BioXcel Therapeutics Reports Positive Topline Exploratory Efficacy Data from SERENITY At-Home Pivotal Phase 3 Safety Trial for Agitation Associated with Bipolar Disorders or Schizophrenia

Core Insights - BioXcel Therapeutics announced positive topline exploratory efficacy data from the SERENITY At-Home Pivotal Phase 3 safety trial for BXCL501, indicating significant benefits in treating agitation associated with bipolar disorders and schizophrenia [1][3][5] Efficacy Results - BXCL501 demonstrated a significant mean reduction in the modified Clinical Global Impression–Severity (mCGI-S) score from baseline compared to placebo at 2 hours across 2,433 treated episodes (p<.05) [6] - Complete resolution of agitation symptoms was significantly higher with BXCL501 compared to placebo, with an overall resolution of 50% in the BXCL501 arm versus 33% on placebo (p <.0001) [7] - The mean reduction in mCGI-S score was maintained across repeated dosing, with a mean reduction of 1.2 after the first 12 doses and 1.4 after 13 or more doses [8] - The reduction in agitation symptoms was consistent throughout the 12-week trial duration, with a mean reduction of 1.3 in mCGI-S scores across all weeks [9] Trial Design and Patient Insights - The SERENITY At-Home trial was a double-blind, placebo-controlled study involving 246 patients, with data collected on 2,628 agitation episodes over 12 weeks [4][16] - The trial included patients with bipolar disorders (45%) and schizophrenia (55%), allowing for concomitant interventions to manage agitation episodes [4] - Patients reported an average of 11.7 agitation episodes during the trial, with 81% completing the full 12-week study [4] Market Opportunity - The total addressable market for at-home agitation treatment is estimated to be significantly higher than previously anticipated, with 57-77 million agitation episodes annually compared to an earlier estimate of 23 million [12] - The lack of FDA-approved therapies for at-home agitation treatment highlights a substantial unmet need in the market [11][12] Future Plans - Based on the positive trial results and FDA feedback, the company plans to submit a supplemental New Drug Application (sNDA) in Q1 2026 for expanded usage of IGALMI® in outpatient settings [1][2][10]