Core Insights - Xenon Pharmaceuticals Inc. announced new data on its commitment to epilepsy treatment, including interim 48-month data from the X-TOLE open-label extension study of azetukalner, real-world studies on depression burden, and pre-clinical data for Dravet syndrome [1][2] Group 1: Azetukalner Efficacy and Safety - The interim data from the X-TOLE study showed a monthly seizure frequency reduction of over 90% at 48 months, with a 100% reduction in patients on 1-2 anti-seizure medications (ASMs) at baseline [2][4] - Among participants treated for 48 months, 38.2% achieved at least 12 months of seizure freedom, while 10.7% maintained seizure freedom for 48 months [4] - The long-term safety profile of azetukalner was consistent with that observed during the double-blind period, indicating a favorable tolerability [5] Group 2: Real-World Studies on Depression in Epilepsy - A study found that 80.6% of patients with focal seizures reported depressed mood, highlighting the significant mental health burden among this population [7] - Newly diagnosed epilepsy patients with depression had a higher prevalence of comorbidities and an increased risk of treatment failure, emphasizing the need for tailored treatment strategies [8] - Patients with moderate to severe depression symptoms experienced a lower quality of life and higher healthcare resource utilization, reinforcing the necessity for routine depression screening in epilepsy care [9] Group 3: Pipeline and Future Directions - Xenon is preparing to share Phase 3 data from the X-TOLE2 study in early 2026, which is anticipated to be a significant milestone for the company and the epilepsy community [2] - The company is also advancing early-stage programs targeting potassium and sodium channels for potential pain treatment, indicating a broadening of its therapeutic focus [15]