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Retigabine

Phase 3

Seizures | Small molecule | Neurology |GSK plc|Last Updated: Apr 21, 2017

Success Probability
Approval Probability 71%
TA Base Rate26%
Adjusted LOA41%
ML RiskLOW_RISK
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Market & Valuation
rNPV $3.2B
Market Size $9.4B
Revenue Basis $1.6B
Competitors 6
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Trial Design
RandomizedDouble-BlindPLACEBO_CONTROLLEDBiomarker
Total Trials2
Total Enrollment845
FDA Designations
No designations recorded
Clinical Trials (2)
NCT IDTitlePhaseStatusEnrollmentVelocityDesignStartCompletionLast UpdatedSitesCountries
NCT00235755Retigabine Efficacy and Safety Trial for Partial Onset Refractory Seizures in EpilepsyPHASE3 COMPLETED 539Dec 1, 2005Apr 1, 2008Apr 21, 201770 United States, Australia +11
NCT00232596Retigabine (Adjunctive Therapy) Efficacy and Safety Study for Partial Onset Refractory Seizures in EpilepsyPHASE3 COMPLETED 306Sep 1, 2005Jan 1, 2008Dec 8, 201654 United States, Argentina +3
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Study Endpoints
Primary Endpoints
Percent Change in the 28-day Total Partial Seizure (PS) Frequency From Baseline (BL) to the End of the Double-blind (DB) Phase (Titration and Maintenance Phases)
Baseline (Week -7 through Week 0), DB Phase (Week 1 through Week 16)

28-day total PS (PSs \[also called focal seizures\] are seizures limited to a specific area of the brain) frequency in the BL period = (Number \[No.\] of total PSs reported in the BL period divided by the No. of days of available total PS data in the BL period) x 28 days. 28-day total PS frequency in the DB period = (No. of total PSs reported in the DB period divided by the No. of days of available total PS data in the DB period) x 28 days. Percent change = (\[value in the DB period minus value at BL\] divided by the BL value) x 100%. Negative valu es indicate a reduction in seizure frequency.

Number of Participants Classified as Responders and Non-responders During the Maintenance Phase
Week 5 through Week 16

Responders were participants with at least a 50% reduction in the 28-day total partial seizure frequency in the Maintenance Phase as compared to the Baseline period.

Number of Participants Who Were Responders and Non-responders in the Maintenance Phase
Week 7 through Week 18

Responders were participants with at least a 50% reduction in the 28-day total partial seizure frequency in the Maintenance Phase as compared to the Baseline period.

Secondary Endpoints
Number of Participants Who Were Responders and Non-responders During the DB Phase
Week 1 through Week 16
Percent Change From Baseline (BL) in the 28-day Total Partial Seizure Frequency During the Maintenance Phase
Baseline (Week -7 through Week 0), Week 5 through Week 16
Number of Participants With a Reduction in the 28-day Total Partial Seizure Frequency From Baseline to the End of DB Phase (Titration and Maintenance Phases) by Indicated Quartile Reduction Categories
Baseline (Week -7 through Week 0), Week 1 through Week 16
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Study Design & Arms
AllocationRANDOMIZED
MaskingDOUBLE
ModelPARALLEL
PurposeTREATMENT
Treatment Arms
ArmTypeDescription
PlaceboPLACEBO_COMPARATOR -
Retigabine 600 mgEXPERIMENTAL -
Retigabine 900 mgEXPERIMENTAL -
RetigabineEXPERIMENTAL -
Interventions
NameTypeDescription
RetigabineDRUGOral tablet. The starting daily dose will be 300 mg/day administered orally in three equally divided doses. This dosage will be increased by 150 mg/day (50 mg/dose) at 1-week intervals (titration phase). At the beginning of Week 3, patients will enter a 12 week maintenance phase.
PlaceboDRUGOral tablet.
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Eligibility Criteria
Age Range18 Years — 75 Years
SexALL
Healthy VolunteersNo
Study Sites70

Inclusion Criteria: * Diagnosis of refractory epilepsy with simple or complex partial onset seizures with or without secondary generalization * 28-day partial seizure frequency rate of four or more partial seizures over the 8-week baseline phase * Currently treated with up to three established AEDs...

Countries:United StatesAustraliaBelgiumFranceGermanyHungaryIsraelPolandRussiaSouth AfricaSpainUkraineUnited KingdomArgentinaBrazilCanadaMexico
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