Praxis Scores Phase II Win in Rare Epilepsies as Ulixacaltamide Tracks Toward 2026 FDA Filing
SHERIDAN, WYOMING - December 8, 2025 - Praxis Precision Medicines has doubled down on its neurology strategy with back-to-back updates: a Phase II win for its sodium current blocker relutrigine in rare developmental and epileptic encephalopathies (DEE) and a "successful" pre-NDA meeting for its essential tremor candidate ulixacaltamide, positioning the Boston biotech as a potential new commercial player in both ultra-rare epilepsy and movement disorders.
Relutrigine Study Stopped Early for Efficacy in DEE
Praxis has halted its mid-stage EMBOLD trial of relutrigine early, after an independent data monitoring board recommended the study "stop the study early for efficacy." The Phase II EMBOLD study is evaluating relutrigine in patients with DEE linked to SCN8A and SCN2A mutations, a small but highly underserved genetic epilepsy population with limited therapeutic options and high unmet medical need.