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Efficacy and Safety of Eslicarbazepine Acetate as Adjunctive Therapy for Refractory Partial Epilepsy

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details.
ClinicalTrials.gov Identifier: NCT00957372
Recruitment Status : Completed
First Posted : August 12, 2009
Results First Posted : August 5, 2013
Last Update Posted : July 2, 2014
Information provided by (Responsible Party):
Bial - Portela C S.A.

Brief Summary:
The primary objective was to evaluate the efficacy of eslicarbazepine acetate (ESL) administered once daily at 1200 mg or 800 mg, compared with placebo as adjunctive therapy in patients with refractory partial epilepsy over a 12-week maintenance period.

Condition or disease Intervention/treatment Phase
Partial Epilepsy Drug: eslicarbazepine acetate Drug: placebo (Part I) Drug: ESL - Open-label Extension (Part II) Phase 3

Detailed Description:

This was a phase III, 2-part multicenter study. Part I was an 26-week parallel-group, randomized, placebo-controlled design consisting of an 8 week baseline period, a 2 week double-blinded titration period, 12 week maintenance period, and a 4 week tapering-off period. After completing the baseline period, patients were randomized in a 1:1:1 ratio to 1 of the 2 ESL daily dose levels (1200 or 800 mg) or placebo.

Part II was a 1-year open-label extension for patients who had completed Part I. Starting at 800 mg/day, the dosage could be titrated at 400 mg intervals down to a minimum of 400 mg/day or up to a maximum of 1200 mg/day. Patients who completed Part II could participate in a study extension and continue treatment with ESL until marketing authorization is obtained or clinical development is discontinued, with visits scheduled at the discretion of the investigator but at least every 6 months.

Results from Part I & II were presented in two separate reports.

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Study Type : Interventional  (Clinical Trial)
Actual Enrollment : 253 participants
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Quadruple (Participant, Care Provider, Investigator, Outcomes Assessor)
Primary Purpose: Treatment
Official Title: Efficacy and Safety of BIA 2-093 as Adjunctive Therapy for Refractory Partial Seizures in a Double-blind, Randomized, Placebo-controlled, Parallel-group, Multicenter Clinical Trial
Study Start Date : December 2004
Actual Primary Completion Date : June 2008
Actual Study Completion Date : June 2008

Arm Intervention/treatment
Experimental: ESL 800 mg daily (Part I)
ESL 800mg daily
Drug: eslicarbazepine acetate
oral tablet, 800 mg or 1200 mg once daily
Other Name: Zebinix

Experimental: ESL 1200 mg daily (Part I)
ESL 1200mg daily
Drug: eslicarbazepine acetate
oral tablet, 800 mg or 1200 mg once daily
Other Name: Zebinix

Placebo Comparator: placebo (Part I)
Drug: placebo (Part I)
once daily placebo comparator

Experimental: ESL - Open-label Extension (Part II)
All patients were treated with only ESL during Part II.
Drug: ESL - Open-label Extension (Part II)
Part II was a 1-year open-label extension for patients who had completed Part I. Starting at 800 mg/day, the dosage could be titrated at 400 mg intervals down to a minimum of 400 mg/day or up to a maximum of 1200 mg/day

Primary Outcome Measures :
  1. Seizure Frequency [ Time Frame: 12 weeks ]
    The primary efficacy endpoint is the natural log transformation of the seizure frequency per 4 weeks. The primary efficacy analysis was based on results for the ITT population during the 12-week maintenance period. Seizure frequency was compared between each active treatment group and the placebo group using an ANCOVA model with treatment as a factor and seizure frequency as a covariate

  2. PART II: Nº of Treatment-Emergent Adverse Events (TEAE) [ Time Frame: 1-year ]
    The primary objective for Part II of the study was to evaluate the safety and tolerability of eslicarbazepine acetate (ESL, BIA 2-093) at doses titrated to an efficacy or safety endpoint over a 1-year open-label period. Safety assessments were based primarily on AEs (Number of participants with at least one treatment-emergent adverse events are reported); assessment of AEs was based on treatment relatedness, action taken on study drug, outcome, and causality.

Information from the National Library of Medicine

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Ages Eligible for Study:   18 Years and older   (Adult, Older Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • written informed consent signed by patient
  • aged 18 years or more
  • documented diagnosis of simple or complex partial seizures with or without secondary generalisation since at least 12 months prior to screening
  • at least 4 partial seizures in each 4 week period during the last 8 weeks prior to screening, currently treated with 1 or 2 AEDs (any except oxcarbazepine and felbamate), in a stable dose regimen during at least 2 months prior to screening (patients using vigabatrin should have been on this medication for at least 1 year with no deficit in visual field identified)
  • excepting epilepsy, patient is judged to be in general good health based on medical history, physical examination and laboratory tests
  • post-menopausal or otherwise incapable of becoming pregnant by reason of surgery or tubal ligation; in case of woman of childbearing potential, patient must present a serum beta-hCG test consistent with a non-gravid state and agree to remain abstinent or use reliable contraception (oral contraception should be combined with a barrier method)

Exclusion Criteria:

  • only simple partial seizures with no motor symptomatology (classified as A2-4 according to the International Classification of Epileptic Seizures) that are not video-EEG documented
  • primarily generalised epilepsy
  • known rapid progressive neurological disorder; history of status epilepticus or cluster seizures (i.e., 3 or more seizures within 30 minutes) within the 3 months prior to screening
  • seizures of psychogenic origin within the last 2 years
  • history of schizophrenia or suicide attempt
  • currently on or with exposure to felbamate or oxcarbazepine more within one month of screening
  • using benzodiazepines on more than on an occasional basis (except when used chronically as AED)
  • previous use of ESL or participation in a clinical study with ESL
  • known hypersensitivity to carbamazepine, oxcarbazepine or chemically related substances
  • history of abuse of alcohol, drugs or medications within the last 2 years
  • uncontrolled cardiac, renal, hepatic, endocrine, gastrointestinal, metabolic, haematological or oncology disorder
  • second or third-degree atrioventricular blockade not corrected with a pacemaker
  • relevant clinical laboratory abnormalities

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT00957372

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Bial - Portela & Cª, S.A.
S. Mamede do Coronado, Portugal, 4745-457
Sponsors and Collaborators
Bial - Portela C S.A.
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Principal Investigator: Antonio Gil-Nagel, MD Hospital Ruber Internacional La Masó 38, Mirasierra 28034 Madrid, Spain
Principal Investigator: Jose Lopes-Lima, MD Hospital Santo António Largo Prof. Abel Salazar, 4099-001 Porto, Portugal
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Responsible Party: Bial - Portela C S.A.
ClinicalTrials.gov Identifier: NCT00957372    
Other Study ID Numbers: BIA-2093-303
First Posted: August 12, 2009    Key Record Dates
Results First Posted: August 5, 2013
Last Update Posted: July 2, 2014
Last Verified: June 2014
Keywords provided by Bial - Portela C S.A.:
Additional relevant MeSH terms:
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Epilepsies, Partial
Brain Diseases
Central Nervous System Diseases
Nervous System Diseases
Eslicarbazepine acetate
Voltage-Gated Sodium Channel Blockers
Sodium Channel Blockers
Membrane Transport Modulators
Molecular Mechanisms of Pharmacological Action