Last updated on September 2020

A Randomized, Double Blind, Placebo Controlled, Multicenter Study to Evaluate the Safety, Tolerability and Efficacy of XEN1101 as Adjunctive Therapy in Focal Onset Epilepsy


Are you eligible to participate in this study?

You may be eligible for this study if you meet the following criteria:

  • Conditions: Seizure Disorders (Pediatric) | Epilepsy | Seizure Disorders
  • Age: Between 18 - 75 Years
  • Gender: Male or Female

Key Inclusion Criteria:

  • Be properly informed of the nature and risks of the study and give informed consent in writing, prior to entering the study
  • BMI <35 kg/m2
  • Diagnosis (≥2 years) of focal epilepsy according to the International League Against Epilepsy [ILAE] Classification of Epilepsy (2017)
  • Treatment with a stable dose of 1 to 3 allowable current AEDs for at least one month prior to screening, during baseline, and throughout the duration of the study
  • Must be willing to comply with the contraception requirements
  • Able to keep accurate seizure diaries

Key Exclusion Criteria:

  • History of pseudoseizures, psychogenic seizures, primary generalized seizure, or focal aware non-motor seizures only
  • Presence or previous history of Lennox-Gastaut syndrome
  • Seizures secondary to other diseases or conditions
  • History of repetitive seizures within the last 12 months where the individual seizures cannot be counted
  • History of neurosurgery for seizures <1 year prior to enrollment, or radiosurgery <2 years prior to enrollment
  • Schizophrenia and other psychotic disorders, or active suicidal plan/intent in the past 6 months, or a history of suicide attempt in the last 2 years, or more than 1 lifetime suicide attempt
  • History or presence of any significant medical or surgical condition or uncontrolled medical illness at screening, or history of cancer within the past 2 years, with the exception of appropriately treated basal cell or squamous cell carcinoma
  • Any clinically significant abnormalities on pre-study physical examination, vital signs, laboratory values or ECG indicating a medical problem that would preclude study participation
  • Past use of vigabatrin without stable visual fields tested twice over the 12 months after the last dose of vigabatrin (concomitant use of vigabatrin is not allowed)
  • If felbamate is used as a concomitant AED, patients must be taking it for at least 2 years, with a stable dose for ≥49 days and acceptable hematology and LFT values (or discontinued felbamate no less than 49 days) prior to Screening.
  • Have had multiple drug allergies or a severe drug reaction to an AED(s), including dermatological (e.g., Stevens-Johnson syndrome), hematological, or organ toxicity reactions
  • Current use of a ketogenic diet

Recruitment Status: Closed


Brief Description Eligibility Contact Research Team


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