XEN1101 (FOS)

XEN1101, A Differentiated KV7 Potassium Channel Opener for the Treatment of Epilepsy

We are developing XEN1101, a differentiated Kv7 potassium channel opener, for the treatment of epilepsy, major depressive disorder (MDD), and potentially other neurological disorders.

The Kv7 potassium channel mechanism has been clinically validated with ezogabine, an earlier generation Kv7 opener that was approved by the FDA as an adjunctive treatment for adults with focal seizures with or without secondary generalization. XEN1101’s unique composition is chemically designed to improve upon potency, selectivity and pharmacokinetics, or PK, of ezogabine, and is not expected to have ezogabine’s composition-specific tissue pigmentation effects.

Xenon continues to execute on its comprehensive strategy to protect and expand the intellectual property portfolio that covers XEN1101. Importantly, two additional U.S. patents were granted in 2021 with claims related to: (1) compositions-of-matter covering four distinct crystalline forms of XEN1101 drug substance (including the forms used in current and future clinical development); and (2) methods of enhancing the bioavailability of XEN1101 by administration with or close to a meal (consistent with the dosing of XEN1101 in clinical studies). These U.S. patents are expected to expire in 2040 and 2039, respectively, absent any extensions of patent term.