SERENITY At-Home Trial Overview - The SERENITY At-Home trial evaluated the safety and tolerability of BXCL501 (120 mcg) for agitation associated with bipolar disorder or schizophrenia in the at-home setting[2, 27, 28] - The trial design was a double-blind, placebo-controlled study with a 1:1 randomization to BXCL501 (N=100) or placebo (N=100) over a 12-week period[27] - The study included patients aged 18-75 years with bipolar I or II disorder, schizophrenia, schizoaffective, or schizophreniform disorder on a stable psychotropic regimen[30] Key Results - The trial collected data from 2,628 agitation episodes in 215 patients, with 2,437 episodes treated in 208 patients[21, 22, 36] - 168 (81%) of treated patients completed the full 12-week study, with an average of 117 agitation episodes recorded per treated patient[36] - No drug-related serious adverse events (SAEs), falls, or syncopes were reported in the BXCL501 arm[23, 37] - The adverse event profile was consistent with the approved IGALMI® label and other clinical trials in institutional settings[23, 37] - Somnolence was the most common treatment-emergent adverse event (TEAE) in the BXCL501 group, occurring in 23 (225%) of patients after the first dose and 161 (139%) of all doses[38] Clinical Benefit - BXCL501 demonstrated a significant mean reduction in mCGI-S score from baseline compared to placebo at 2 hours across 2,433 treated episodes (P<005)[41] - Complete resolution of agitation was significantly higher with BXCL501 compared to placebo across agitation episode severity (P<0001)[41] - For fully resolved episodes by baseline severity, BXCL501 showed higher percentages than placebo across mild, moderate, and severe agitation episodes[43] Next Steps - BioXcel Therapeutics plans to prepare and submit an sNDA (supplemental New Drug Application) in Q1 2026 for label expansion of IGALMI®[12, 23]

® BioXcel Therapeutics | 555 Long Wharf Drive, 12th Floor | New Haven, CT 06511 | www.bioxceltherapeutics.com Agitation Associated with Bipolar Disorders or Schizophrenia in the At-Home Setting SERENITY At-Home Pivotal Phase 3 Safety Trial Topline Results August 27, 2025 Nasdaq: BTAI Forward-Looking Statements This presentation includes "forward-looking statements" within the meaning of the Private Securities Litigation Reform Act of 1995. We intend such forward-looking statements to be covered by the safe ...

Core Insights - BioXcel Therapeutics, Inc. received a second positive recommendation from an independent Data Safety Monitoring Board (DSMB) to continue the SERENITY At-Home pivotal Phase 3 safety trial of BXCL501 for the acute treatment of agitation associated with bipolar disorders or schizophrenia [1][2] - The trial is fully enrolled with 178 patients dosed as of the May 28, 2025 cutoff date, and topline data is expected in Q3 2025 [2][7] - BXCL501 is an investigational sublingual film formulation of dexmedetomidine, currently under investigation for treating agitation in various conditions, including Alzheimer's dementia and bipolar disorders [5][6] Company Overview - BioXcel Therapeutics utilizes artificial intelligence to develop transformative medicines in neuroscience and has a subsidiary focused on immuno-oncology [13] - The company aims to address a significant unmet medical need for patients experiencing agitation related to bipolar disorders and schizophrenia, with no FDA-approved therapies currently available for at-home treatment [3][5] Trial Details - The SERENITY At-Home Phase 3 trial is a double-blind, placebo-controlled study designed to evaluate the safety of a 120 mcg dose of BXCL501 in 200 patients [6] - Patients are self-administering the drug during agitation episodes over a 12-week period, with safety data collected throughout the trial [6][3] - The trial's exploratory endpoints include assessments of severity and change in agitation two hours post-dosing [6] Regulatory and Market Potential - The trial data is intended to support a potential supplemental New Drug Application (sNDA) submission to expand the IGALMI® label for at-home use [3][16] - BXCL501 has received Breakthrough Therapy designation for treating agitation associated with dementia and Fast Track designation for agitation related to schizophrenia and bipolar disorders [5]

Core Insights - BioXcel Therapeutics is progressing with its SERENITY At-Home trial, which is pivotal for evaluating the safety of BXCL501 in treating agitation associated with bipolar disorders or schizophrenia in a home setting [1][2][4] - The trial aims to enroll 200 patients and has reached 33% enrollment, with topline data expected in the second half of 2025 to support a potential supplemental new drug application (sNDA) for IGALMI® [1][3][4] Company Overview - BioXcel Therapeutics, Inc. is a biopharmaceutical company focused on developing transformative medicines in neuroscience using artificial intelligence [13] - The company’s investigational product, BXCL501, is an orally dissolving film formulation of dexmedetomidine, currently under investigation for various indications including agitation associated with Alzheimer's dementia and bipolar disorders [12][13] Trial Details - The SERENITY At-Home trial is a double-blind, placebo-controlled study assessing the safety of a 120 mcg dose of BXCL501 for acute treatment of agitation [4] - The trial is designed for patients with a history of agitation episodes, allowing them to self-administer the treatment during episodes over a 12-week period [4] Market Context - There are an estimated 23 million annual episodes of agitation associated with bipolar disorders or schizophrenia occurring in the home setting in the U.S., with no FDA-approved therapies currently available for acute treatment in this context [3][4] - The SERENITY At-Home trial represents a significant opportunity for BioXcel to address an unmet medical need in the treatment of agitation [3]

Core Insights - The FDA has concluded the inspection of a site involved in the TRANQUILITY II Phase 3 trial of BXCL501, indicating "Voluntary Action Indicated," which supports the reliability of the trial data [1][2] - BioXcel Therapeutics is advancing its TRANQUILITY In-Care Phase 3 trial for BXCL501, having received FDA feedback on the trial protocol [2] Company Overview - BioXcel Therapeutics, Inc. is a biopharmaceutical company focused on developing transformative medicines in neuroscience using artificial intelligence [5] - The company has a subsidiary, OnkosXcel Therapeutics, which is dedicated to immuno-oncology [5] Product Information - BXCL501 is an investigational orally dissolving film formulation of dexmedetomidine, currently approved as IGALMI® for specific indications [3] - BXCL501 is being investigated for the acute treatment of agitation associated with Alzheimer's dementia and bipolar disorders, with Breakthrough Therapy and Fast Track designations from the FDA [3] Trial Details - The TRANQUILITY In-Care trial is a double-blind, placebo-controlled study evaluating the efficacy and safety of a 60 mcg dose of BXCL501 over 12 weeks for agitation in Alzheimer's dementia patients [4] - The trial aims to enroll approximately 150 patients aged 55 and older residing in care facilities, with the primary endpoint being a change in the Positive and Negative Syndrome Scale-Excitatory Component total score [4]