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Retigabine

Phase 3

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

Success Probability

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Trial Design

RandomizedDouble-BlindPLACEBO_CONTROLLED
Total Trials2
Total Enrollment845

FDA Designations

No designations recorded

Clinical trial landscape

Retigabine · 2 trials · 1 indication

Phase 3 2
NCT00235755Retigabine Efficacy and Safety Trial for Partial Onset Refractory Seizures in EpilepsySeizures
COMPLETED539 Analytics
NCT00232596Retigabine (Adjunctive Therapy) Efficacy and Safety Study for Partial Onset Refractory Seizures in EpilepsySeizures
COMPLETED306 Analytics
PHASE3COMPLETED
Retigabine Efficacy and Safety Trial for Partial Onset Refractory Seizures in Epilepsy
SeizuresUnlock trial analytics
PHASE3COMPLETED
Retigabine (Adjunctive Therapy) Efficacy and Safety Study for Partial Onset Refractory Seizures in Epilepsy
SeizuresUnlock trial analytics

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 to 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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Frequently asked questions about Retigabine

What is Retigabine used for?

Retigabine is an investigational small molecule being studied for the treatment of seizures and epilepsy. It is specifically being evaluated as adjunctive therapy for partial onset refractory seizures in epilepsy, targeting adult patients aged 18 years and older.

What does Retigabine target?

Retigabine is a small molecule that acts as a potassium channel opener. It works by enhancing the activity of KCNQ potassium channels in the brain, which helps stabilize neuronal activity and reduce the abnormal electrical discharges that cause seizures.

Who makes Retigabine?

Retigabine is being developed by GSK plc, a pharmaceutical company listed on the stock exchange under the ticker symbol GSK. The company has conducted clinical trials to evaluate the drug's efficacy and safety in patients with epilepsy.

What phase is Retigabine in?

Retigabine is in Phase 3 clinical development. It has completed two Phase 3 trials for partial onset refractory seizures in epilepsy, with a total of 845 patients enrolled across multiple countries. The drug is investigational and has not been approved by regulatory authorities.

What clinical trials is Retigabine in?

Retigabine has completed two Phase 3 trials: NCT00232596 with 306 patients and NCT00235755 with 539 patients, both studying adjunctive therapy for partial onset refractory seizures. A Phase 1 trial, NCT01480609, examined the effect of haemodialysis on the drug's pharmacokinetics in epilepsy patients.

Is Retigabine the same as Ezogabine?

Yes, Retigabine is also known as Ezogabine. The Phase 1 trial NCT01480609 specifically studied the effect of haemodialysis on the pharmacokinetics of Ezogabine/Retigabine and its N-acetyl metabolite, confirming that both names refer to the same drug.