Phase 3 study for people with Epilepsy

By invitation Phase 3

Sources: ClinicalTrials.gov Checked: 15 October 2026 Not medical advice

This trial at a glance

Status By invitation
Phase Phase 3
Sponsor Xenon Pharmaceuticals Inc.
Registry number NCT05718817
Started 25 April 2023 Today 16 October 2026 Estimated completion 1 April 2033

Where this trial is running

Trial sites and the status recorded for each
SiteCityState or countryStatus at this site
Prince of Wales Hospital Randwick NSW Status not stated
Royal Prince Alfred Hospital Camperdown NSW Status not stated
St Vincent's Hospital Melbourne Fitzroy VIC Status not stated
Austin Health Pharmacy Clinical Trials Heidelberg VIC Status not stated
Southern Neurology Kogarah NSW Status not stated
Alfred Hospital Neurology CT Dept of Neuroscience Melbourne Australia Status not stated
The Royal Melbourne Hospital Parkville VIC Status not stated
Mater Misericordiae Ltd South Brisbane South Brisbane QLD Status not stated
Westmead Hospital Dept. of Neurology Epilepsy Unit Westmead NSW Status not stated

voxsanity.com.au · trial sites from public registries · registry record synced 15 October 2026 · not medical advice

Who can join

Age 12 Years and over
Sex Anyone, regardless of sex
Healthy volunteers Not accepted
Enrolment target 880

The official eligibility criteria

Registry text, reproduced exactly. These are the words the trial's sponsor published on ClinicalTrials.gov. They have not been edited, shortened or rewritten, and they are written for researchers rather than for patients.

Inclusion Criteria:

1. Subject must be properly informed of the nature and risks of the study and give informed consent in writing prior to entering the study (for adult subjects) and for adolescent subject's parent/legal guardian and subject gives informed consent or assent in writing prior to entering the study.

2. Subject must have successfully completed the double-blind treatment period (DBP) and have not terminated early from Study X-TOLE2, X-TOLE3, or X-ACKT, met all eligibility requirements, and had no important protocol deviations (in the opinion of the sponsor) or adverse events (AEs) (in the opinion of the investigator) that would preclude the subject's entry into the long-term extension study.

3. In the opinion of the investigator, the subject is able to understand verbal and written instructions and will adhere to all study schedules and requirements.

4. Subject is able to keep accurate seizure diaries.

Exclusion Criteria:

1. Subject met any of the withdrawal criteria while in Study X-TOLE2, X-TOLE3, or X-ACKT.

2. Subject has any medical condition, personal circumstance, or ongoing AE (from Study X-TOLE2, X-TOLE3, or X-ACKT) that, in the opinion of the investigator, exposes the subject to unacceptable risk by participating in the study, or prevents adherence to the protocol.

3. Subject is planning to enter a clinical study with a different investigational drug or planning to use any experimental device for treatment of epilepsy or any other medical condition during the study and until 28 days after completion of this study.

Dates on the record

Started 25 April 2023
Estimated completion 1 April 2033
Registry last updated 8 October 2026
Checked by Voxsanity 15 October 2026

Results, publications and the official record

Sources and dates

  • ClinicalTrials.gov – the record this page reformats
  • ClinicalTrials.gov processing date: 8 October 2026.
  • This page last checked by Voxsanity: 15 October 2026.

Voxsanity reformats data from public registries into this layout. It does not edit, interpret or add to what the registry published.

Not medical advice.

Individual trial records are refreshed on a rolling basis rather than all at once, so a record may be up to several weeks old. Each trial page and trial card shows the date its own record was last synced. Where a record has lagged, its status, sites and enrolment can differ from the current registry state in either direction, so check the registry link on the trial page before acting on them.

Letter for your doctor

A one-page summary of this trial to print or email to your GP. It carries the registry's own record of the trial and its eligibility criteria, and nothing Voxsanity has written about whether it suits you.