Evaluating the safety of cenobamate for Japanese patients with partial seizures

A Phase 2, Multicenter Open-Label Extension Study to Evaluate the Long-term Safety of Cenobamate in Japanese Subjects With Partial Onset Seizures

PHASE2 · Ono Pharmaceutical Co., Ltd. · NCT06590896

This study is testing how safe cenobamate is for Japanese patients with partial seizures who have already taken part in a related study.

Quick facts

PhasePHASE2
Study typeInterventional
Enrollment100 (estimated)
SexAll
SponsorOno Pharmaceutical Co., Ltd. (industry)
Locations29 sites (Ehime and 28 other locations)
Trial IDNCT06590896 on ClinicalTrials.gov

What this trial studies

This clinical trial aims to assess the long-term safety and tolerability of cenobamate in Japanese patients suffering from partial onset seizures. Participants must have previously completed a related study and will be monitored for any adverse effects or changes in their medical condition. The study focuses on gathering data to ensure that cenobamate is a safe treatment option for this specific population.

Who should consider this trial

Good fit: Ideal candidates for this study are Japanese individuals who have previously participated in the related study YKP3089C035.

Not a fit: Patients who have previously discontinued from the core study or have significant medical history changes may not benefit from this study.

Why it matters

Potential benefit: If successful, this study could provide a new, safe treatment option for Japanese patients with partial onset seizures.

How similar studies have performed: While this approach is focused on a specific population, similar studies evaluating the safety of new epilepsy treatments have shown promising results.

Eligibility criteria

Show full inclusion / exclusion criteria
Inclusion Criteria:

* Subjects completed Study YKP3089C035 by SK Life Science.

Exclusion Criteria:

* Subjects that have previously discontinued for any reason from the Core study (YKP3089C035).
* Any significant changes to the medical history of the subject that in the opinion of the investigator, could affect the safety of the subject.

Where this trial is running

Ehime and 28 other locations

Study contacts

How to participate

  1. Review the eligibility criteria above with your treating physician.
  2. Visit the official trial page on ClinicalTrials.gov for the most current contact information and recruitment status.
  3. Contact the listed study coordinator or principal investigator to request pre-screening. Pre-screening is free and never obligates you to enroll.

View on ClinicalTrials.gov →

Conditions: Epilepsies, Partial

Last reviewed 2026-05-15 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.