RecruitingPhase 3Drug trialA Study to Evaluate XEN1101 as Adjunctive Therapy in Primary Generalized Tonic-Clonic SeizuresThis is a Phase 3, multicenter, randomized, double-blind, placebo-controlled study to evaluate the clinical efficacy, safety, and tolerability of XEN1101 administered as adjunctive treatment in primary generalized tonic-clonic seizures (PGTCS).