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Trial details imported from ClinicalTrials.gov

For full trial details, please see the original record at https://clinicaltrials.gov/ct2/show/NCT03739840




Registration number
NCT03739840
Ethics application status
Date submitted
9/11/2018
Date registered
14/11/2018
Date last updated
21/12/2022

Titles & IDs
Public title
A Study to Test the Efficacy and Safety of Padsevonil as Treatment of Focal-onset Seizures in Adult Subjects With Drug-resistant Epilepsy
Scientific title
A Multicenter, Randomized, Double-Blind, Placebo-Controlled, Parallel-Group Study to Evaluate the Efficacy and Safety of Padsevonil as Adjunctive Treatment of Focal-Onset Seizures in Adult Subjects With Drug-Resistant Epilepsy
Secondary ID [1] 0 0
2018-002303-33
Secondary ID [2] 0 0
EP0092
Universal Trial Number (UTN)
Trial acronym
DUET
Linked study record

Health condition
Health condition(s) or problem(s) studied:
Drug-Resistant Epilepsy 0 0
Focal-Onset Seizures 0 0
Condition category
Condition code
Neurological 0 0 0 0
Epilepsy
Neurological 0 0 0 0
Other neurological disorders

Intervention/exposure
Study type
Interventional
Description of intervention(s) / exposure
Treatment: Drugs - Padsevonil
Treatment: Drugs - Placebo

Experimental: Padsevonil dosing regimen 1 - Subjects will be randomized to receive a combination of tablets of padsevonil and placebo (as appropriate) to maintain the blinding.

Experimental: Padsevonil dosing regimen 2 - Subjects will be randomized to receive a combination of tablets of padsevonil and placebo (as appropriate) to maintain the blinding.

Experimental: Padsevonil dosing regimen 3 - Subjects will be randomized to receive a combination of tablets of padsevonil and placebo (as appropriate) to maintain the blinding.

Placebo Comparator: Placebo - Subjects randomized to the placebo group will receive a combination of several placebo tablets to maintain the blinding.


Treatment: Drugs: Padsevonil
Padsevonil in different dosages.

Treatment: Drugs: Placebo
Placebo will be provided matching padsevonil.
Intervention code [1] 0 0
Treatment: Drugs
Comparator / control treatment
Control group

Outcomes
Primary outcome [1] 0 0
Change in Log-transformed Observable Focal-onset Seizure Frequency From Baseline Over the 12-week Maintenance Period
Timepoint [1] 0 0
From Baseline over the 12 Week Maintenance Period (up to Week 16)
Primary outcome [2] 0 0
Percentage of Participants With Treatment-Emergent Adverse Events (TEAEs)
Timepoint [2] 0 0
From Baseline until Safety Follow-Up (up to Week 23)
Primary outcome [3] 0 0
Percentage of Participants With Treatment-Emergent Adverse Events (TEAEs) Leading to Study Withdrawal
Timepoint [3] 0 0
From Baseline until Safety Follow-Up (up to Week 23)
Primary outcome [4] 0 0
Percentage of Participants With Treatment-Emergent Serious Adverse Events (SAEs)
Timepoint [4] 0 0
From Baseline until Safety Follow-Up (up to Week 23)
Secondary outcome [1] 0 0
75% Responder Rate From Baseline Over the 12-week Maintenance Period
Timepoint [1] 0 0
From Baseline over the 12 Week Maintenance Period (up to Week 16)
Secondary outcome [2] 0 0
50% Responder Rate From Baseline Over the 12-week Maintenance Period
Timepoint [2] 0 0
From Baseline over the 12 Week Maintenance Period (up to Week 16)
Secondary outcome [3] 0 0
Percent Change in Observable Focal-onset Seizure Frequency From Baseline Over the 12-week Maintenance Period
Timepoint [3] 0 0
From Baseline over the 12 Week Maintenance Period (up to Week 16)

Eligibility
Key inclusion criteria
- Diagnosis of focal epilepsy per 1989 International League Against Epilepsy (ILAE)
criteria at least 3 years before study entry

- Subject has failed to achieve seizure control with >=4 tolerated and appropriately
chosen prior antiepileptic drugs (AED), including past and ongoing treatment, that
were individually optimized for adequate dose and duration. Prior discontinued AED
treatment would need to be assessed by the Investigator considering the patient
medical records and patient and/or caregiver interview. 'Prior AED' is defined as all
past and ongoing AED treatments with a start date before the Screening Visit (Visit 1)

- Average of >= 4 spontaneous and observable focal seizures (type IA1 (i.e. focal
aware), IB (i.e. focal impaired awareness), IC (i.e. focal to bilateral tonic-clonic))
per month

- Current treatment with an individually optimized and stable dose of at least 1 and up
to 3 AEDs for the 8 weeks prior to the Screening Visit with or without additional
Vagus Nerve Stimulation (VNS) or other neurostimulation treatments
Minimum age
18 Years
Maximum age
No limit
Sex
Both males and females
Can healthy volunteers participate?
No
Key exclusion criteria
- Subject has a history of or signs of generalized or combined generalized and focal
epilepsy

- Cluster seizures which are uncountable in the previous 8 weeks before study entry and
during 4 weeks prospective baseline

- Current treatment with carbamazepine, phenytoin, primidone, phenobarbital

- Current treatment/ use of (non-AED) prescription, nonprescription, dietary (eg,
grapefruit or passion fruit), or herbal products that are potent inducers or
inhibitors of the CYP3A4 or 2C19 pathway for 2 weeks (or 5 half-lives, whichever is
longer) prior to the Baseline Visit

- Subjects taking sensitive substrates of CYP2C19 for 2 weeks (or 5 half-lives,
whichever is longer) prior to the Baseline Visit

- Subject has been taking vigabatrin less than 2 years at study entry

- Subject has been taking felbamate for less than 12 months

- Subject taking retigabine for less than 4 years

- Current treatment with benzodiazepines (i.e. GABA-A-ergic drugs like zolpidem,
zaleplon, or zopiclone, excluding GABA-A-ergic AEDs) <3 times per week for emergencies

- Subject has a current medical condition that occurred within the last 12 months which,
in the opinion of the investigator, could compromise his/her safety or ability to
participate in this study

Study design
Purpose of the study
Treatment
Allocation to intervention
Randomised controlled trial
Procedure for enrolling a subject and allocating the treatment (allocation concealment procedures)
Methods used to generate the sequence in which subjects will be randomised (sequence generation)
Masking / blinding
Blinded (masking used)
Who is / are masked / blinded?
The people receiving the treatment/s
The people administering the treatment/s
The people assessing the outcomes
The people analysing the results/data
Intervention assignment
Parallel
Other design features
Phase
Phase 3
Type of endpoint/s
Statistical methods / analysis

Recruitment
Recruitment status
Terminated
Data analysis
Reason for early stopping/withdrawal
Other reasons
Date of first participant enrolment
Anticipated
Actual
6/03/2019
Date of last participant enrolment
Anticipated
Actual
Date of last data collection
Anticipated
Actual
28/09/2020
Sample size
Target
Accrual to date
Final
232
Recruitment in Australia
Recruitment state(s)
Recruitment hospital [1] 0 0
Ep0092 855 - Box Hill
Recruitment hospital [2] 0 0
Ep0092 861 - Camperdown
Recruitment hospital [3] 0 0
Ep0092 850 - Fitzroy
Recruitment hospital [4] 0 0
Ep0092 853 - Heidelberg
Recruitment hospital [5] 0 0
Ep0092 852 - Melbourne
Recruitment postcode(s) [1] 0 0
- Box Hill
Recruitment postcode(s) [2] 0 0
- Camperdown
Recruitment postcode(s) [3] 0 0
- Fitzroy
Recruitment postcode(s) [4] 0 0
- Heidelberg
Recruitment postcode(s) [5] 0 0
- Melbourne
Recruitment outside Australia
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Funding & Sponsors
Primary sponsor type
Commercial sector/Industry
Name
UCB Biopharma SRL
Address
Country

Ethics approval
Ethics application status

Summary
Brief summary
The purpose of the study is to evaluate the efficacy, safety and tolerability of the 3
selected dose regimens of padsevonil (PSL) administered concomitantly with up to 3
anti-epileptic drugs (AEDs) compared with placebo for treatment of observable focal-onset
seizures in subjects with drug-resistant epilepsy.
Trial website
https://clinicaltrials.gov/ct2/show/NCT03739840
Trial related presentations / publications
Public notes

Contacts
Principal investigator
Name 0 0
UCB Cares
Address 0 0
001 844 599 2273 (UCB)
Country 0 0
Phone 0 0
Fax 0 0
Email 0 0
Contact person for public queries
Name 0 0
Address 0 0
Country 0 0
Phone 0 0
Fax 0 0
Email 0 0
Contact person for scientific queries



Summary Results

For IPD and results data, please see https://clinicaltrials.gov/ct2/show/NCT03739840