A Trial of the Efficacy and Safety of CVL-865 as Adjunctive Therapy in the Treatment of Focal Onset Seizures

Inclusion Criteria: * Participants with a diagnosis of epilepsy with focal onset, as defined in the International League Against Epilepsy (ILAE) Classification of Seizures, focal aware (except participants with only focal aware seizures without a motor component), focal impaired awareness, and focal to bilateral tonic-clonic seizures for at least 2 years prior to signing the Informed Consent Form (ICF) * Participants must have history of an average of 4 or more spontaneous and observable focal onset, as defined in the ILAE Classification of Seizures, focal aware (except participants with only focal aware seizures without a motor component), focal impaired awareness, and focal to bilateral tonic-clonic seizures per 28-day period for at least 3 months (84 days) prior to signing the ICF * Participants who have tried and failed at least 2 appropriate Anti- epileptic drugs (AEDs) in the past and also currently taking 1 to 3 permitted AEDs at a stable dose for 4 Weeks prior to the Screening Visit * Participants with a minimum of 8 focal onset, focal aware, focal impaired awareness, or focal to bilateral tonic-clonic seizures during the 8 week baseline period with no 21-day period free of any of these seizure types * Participants must have had magnetic resonance imaging or contrast enhance computed tomography scan of the brain that demonstrated no progressive structural central nervous system abnormality at the time of the diagnosis of epilepsy * Participants must have a body mass …