Study to Test the Safety and Efficacy of Padsevonil as Adjunctive Treatment of Focal-onset Seizures in Adult Subjects With Drug-resistant Epilepsy
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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: NCT03370120 |
Recruitment Status :
Completed
First Posted : December 12, 2017
Last Update Posted : January 29, 2021
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Condition or disease | Intervention/treatment | Phase |
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Drug-Resistant Epilepsy Focal-Onset Seizures | Drug: Padsevonil | Phase 2 Phase 3 |
Study Type : | Interventional (Clinical Trial) |
Actual Enrollment : | 406 participants |
Allocation: | N/A |
Intervention Model: | Single Group Assignment |
Masking: | None (Open Label) |
Primary Purpose: | Treatment |
Official Title: | An Open-Label, Multicenter, Extension Study to Evaluate the Safety and Efficacy of Padsevonil as Adjunctive Treatment of Focal-Onset Seizures in Adult Subjects With Drug-Resistant Epilepsy |
Actual Study Start Date : | August 27, 2018 |
Actual Primary Completion Date : | December 11, 2020 |
Actual Study Completion Date : | December 11, 2020 |

Arm | Intervention/treatment |
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Experimental: Padsevonil
Padsevonil will be administered in an open-label manner. The individual starting dose of each subject will be the one at the end of the parent study. Once subjects enter EP0093 further individual dose adjustments are allowed after 1 week to the extent possible with the combination of tablet strengths available. |
Drug: Padsevonil
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- Incidence of Treatment-Emergent Adverse Events (TEAEs) reported by the subject and/or caregiver or observed by the investigator during the entire study [ Time Frame: From Entry Visit (Week 0) until the Safety Follow-up Visit (up to 2 years) ]An Adverse Event is any untoward medical occurrence in a patient or clinical investigation subject administered a pharmaceutical product that does not necessarily have a causal relationship with this treatment.
- Incidence of Treatment-Emergent Adverse Events (TEAEs) leading to study withdrawal [ Time Frame: From Entry Visit (Week 0) until the Safety Follow-up Visit (up to 2 years) ]An Adverse Event is any untoward medical occurrence in a patient or clinical investigation subject administered a pharmaceutical product that does not necessarily have a causal relationship with this treatment.
- Change in log-transformed observable focal-onset seizure frequency from Baseline over the Evaluation Period [ Time Frame: From Baseline in respective parent study over the Evaluation Period (minimum of 2 years) ]Seizure frequency refers to 28-day adjusted frequency. Observable focal-onset seizures refer to Type IAl, IB, and IC (according to the International League Against Epilepsy (ILAE) Classification of Epileptic Seizures, 1981). Focal-onset seizures include all Type I seizures.

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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:
- Subject is an adult (18 years of age or more )
- Subject with epilepsy who has completed 1 of the previous Padsevonil (PSL) studies which allow access to the present study
- Female subjects of child bearing potential must have a serum negative pregnancy test at the Entry Visit, which is confirmed to be negative by urine testing prior to further dispensing at each study visit thereafter. Subjects will be withdrawn from the study as soon as pregnancy is known. Female subjects will use an efficient form of contraception for the duration of the study and for a period of 3 months after their final dose of PSL.
Exclusion Criteria:
- Subject has any severe medical, neurological, or psychiatric condition, or laboratory value which may have an impact on the safety of the subject
- Subject has active suicidal ideation as indicated by a positive response ('Yes') to either Question 4 or Question 5 of the 'Since Last Visit' version of the Columbia-Suicide Severity Rating Scale (C-SSRS)
- Subject has >2x upper limit of normal (ULN) of any of the following: alanine aminotransferase (ALT), aspartate aminotransferase (AST), alkaline phosphatase (ALP), or >ULN total bilirubin (>= l.5x ULN total bilirubin if known Gilbert's syndrome) at the Entry Visit
- Subject has a clinically-significant abnormality on electrocardiogram (ECG) that, in the opinion of the investigator, increases the risks associated with participating in the study
- Subject has an abnormality on echocardiogram at last echocardiogram assessment, or foreseen in parent study as assessed by central reader that is accompanied by clinical symptoms or a Grade 2* (or higher)/moderate severity abnormality, or a history of rheumatic heart disease, or other known valvular abnormalities (*according to the ASE Guidelines, 2017; Zoghbi et al 2017)
- Female subject who plans to be pregnant or is breastfeeding

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): NCT03370120

Study Director: | UCB Cares | 001 844 599 2273 (UCB) |
Responsible Party: | UCB Biopharma S.P.R.L. |
ClinicalTrials.gov Identifier: | NCT03370120 |
Other Study ID Numbers: |
EP0093 2017-003241-26 ( EudraCT Number ) |
First Posted: | December 12, 2017 Key Record Dates |
Last Update Posted: | January 29, 2021 |
Last Verified: | January 2021 |
Studies a U.S. FDA-regulated Drug Product: | Yes |
Studies a U.S. FDA-regulated Device Product: | No |
Product Manufactured in and Exported from the U.S.: | No |
Drug-Resistant Epilepsy Padsevonil |
Epilepsy Seizures Drug Resistant Epilepsy Brain Diseases |
Central Nervous System Diseases Nervous System Diseases Neurologic Manifestations |