After completing the MP, participants who opted to enroll in the open-label extension (OLE) study entered the 4-week Transition Phase (TnP). In the TnP, participants received active retigabine in increasing doses starting at 300 milligrams per day (mg/day), 450 mg/day, 600 mg/day, and 750 mg/day, respectively, in each of 4 weeks. Participants that did not enroll in the OLE study completed a 3-week TaP and 1 week of FUP. |
| BG003 | Total | Total of all reporting groups |
| Units | Counts |
|---|---|
| Participants |
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| Title | Description | Population Description | Parameter Type | Dispersion Type | Unit of Measure | Calculate Percentage | Denominator Units Selected | Denominators | Classes | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Age, Continuous | Baseline data are reported for members of the Safety Population: all randomized participants who received at least one dose of study medication. | Mean | Standard Deviation | Years |
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| Sex: Female, Male | Baseline data are reported for members of the Safety Population: all randomized participants who received at least one dose of study medication. | Count of Participants | Participants |
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| Race/Ethnicity, Customized | Baseline data are reported for members of the Safety Population: all randomized participants who received at least one dose of study medication. | Number | Participants |
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| Type | Title | Description | Population Description | Reporting Status | Anticipated Posting Date | Parameter Type | Dispersion Type | Unit of Measure | Calculate Percentage | Time Frame | Units Analyzed | Denominator Units Selected | Arm/Group Information | Denominators | Classes | Analyses | |||||||||||||||||||||||||||||||||
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| Primary | Number of Placebo and Retigabine 900 mg Responders During the Maintenance Phase (MP) | A responder is defined as a par. with >=50% reduction in the 28 day total partial on-set seizure (POS) frequency from the Baseline Phase (BP) to the MP, randomly assigned to retigabine 900 mg/day compared with placebo. The total 28-day POS rate was defined as: (total number of POS over the evaluable period (MP) / number of days of seizure (sz) data in the evaluable period) *28 days. In the event of one or more innumerable seizures (IS) occurring on a day, these were to be counted as an additional 10 seizures for that day, regardless of the number of occurrences of IS on that day. The number of applicable days in a phase for seizure data is calculated as: the end date of MP minus start date of the MP minus days on which seizures were recorded as "Not done" + 1). Each occurrence of status epilepticus (SE) was counted as 1 seizure (whether partial or not). | ITT Population: all par. who were randomly assigned to treatment; rec'd≥1 dose (or any portion of dose) of study medication; had BL sz data; and had ≥1 post-BL sz record (whether or not they had a sz) between start of TiP and end of MP. Par. who dropped out during TiP were classified as non-responders. For all other par. only MP data were used. | Posted | Number | Participants | Baseline (BL); Week 4 up to Week 16 |
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| Secondary | Number of Placebo and Retigabine 600 mg Responders During the MP | A "responder" is defined as a participant experiencing a >=50% reduction in the 28-day total POS frequency from the BP to the MP, randomly assigned to retigabine 600 mg/day compared to placebo. The 28-day total POS frequency was calculated as: (total number of PS over the time period of interest [MP] / number of applicable days in that period) * 28. In a case of one or more occurrences of IS on a day, these seizures were to be counted as an additional 10 seizures for that day, regardless of whether the IS were PS or not, and regardless of the number of occurrences of IS on that day. The number of applicable days in a phase for seizure data is calculated as: the end date of the MP minus the start date of the MP minus days on which seizures were recorded as "Not Done" during the MP plus 1). Each occurrence of SE was counted as 1 seizure (whether partial status or not). | ITT Population: all par. who were randomly assigned to treatment; rec'd≥1 dose (or any portion of dose) of study medication; had BL sz data; and had ≥1 post-BL sz record (whether or not they had a sz) between start of TiP and end of MP. Par. who dropped out during TiP were classified as non-responders. For all other par. only MP data were used. | Posted | Number | Participants | Baseline; Week 4 up to Week 16 |
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| Secondary | Number of Responders From the BP to the Treatment Phase (TrP) | A "responder" is defined as a participant experiencing a >=50% reduction in the 28-day total POS frequency from the BP to the TrP (TiP plus MP). The 28-day total POS frequency was calculated as: (total number of PS over the time period of interest [TrP] / number of applicable days in that period) * 28. In a case of one or more occurrences of IS on a day, these seizures were to be counted as an additional 10 seizures for that day, regardless of whether the IS were PS or not, and regardless of the number of occurrences of IS on that day. The number of applicable days in a phase for seizure data is calculated as: the end date of the TrP minus the start date of the TrP minus days on which seizures were recorded as "Not Done" during the TrP plus 1). Each occurrence of SE was counted as 1 seizure (whether partial status or not). | Intent-to-Treat (ITT) Population | Posted | Number | Participants | From Baseline up to Week 16 |
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| Secondary | Percent Change From Baseline in the 28-day Total POS Frequency During the MP | The 28-day total POS frequency was calculated as: (total number of PS over the time period of interest [MP] / number of applicable days in that period) * 28. In a case of one or more occurrences of IS on a day, these seizures were to be counted as an additional 10 seizures for that day, regardless of whether the IS were PS or not, and regardless of the number of occurrences of IS on that day. The number of applicable days in a phase for seizure data is calculated as: the end date of the MP minus the start date of the MP minus days on which seizures were recorded as "Not Done" during the MP plus 1. Percent change from Baseline was calculated as: ([the 28-day PS rate for the period of interest (MP) minus the Baseline 28-day PS rate] / Baseline 28-day PS rate) * 100. A negative percent change indicates a reduction (improvement) from Baseline; thus, the best possible outcome is -100% (100% reduction). There was no theoretical upper limit for worsening. | ITT Population. Participants who dropped out during the TiP were calculated based on TiP data. For all others, only MP data were used. | Posted | Median | Full Range | Percent change | Baseline; Week 4 up to Week 16 |
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| Secondary | Percent Change From Baseline in the 28-day Total POS Frequency During the TrP | The 28-day total POS frequency was calculated as: (total number of PS over the time period of interest [TrP; TiP plus MP] / number of applicable days in that period) * 28. In a case of one or more occurrences of IS on a day, these seizures were to be counted as an additional 10 seizures for that day, regardless of whether the IS were PS or not, and regardless of the number of occurrences of IS on that day. The number of applicable days in a phase for seizure data is calculated as: the end date of the TrP minus the start date of the TrP minus days on which seizures were recorded as "Not Done" during the TrP plus 1. Percent change from Baseline was calculated as: ([the 28-day PS rate for the period of interest (TrP) minus the Baseline 28-day PS rate] / Baseline 28-day PS rate) * 100. A negative percent change indicates a reduction (improvement) from Baseline; thus, the best possible outcome is -100% (100% reduction). There was no theoretical upper limit for worsening. | ITT Population. Participants who dropped out during the TiP were calculated based on TiP data. For all others both Titration and Maintenance Phase data were used | Posted | Median | Full Range | Percent change | From Baseline up to Week 16 |
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| Secondary | Percent Change From Baseline in the 28-day Total POS Frequency During the MP Categorized as: no Change/Increase, >0% to <50% Decrease, 50% to 75% Decrease, and >75% to 100% Decrease | The 28-day total POS frequency was calculated as: (total number of PS over the time period of interest [MP] / number of applicable days in that period) * 28. In a case of >=1 occurrence of IS on a day, these seizures were to be counted as an additional 10 seizures for that day, regardless of whether the IS were PS or not, and regardless of the number of occurrences of IS on that day. The number of applicable days in a phase for seizure data is calculated as: the end date of the MP minus the start date of the MP minus days on which seizures were recorded as "Not Done" during the MP plus 1. Percent change from Baseline was calculated as: ([the 28-day PS rate for the period of interest (MP) minus the Baseline 28-day PS rate] / Baseline 28-day PS rate) * 100. A negative percent change indicates a reduction (improvement) from Baseline. There was no theoretical upper limit for worsening. Each occurrence of status epilepticus (SE) was counted as 1 seizure (whether partial status or not). | ITT Population: Due to the early termination of the study, insufficient data are available to perform these analysis. | Posted | Baseline; Week 4 up to Week 16 |
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| Secondary | Percent Change From Baseline in 28 Day Total POS Frequency During the TrP Categorized as: no Change/Increase, >0% to <50% Decrease, 50% to 75% Decrease, and >75% to 100% Decrease | The 28-day total POS frequency was calculated as: (total number of PS over the time period of interest [TrP; TiP plus MP] / number of applicable days in that period) * 28. In a case of one or more occurrences of IS on a day, these seizures were to be counted as an additional 10 seizures for that day, regardless of whether the IS were PS or not, and regardless of the number of occurrences of IS on that day. The number of applicable days in a phase for seizure data is calculated as: the end date of the TrP minus the start date of the TrP minus days on which seizures were recorded as "Not Done" during the TrP plus 1. Percent change from Baseline was calculated as: ([the 28-day PS rate for the period of interest (TrP) minus the Baseline 28-day PS rate] / Baseline 28-day PS rate) * 100. A negative percent change indicates a reduction (improvement) from Baseline; thus, the best possible outcome is -100% (100% reduction). There was no theoretical upper limit for worsening. | ITT Population: Due to the early termination of the study, insufficient data are available to perform these analysis. | Posted | From Baseline up to Week 16 |
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| Secondary | Percent Change From Baseline in the 28-day Total POS Frequency During the MP Categorized as: >25% Increase and 0% to 25% Increase | The 28-day total POS frequency was calculated as: (total number of PS over the time period of interest [MP] / number of applicable days in that period) * 28. In a case of one or more occurrences of IS on a day, these seizures were to be counted as an additional 10 seizures for that day, regardless of whether the IS were PS or not, and regardless of the number of occurrences of IS on that day. The number of applicable days in a phase for seizure data is calculated as: the end date of the MP minus the start date of the MP minus days on which seizures were recorded as "Not Done" during the MP plus 1. Percent change from Baseline was calculated as: ([the 28-day PS rate for the period of interest (MP) minus the Baseline 28-day PS rate] / Baseline 28-day PS rate) * 100. A negative percent change indicates a reduction (improvement) from Baseline; thus, the best possible outcome is -100% (100% reduction). There was no theoretical upper limit for worsening. | ITT Population: Due to the early termination of the study, insufficient data are available to perform these analysis. | Posted | Baseline; Week 4 up to Week 16 |
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| Secondary | Percent Change From Baseline in the 28-day Total POS Frequency During the TrP Categorized as: >25% Increase and 0% to 25% Increase | The 28-day total POS frequency was calculated as: (total number of PS over the time period of interest [TrP; TiP plus MP] / number of applicable days in that period) * 28. In a case of one or more occurrences of IS on a day, these seizures were to be counted as an additional 10 seizures for that day, regardless of whether the IS were PS or not, and regardless of the number of occurrences of IS on that day. The number of applicable days in a phase for seizure data is calculated as: the end date of the TrP minus the start date of the TrP minus days on which seizures were recorded as "Not Done" during the TrP plus 1. Percent change from Baseline was calculated as: ([the 28-day PS rate for the period of interest (TrP) minus the Baseline 28-day PS rate] / Baseline 28-day PS rate) * 100. A negative percent change indicates a reduction (improvement) from Baseline; thus, the best possible outcome is -100% (100% reduction). There was no theoretical upper limit for worsening. | ITT Population: Due to the early termination of the study, insufficient data are available to perform these analysis. | Posted | From Baseline up to Week 16 |
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| Secondary | Number of Participants Who Were Seizure Free During the MP, ITT Population | A seizure free-day is defined as a day with non-missing seizure data but without any seizures. A participant was considered to be seizure free during the MP if he/she had no record of countable seizures of any type, no IS, and no SE during the MP. Participants who had one or more days on which they recorded seizures as "Not Done" on the seizure calendar were not disqualified from being considered as seizure free for that day. Participants who did not complete the study or experienced any seizures in the MP were not considered to be seizure free. A participant who completed the study AND had no seizures during the maintenance phase were counted to be seizure free. Also, a completer who only had seizures during the TiP is considered seizure free. | ITT Population. | Posted | Number | Participants | Baseline; Week 4 up to Week 16 |
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| Secondary | Number of Participants Who Were Seizure Free During the TrP | A seizure free-day is defined as a day with non-missing seizure data but without any seizures. A participant was considered to be seizure free during the TrP if he/she had no record of countable seizures of any type, no IS, and no SE during the TrP. Participants who had one or more days on which they recorded seizures as "Not Done" on the seizure calendar were not disqualified from being considered as seizure free for that day. A participant was considered to be seizure free if they experienced no seizures in the TiP or MP regardless of how long they were in the study. | ITT Population. | Posted | Number | Participants | From Baseline up to Week 16 |
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| Secondary | Percentage of Seizure-free Days in the MP | The percentage of seizure-free days was calculated as: (total number of days without seizures in the MP / number of applicable days in the MP) * 100. A seizure-free day is defined as a day with non-missing seizure data but without any seizures. A participant was considered to be seizure free during the MP if he/she had no record of countable seizures of any type, no IS, and no SE during the MP. Participants who had one or more days on which they recorded seizures as "Not Done" on the seizure calendar were not disqualified from being considered as seizure free for that day. | ITT Population. | Posted | Mean | Standard Deviation | Percentage of seizure-free days | From Week 4 up to Week 16 |
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| Secondary | Percentage of Seizure-free Days in the TrP | The percentage of seizure-free days was calculated as: (total number of days without seizures in the TrP (TiP plus MP) / number of applicable days in the TrP) * 100. A seizure-free day is defined as a day with non-missing seizure data but without any seizures. A participant was considered to be seizure free during the TrP if he/she had no record of countable seizures of any type, no IS, and no SE during the TrP. Participants who had one or more days on which they recorded seizures as "Not Done" on the seizure calendar were not disqualified from being considered as seizure free for that day. | ITT Population. | Posted | Mean | Standard Deviation | Percentage of seizure-free days | From Baseline up to Week 16 |
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| Secondary | Incidence of New Seizure Types During the TrP in Participants Without a History of the Indicated Seizure Types at Baseline | A participant was considered to have new seizure types during the TrP if they experienced a new seizure types (such as SE, myoclonic, absence, secondary generalization) and had no prior history of these seizure types. At Screening, a history of previous seizure types was collected, with "Yes," "No," "IS," "SE," or "Unknown" being recorded for each of the seizures types. The history of seizure types was updated during the 8-week BP as pre-treatment status. New types of seizures during the TrP were recorded as A1=simple PS with motor signs; AX=simple PS without motor signs; B=complex PS; C=PS evolving to secondary generalized seizures; D1=absence of seizures; D2=myoclonic seizures; D3=clonic seizures; D4=tonic seizures; D5=tonic-clonic seizures; D6=atonic seizures; E=unclassified seizures; and SE=status epilepticus. | ITT Population. | Posted | Number | Number of events | From Baseline up to Week 16 |
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Treatment-emergent SAEs and non-serious AEs were collected from start of study treatment until the end of the TnP for participants who entered the OLE study (up to Week 20), or until the follow-up visit for par. who entered the TaP (up to Week 20).
SAEs and non-serious AEs are reported for members of the Safety Population, comprised of all randomized participants who received at least one dose of study medication.
Not provided
| ID | Title | Description | Deaths (Affected) | Deaths (At Risk) | Serious Events (Affected) | Serious Events (At Risk) | Other Events (Affected) | Other Events (At Risk) |
|---|---|---|---|---|---|---|---|---|
| EG000 | Retigabine 900 mg/Day | Participants entered a 16-week TrP consisting of a 4-week TiP and a 12-week MP. In the TiP, participants received a starting dose of RTG 300 mg/day that increased by 150 mg/day per week until a target dose of 900 mg/day was reached. Participants that could not tolerate the titration or withdrew were discontinued from the study and entered the TaP/FUP. Participants who tolerated titration entered the MP and continued to receive 900 mg/day for 12 weeks. After completing the MP, participants who opted to enroll in the OLE study entered the 4-week TnP. In the TnP, participants received RTG 900 mg/day for 4 weeks. Participants that did not enroll in the OLE study completed a 3-week TaP and 1 week of FUP. | 2 | 24 | 20 | 24 | ||
| EG001 | Retigabine 600 mg/Day | Participants entered a 16-week TrP consisting of a 4-week TiP and a 12-week MP. In the TiP, participants received a starting dose of retigabine (RTG) 300 mg/day that increased by 150 mg/day per week until a target dose of 600 mg/day was reached. Participants that could not tolerate the titration or withdrew were discontinued from the study and entered the TaP/FUP. Participants who tolerated titration entered the MP and continued to receive 600 mg/day for 12 weeks. After completing the MP, participants who opted to enroll in the OLE study entered the 4-week TnP. In the TnP, participants received RTG 600 mg/day for 3 weeks and RTG 750 mg/day in the last week. Participants that did not enroll in the OLE study completed a 3-week TaP and 1 week of FUP. | 1 | 26 | 24 | 26 | ||
| EG002 | Placebo | Participants entered a 16-week Treatment Phase (TrP) consisting of a 4-week Titration Phase (TiP) and a 12-week Maintenance Phase (MP). In the TiP, participants received matching placebo in increasing doses. Participants that could not tolerate the titration or withdrew were discontinued from the study and entered the Taper/Follow-up Phase (TaP/FUP). Participants who tolerated titration entered the MP and continued to receive the same dose regimen for 12 weeks. After completing the MP, participants who opted to enroll in the open-label extension (OLE) study entered the 4-week Transition Phase (TnP). In the TnP, participants received active retigabine in increasing doses starting at 300 milligrams per day (mg/day), 450 mg/day, 600 mg/day, and 750 mg/day, respectively, in each of 4 weeks. Participants that did not enroll in the OLE study completed a 3-week TaP and 1 week of FUP. | 1 | 25 | 18 | 25 |
| Term | Organ System | Source Vocabulary | Assessment Type | Notes | Statistical Information |
|---|---|---|---|---|---|
| Dizziness | Nervous system disorders | MedDRA | Systematic Assessment |
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| Grand mal convulsion | Nervous system disorders | MedDRA | Systematic Assessment |
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| Pneumonia | Infections and infestations | MedDRA | Systematic Assessment |
| |
| Procedural vomiting | Injury, poisoning and procedural complications | MedDRA | Systematic Assessment |
| |
| Nephrolithiasis | Renal and urinary disorders | MedDRA | Systematic Assessment |
|
| Term | Organ System | Source Vocabulary | Assessment Type | Notes | Statistical Information |
|---|---|---|---|---|---|
| Dizziness | Nervous system disorders | MedDRA | Systematic Assessment |
| |
| Somnolence | Nervous system disorders | MedDRA | Systematic Assessment |
| |
| Tremor | Nervous system disorders | MedDRA | Systematic Assessment |
| |
| Memory impairment | Nervous system disorders | MedDRA | Systematic Assessment |
| |
| Ataxia | Nervous system disorders | MedDRA | Systematic Assessment |
| |
| Headache | Nervous system disorders | MedDRA | Systematic Assessment |
| |
| Hypoaesthesia | Nervous system disorders | MedDRA | Systematic Assessment |
| |
| Dyspepsia | Gastrointestinal disorders | MedDRA | Systematic Assessment |
| |
| Diarrhoea | Gastrointestinal disorders | MedDRA | Systematic Assessment |
| |
| Skin laceration | Injury, poisoning and procedural complications | MedDRA | Systematic Assessment |
| |
| Bradyphrenia | Psychiatric disorders | MedDRA | Systematic Assessment |
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| Confusional state | Psychiatric disorders | MedDRA | Systematic Assessment |
| |
| Upper respiratory tract infection | Infections and infestations | MedDRA | Systematic Assessment |
| |
| Dysuria | Renal and urinary disorders | MedDRA | Systematic Assessment |
| |
| Asthenia | General disorders | MedDRA | Systematic Assessment |
| |
| Muscular weakness | Musculoskeletal and connective tissue disorders | MedDRA | Systematic Assessment |
| |
| Vision blurred | Eye disorders | MedDRA | Systematic Assessment |
| |
| Weight increased | Investigations | MedDRA | Systematic Assessment |
|
RTG114855 was designed for registration of retigabine as add-on treatment of drug-resistant POS in South Korea/Taiwan/ Vietnam. GSK decided not to pursue registration in these countries and terminated the study early based on new safety information.
GSK agreements may vary with individual investigators, but will not prohibit any investigator from publishing. GSK supports the publication of results from all centers of a multi-center trial but requests that reports based on single-site data not precede the primary publication of the entire clinical trial.
| Title | Organization | Phone | Extension | |
|---|---|---|---|---|
| GSK Response Center | GlaxoSmithKline | 866-435-7343 |
| ID | Term |
|---|---|
| D004827 | Epilepsy |
| ID | Term |
|---|---|
| D001927 | Brain Diseases |
| D002493 | Central Nervous System Diseases |
| D009422 | Nervous System Diseases |
Not provided
Not provided
| ID | Term |
|---|---|
| C101866 | ezogabine |
Not provided
Not provided
Not provided
| Adverse Event |
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| Withdrawal by Subject |
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| Study Terminated |
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| Male |
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| Asian - South East Asian Heritage |
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| OG001 | Retigabine 600 mg/Day | Participants entered a 16-week TrP consisting of a 4-week TiP and a 12-week MP. In the TiP, participants received a starting dose of retigabine (RTG) 300 mg/day that increased by 150 mg/day per week until a target dose of 600 mg/day was reached. Participants that could not tolerate the titration or withdrew were discontinued from the study and entered the TaP/FUP. Participants who tolerated titration entered the MP and continued to receive 600 mg/day for 12 weeks. After completing the MP, participants who opted to enroll in the OLE study entered the 4-week TnP. In the TnP, participants received RTG 600 mg/day for 3 weeks and RTG 750 mg/day in the last week. Participants that did not enroll in the OLE study completed a 3-week TaP and 1 week of FUP. |
| OG002 | Retigabine 900 mg/Day | Participants entered a 16-week TrP consisting of a 4-week TiP and a 12-week MP. In the TiP, participants received a starting dose of RTG 300 mg/day that increased by 150 mg/day per week until a target dose of 900 mg/day was reached. Participants that could not tolerate the titration or withdrew were discontinued from the study and entered the TaP/FUP. Participants who tolerated titration entered the MP and continued to receive 900 mg/day for 12 weeks. After completing the MP, participants who opted to enroll in the OLE study entered the 4-week TnP. In the TnP, participants received RTG 900 mg/day for 4 weeks. Participants that did not enroll in the OLE study completed a 3-week TaP and 1 week of FUP. |
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| OG001 | Retigabine 600 mg/Day | Participants entered a 16-week TrP consisting of a 4-week TiP and a 12-week MP. In the TiP, participants received a starting dose of retigabine (RTG) 300 mg/day that increased by 150 mg/day per week until a target dose of 600 mg/day was reached. Participants that could not tolerate the titration or withdrew were discontinued from the study and entered the TaP/FUP. Participants who tolerated titration entered the MP and continued to receive 600 mg/day for 12 weeks. After completing the MP, participants who opted to enroll in the OLE study entered the 4-week TnP. In the TnP, participants received RTG 600 mg/day for 3 weeks and RTG 750 mg/day in the last week. Participants that did not enroll in the OLE study completed a 3-week TaP and 1 week of FUP. |
| OG002 | Retigabine 900 mg/Day | Participants entered a 16-week TrP consisting of a 4-week TiP and a 12-week MP. In the TiP, participants received a starting dose of RTG 300 mg/day that increased by 150 mg/day per week until a target dose of 900 mg/day was reached. Participants that could not tolerate the titration or withdrew were discontinued from the study and entered the TaP/FUP. Participants who tolerated titration entered the MP and continued to receive 900 mg/day for 12 weeks. After completing the MP, participants who opted to enroll in the OLE study entered the 4-week TnP. In the TnP, participants received RTG 900 mg/day for 4 weeks. Participants that did not enroll in the OLE study completed a 3-week TaP and 1 week of FUP. |
|
|
| OG001 | Retigabine 600 mg/Day | Participants entered a 16-week TrP consisting of a 4-week TiP and a 12-week MP. In the TiP, participants received a starting dose of retigabine (RTG) 300 mg/day that increased by 150 mg/day per week until a target dose of 600 mg/day was reached. Participants that could not tolerate the titration or withdrew were discontinued from the study and entered the TaP/FUP. Participants who tolerated titration entered the MP and continued to receive 600 mg/day for 12 weeks. After completing the MP, participants who opted to enroll in the OLE study entered the 4-week TnP. In the TnP, participants received RTG 600 mg/day for 3 weeks and RTG 750 mg/day in the last week. Participants that did not enroll in the OLE study completed a 3-week TaP and 1 week of FUP. |
| OG002 | Retigabine 900 mg/Day | Participants entered a 16-week TrP consisting of a 4-week TiP and a 12-week MP. In the TiP, participants received a starting dose of RTG 300 mg/day that increased by 150 mg/day per week until a target dose of 900 mg/day was reached. Participants that could not tolerate the titration or withdrew were discontinued from the study and entered the TaP/FUP. Participants who tolerated titration entered the MP and continued to receive 900 mg/day for 12 weeks. After completing the MP, participants who opted to enroll in the OLE study entered the 4-week TnP. In the TnP, participants received RTG 900 mg/day for 4 weeks. Participants that did not enroll in the OLE study completed a 3-week TaP and 1 week of FUP. |
|
|
| OG001 | Retigabine 600 mg/Day | Participants entered a 16-week TrP consisting of a 4-week TiP and a 12-week MP. In the TiP, participants received a starting dose of retigabine (RTG) 300 mg/day that increased by 150 mg/day per week until a target dose of 600 mg/day was reached. Participants that could not tolerate the titration or withdrew were discontinued from the study and entered the TaP/FUP. Participants who tolerated titration entered the MP and continued to receive 600 mg/day for 12 weeks. After completing the MP, participants who opted to enroll in the OLE study entered the 4-week TnP. In the TnP, participants received RTG 600 mg/day for 3 weeks and RTG 750 mg/day in the last week. Participants that did not enroll in the OLE study completed a 3-week TaP and 1 week of FUP. |
| OG002 | Retigabine 900 mg/Day | Participants entered a 16-week TrP consisting of a 4-week TiP and a 12-week MP. In the TiP, participants received a starting dose of RTG 300 mg/day that increased by 150 mg/day per week until a target dose of 900 mg/day was reached. Participants that could not tolerate the titration or withdrew were discontinued from the study and entered the TaP/FUP. Participants who tolerated titration entered the MP and continued to receive 900 mg/day for 12 weeks. After completing the MP, participants who opted to enroll in the OLE study entered the 4-week TnP. In the TnP, participants received RTG 900 mg/day for 4 weeks. Participants that did not enroll in the OLE study completed a 3-week TaP and 1 week of FUP. |
|
|
| OG001 | Retigabine 600 mg/Day | Participants entered a 16-week TrP consisting of a 4-week TiP and a 12-week MP. In the TiP, participants received a starting dose of retigabine (RTG) 300 mg/day that increased by 150 mg/day per week until a target dose of 600 mg/day was reached. Participants that could not tolerate the titration or withdrew were discontinued from the study and entered the TaP/FUP. Participants who tolerated titration entered the MP and continued to receive 600 mg/day for 12 weeks. After completing the MP, participants who opted to enroll in the OLE study entered the 4-week TnP. In the TnP, participants received RTG 600 mg/day for 3 weeks and RTG 750 mg/day in the last week. Participants that did not enroll in the OLE study completed a 3-week TaP and 1 week of FUP. |
| OG002 | Retigabine 900 mg/Day | Participants entered a 16-week TrP consisting of a 4-week TiP and a 12-week MP. In the TiP, participants received a starting dose of RTG 300 mg/day that increased by 150 mg/day per week until a target dose of 900 mg/day was reached. Participants that could not tolerate the titration or withdrew were discontinued from the study and entered the TaP/FUP. Participants who tolerated titration entered the MP and continued to receive 900 mg/day for 12 weeks. After completing the MP, participants who opted to enroll in the OLE study entered the 4-week TnP. In the TnP, participants received RTG 900 mg/day for 4 weeks. Participants that did not enroll in the OLE study completed a 3-week TaP and 1 week of FUP. |
|
| OG001 | Retigabine 600 mg/Day | Participants entered a 16-week TrP consisting of a 4-week TiP and a 12-week MP. In the TiP, participants received a starting dose of retigabine (RTG) 300 mg/day that increased by 150 mg/day per week until a target dose of 600 mg/day was reached. Participants that could not tolerate the titration or withdrew were discontinued from the study and entered the TaP/FUP. Participants who tolerated titration entered the MP and continued to receive 600 mg/day for 12 weeks. After completing the MP, participants who opted to enroll in the OLE study entered the 4-week TnP. In the TnP, participants received RTG 600 mg/day for 3 weeks and RTG 750 mg/day in the last week. Participants that did not enroll in the OLE study completed a 3-week TaP and 1 week of FUP. |
| OG002 | Retigabine 900 mg/Day | Participants entered a 16-week TrP consisting of a 4-week TiP and a 12-week MP. In the TiP, participants received a starting dose of RTG 300 mg/day that increased by 150 mg/day per week until a target dose of 900 mg/day was reached. Participants that could not tolerate the titration or withdrew were discontinued from the study and entered the TaP/FUP. Participants who tolerated titration entered the MP and continued to receive 900 mg/day for 12 weeks. After completing the MP, participants who opted to enroll in the OLE study entered the 4-week TnP. In the TnP, participants received RTG 900 mg/day for 4 weeks. Participants that did not enroll in the OLE study completed a 3-week TaP and 1 week of FUP. |
|
| OG002 | Retigabine 600 mg/Day | Participants entered a 16-week TrP consisting of a 4-week TiP and a 12-week MP. In the TiP, participants received a starting dose of retigabine (RTG) 300 mg/day that increased by 150 mg/day per week until a target dose of 600 mg/day was reached. Participants that could not tolerate the titration or withdrew were discontinued from the study and entered the TaP/FUP. Participants who tolerated titration entered the MP and continued to receive 600 mg/day for 12 weeks. After completing the MP, participants who opted to enroll in the OLE study entered the 4-week TnP. In the TnP, participants received RTG 600 mg/day for 3 weeks and RTG 750 mg/day in the last week. Participants that did not enroll in the OLE study completed a 3-week TaP and 1 week of FUP. |
| OG003 | Retigabine 900 mg/Day | Participants entered a 16-week TrP consisting of a 4-week TiP and a 12-week MP. In the TiP, participants received a starting dose of RTG 300 mg/day that increased by 150 mg/day per week until a target dose of 900 mg/day was reached. Participants that could not tolerate the titration or withdrew were discontinued from the study and entered the TaP/FUP. Participants who tolerated titration entered the MP and continued to receive 900 mg/day for 12 weeks. After completing the MP, participants who opted to enroll in the OLE study entered the 4-week TnP. In the TnP, participants received RTG 900 mg/day for 4 weeks. Participants that did not enroll in the OLE study completed a 3-week TaP and 1 week of FUP. |
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| OG001 | Retigabine 600 mg/Day | Participants entered a 16-week TrP consisting of a 4-week TiP and a 12-week MP. In the TiP, participants received a starting dose of retigabine (RTG) 300 mg/day that increased by 150 mg/day per week until a target dose of 600 mg/day was reached. Participants that could not tolerate the titration or withdrew were discontinued from the study and entered the TaP/FUP. Participants who tolerated titration entered the MP and continued to receive 600 mg/day for 12 weeks. After completing the MP, participants who opted to enroll in the OLE study entered the 4-week TnP. In the TnP, participants received RTG 600 mg/day for 3 weeks and RTG 750 mg/day in the last week. Participants that did not enroll in the OLE study completed a 3-week TaP and 1 week of FUP. |
| OG002 | Retigabine 900 mg/Day | Participants entered a 16-week TrP consisting of a 4-week TiP and a 12-week MP. In the TiP, participants received a starting dose of RTG 300 mg/day that increased by 150 mg/day per week until a target dose of 900 mg/day was reached. Participants that could not tolerate the titration or withdrew were discontinued from the study and entered the TaP/FUP. Participants who tolerated titration entered the MP and continued to receive 900 mg/day for 12 weeks. After completing the MP, participants who opted to enroll in the OLE study entered the 4-week TnP. In the TnP, participants received RTG 900 mg/day for 4 weeks. Participants that did not enroll in the OLE study completed a 3-week TaP and 1 week of FUP. |
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| OG001 | Retigabine 600 mg/Day | Participants entered a 16-week TrP consisting of a 4-week TiP and a 12-week MP. In the TiP, participants received a starting dose of retigabine (RTG) 300 mg/day that increased by 150 mg/day per week until a target dose of 600 mg/day was reached. Participants that could not tolerate the titration or withdrew were discontinued from the study and entered the TaP/FUP. Participants who tolerated titration entered the MP and continued to receive 600 mg/day for 12 weeks. After completing the MP, participants who opted to enroll in the OLE study entered the 4-week TnP. In the TnP, participants received RTG 600 mg/day for 3 weeks and RTG 750 mg/day in the last week. Participants that did not enroll in the OLE study completed a 3-week TaP and 1 week of FUP. |
| OG002 | Retigabine 900 mg/Day | Participants entered a 16-week TrP consisting of a 4-week TiP and a 12-week MP. In the TiP, participants received a starting dose of RTG 300 mg/day that increased by 150 mg/day per week until a target dose of 900 mg/day was reached. Participants that could not tolerate the titration or withdrew were discontinued from the study and entered the TaP/FUP. Participants who tolerated titration entered the MP and continued to receive 900 mg/day for 12 weeks. After completing the MP, participants who opted to enroll in the OLE study entered the 4-week TnP. In the TnP, participants received RTG 900 mg/day for 4 weeks. Participants that did not enroll in the OLE study completed a 3-week TaP and 1 week of FUP. |
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| OG001 |
| Retigabine 600 mg/Day |
Participants entered a 16-week TrP consisting of a 4-week TiP and a 12-week MP. In the TiP, participants received a starting dose of retigabine (RTG) 300 mg/day that increased by 150 mg/day per week until a target dose of 600 mg/day was reached. Participants that could not tolerate the titration or withdrew were discontinued from the study and entered the TaP/FUP. Participants who tolerated titration entered the MP and continued to receive 600 mg/day for 12 weeks. After completing the MP, participants who opted to enroll in the OLE study entered the 4-week TnP. In the TnP, participants received RTG 600 mg/day for 3 weeks and RTG 750 mg/day in the last week. Participants that did not enroll in the OLE study completed a 3-week TaP and 1 week of FUP. |
| OG002 | Retigabine 900 mg/Day | Participants entered a 16-week TrP consisting of a 4-week TiP and a 12-week MP. In the TiP, participants received a starting dose of RTG 300 mg/day that increased by 150 mg/day per week until a target dose of 900 mg/day was reached. Participants that could not tolerate the titration or withdrew were discontinued from the study and entered the TaP/FUP. Participants who tolerated titration entered the MP and continued to receive 900 mg/day for 12 weeks. After completing the MP, participants who opted to enroll in the OLE study entered the 4-week TnP. In the TnP, participants received RTG 900 mg/day for 4 weeks. Participants that did not enroll in the OLE study completed a 3-week TaP and 1 week of FUP. |
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| OG001 | Retigabine 600 mg/Day | Participants entered a 16-week TrP consisting of a 4-week TiP and a 12-week MP. In the TiP, participants received a starting dose of retigabine (RTG) 300 mg/day that increased by 150 mg/day per week until a target dose of 600 mg/day was reached. Participants that could not tolerate the titration or withdrew were discontinued from the study and entered the TaP/FUP. Participants who tolerated titration entered the MP and continued to receive 600 mg/day for 12 weeks. After completing the MP, participants who opted to enroll in the OLE study entered the 4-week TnP. In the TnP, participants received RTG 600 mg/day for 3 weeks and RTG 750 mg/day in the last week. Participants that did not enroll in the OLE study completed a 3-week TaP and 1 week of FUP. |
| OG002 | Retigabine 900 mg/Day | Participants entered a 16-week TrP consisting of a 4-week TiP and a 12-week MP. In the TiP, participants received a starting dose of RTG 300 mg/day that increased by 150 mg/day per week until a target dose of 900 mg/day was reached. Participants that could not tolerate the titration or withdrew were discontinued from the study and entered the TaP/FUP. Participants who tolerated titration entered the MP and continued to receive 900 mg/day for 12 weeks. After completing the MP, participants who opted to enroll in the OLE study entered the 4-week TnP. In the TnP, participants received RTG 900 mg/day for 4 weeks. Participants that did not enroll in the OLE study completed a 3-week TaP and 1 week of FUP. |
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| OG001 | Retigabine 600 mg/Day | Participants entered a 16-week TrP consisting of a 4-week TiP and a 12-week MP. In the TiP, participants received a starting dose of retigabine (RTG) 300 mg/day that increased by 150 mg/day per week until a target dose of 600 mg/day was reached. Participants that could not tolerate the titration or withdrew were discontinued from the study and entered the TaP/FUP. Participants who tolerated titration entered the MP and continued to receive 600 mg/day for 12 weeks. After completing the MP, participants who opted to enroll in the OLE study entered the 4-week TnP. In the TnP, participants received RTG 600 mg/day for 3 weeks and RTG 750 mg/day in the last week. Participants that did not enroll in the OLE study completed a 3-week TaP and 1 week of FUP. |
| OG002 | Retigabine 900 mg/Day | Participants entered a 16-week TrP consisting of a 4-week TiP and a 12-week MP. In the TiP, participants received a starting dose of RTG 300 mg/day that increased by 150 mg/day per week until a target dose of 900 mg/day was reached. Participants that could not tolerate the titration or withdrew were discontinued from the study and entered the TaP/FUP. Participants who tolerated titration entered the MP and continued to receive 900 mg/day for 12 weeks. After completing the MP, participants who opted to enroll in the OLE study entered the 4-week TnP. In the TnP, participants received RTG 900 mg/day for 4 weeks. Participants that did not enroll in the OLE study completed a 3-week TaP and 1 week of FUP. |
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| OG001 | Retigabine 600 mg/Day | Participants entered a 16-week TrP consisting of a 4-week TiP and a 12-week MP. In the TiP, participants received a starting dose of retigabine (RTG) 300 mg/day that increased by 150 mg/day per week until a target dose of 600 mg/day was reached. Participants that could not tolerate the titration or withdrew were discontinued from the study and entered the TaP/FUP. Participants who tolerated titration entered the MP and continued to receive 600 mg/day for 12 weeks. After completing the MP, participants who opted to enroll in the OLE study entered the 4-week TnP. In the TnP, participants received RTG 600 mg/day for 3 weeks and RTG 750 mg/day in the last week. Participants that did not enroll in the OLE study completed a 3-week TaP and 1 week of FUP. |
| OG002 | Retigabine 900 mg/Day | Participants entered a 16-week TrP consisting of a 4-week TiP and a 12-week MP. In the TiP, participants received a starting dose of RTG 300 mg/day that increased by 150 mg/day per week until a target dose of 900 mg/day was reached. Participants that could not tolerate the titration or withdrew were discontinued from the study and entered the TaP/FUP. Participants who tolerated titration entered the MP and continued to receive 900 mg/day for 12 weeks. After completing the MP, participants who opted to enroll in the OLE study entered the 4-week TnP. In the TnP, participants received RTG 900 mg/day for 4 weeks. Participants that did not enroll in the OLE study completed a 3-week TaP and 1 week of FUP. |
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