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BioXcel Therapeutics Announces Publication in Frontiers in Pharmacology on the Effects of Dexmedetomidine (the active ingredient in BXCL-501) on Stress-Mediated Behaviors in Non-clinical Studies

1. BXCL501 shows promise for chronic psychiatric disorders. 2. Recent study highlights dexmedetomidine's effectiveness against stress-related behaviors. 3. Clinical studies underway for multiple stress-related conditions using BXCL501. 4. IGALMI® (BXCL501) approved for acute agitation in bipolar disorder and schizophrenia. 5. Study findings support potential daily dosing and safety for patients.

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Why Bullish?

Discovery of chronic treatment possibilities could expand BXCL501's market, enhancing revenue potential. Historical examples like Eli Lilly's Cymbalta for chronic pain showed similar effects.

How important is it?

The expansion of BXCL501's indication hints at a larger share of the psychiatric drug market, suggesting strong potential for future growth in BTAI’s profitability and stock price.

Why Long Term?

Positive clinical outcomes will likely take time to translate into market traction and sales. Approval timelines for new indications further prolong the horizon for impact.

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August 06, 2025 07:00 ET  | Source: BioXcel Therapeutics Dexmedetomidine demonstrated a significant reduction in stress-induced behaviors, suggesting potential applications of BXCL501 in chronic psychiatric disorders in addition to treatment of acute agitation Leading academic institutions are evaluating BXCL-501 in clinical studies for multiple chronic conditions NEW HAVEN, Conn., Aug. 06, 2025 (GLOBE NEWSWIRE) -- BioXcel Therapeutics, Inc. (Nasdaq: BTAI), a biopharmaceutical company utilizing artificial intelligence to develop transformative medicines in neuroscience, today announced a publication in the peer-reviewed journal Frontiers in Pharmacology, entitled “Dexmedetomidine potently and reversibly regulates stress-mediated behaviors.” The study demonstrated a significant effect in translatable behavioral models related to psychiatric disorders suggesting potential applications of BXCL501 in chronic conditions in addition to treatment of acute agitation. BXCL501 has already been clinically validated and FDA approved (as IGALMI™) for treatment of acute episodes of agitation associated with bipolar disorder or schizophrenia. Dexmedetomidine, an alpha2-adrenergic receptor agonist, is the active ingredient in BXCL501. The published results provide further support for the drug’s mechanism of action and potential suitability for broadly addressing stress-related disorders in addition to agitation. Studies underway at leading academic institutions are investigating the potential of daily dosing of BXCL501 in treating a number of stress-related disorders, including opioid withdrawal, acute stress disorder, and alcohol use disorder in patients with PTSD. “The promising results presented in this study suggest that dexmedetomidine reduces agitation through potent, selective agonist action at central alpha-2 adrenergic receptors, providing an additional underlying scientific rationale for the safety and efficacy established by our current clinical programs, as well as indicating a potential as a treatment for chronic stress-induced behaviors,” said Frank Yocca, Ph.D., CSO of BioXcel Therapeutics. “The study shows that dexmedetomidine does not impair motor skills at effective doses and has favorable effects on sleep, suggesting potential additional benefits for psychiatric and neurological patients.” Key findings from the non-clinical studies include: Dexmedetomidine exhibited higher in vitro potency and activity than other alpha2-adrenergic receptor agonists (clonidine, lofexidine or guanfacine).Dexmedetomidine significantly mitigated responses to both acute and repeated stress after both acute and repeated dosing.Effects of dexmedetomidine were consistent across multiple models of stress.Dexmedetomidine exhibited favorable attributes for potential daily administration, including no loss of effect after repeat doses, and no withdrawal effects after stopping dosing.Dexmedetomidine at efficacious doses did not affect motor function or cognition compared with diazepam or scopolamine, respectively.Dexmedetomidine had a favorable effect on sleep patterns. About BXCL501Outside of its approved indication by the U.S. Food and Drug Administration as IGALMI® (dexmedetomidine) sublingual film, BXCL501 is an investigational proprietary, orally dissolving film formulation of dexmedetomidine, a selective alpha-2 adrenergic receptor agonist. BXCL501 is under investigation by BioXcel Therapeutics for the acute treatment of agitation associated with Alzheimer’s dementia and for the acute treatment of agitation associated with bipolar I or II disorder or schizophrenia in the at-home setting. The safety and efficacy of BXCL501 for these investigational uses have not been established. BXCL501 has been granted Breakthrough Therapy designation by the FDA for the acute treatment of agitation associated with dementia and Fast Track designation for the acute treatment of agitation associated with schizophrenia, bipolar disorders, and dementia. About the SERENITY At-Home Phase 3 TrialThe 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 for the acute treatment of agitation associated with bipolar disorders or schizophrenia in the at-home setting. The trial is designed to evaluate 200 patients with a history of agitation episodes residing at home either alone or with caregivers/informants. Patients are self-administering 120 mcg of BXCL501 or placebo when agitation episodes occur over the 12-week trial period, with safety data (adverse events) collected during the trial. In addition, patients or caregivers/informants will complete a modified global impression of severity (mCGIs) and a clinical global impression of change (mCGI-C) two hours after dosing as an exploratory endpoint to evaluate use in the outpatient setting. About IGALMI® (dexmedetomidine) sublingual film    INDICATION  IGALMI® (dexmedetomidine) sublingual film is a prescription medicine, administered under the supervision of a health care provider, that is placed under the tongue or behind the lower lip and is used for the acute treatment of agitation associated with schizophrenia and bipolar disorder I or II in adults. The safety and effectiveness of IGALMI has not been studied beyond 24 hours from the first dose. It is not known if IGALMI is safe and effective in children.  IMPORTANT SAFETY INFORMATION  IGALMI can cause serious side effects, including:  Decreased blood pressure, low blood pressure upon standing, and slower than normal heart rate, which may be more likely in patients with low blood volume, diabetes, chronic high blood pressure, and older patients. IGALMI is taken under the supervision of a healthcare provider who will monitor vital signs (like blood pressure and heart rate) and alertness after IGALMI is administered to help prevent falling or fainting. Patients should be adequately hydrated and sit or lie down after taking IGALMI and instructed to tell their healthcare provider if they feel dizzy, lightheaded, or faint. Heart rhythm changes (QT interval prolongation). IGALMI should not be given to patients with an abnormal heart rhythm, a history of an irregular heartbeat, slow heart rate, low potassium, low magnesium, or taking other drugs that could affect heart rhythm. Taking IGALMI with a history of abnormal heart rhythm can increase the risk of torsades de pointes and sudden death. Patients should be instructed to tell their healthcare provider immediately if they feel faint or have heart palpitations. Sleepiness/drowsiness. Patients should not perform activities requiring mental alertness, such as driving or operating hazardous machinery, for at least 8 hours after taking IGALMI. Withdrawal reactions, tolerance, and decreased response/efficacy. IGALMI was not studied for longer than 24 hours after the first dose. Physical dependence, withdrawal symptoms (e.g., nausea, vomiting, agitation), and decreased response to IGALMI may occur if IGALMI is used longer than 24 hours.  The most common side effects of IGALMI in clinical studies were sleepiness or drowsiness, a prickling or tingling sensation or numbness of the mouth, dizziness, dry mouth, low blood pressure, and low blood pressure upon standing.  These are not all the possible side effects of IGALMI. Patients should speak with their healthcare provider for medical advice about side effects.  Patients should tell their healthcare provider about their medical history, including if they suffer from any known heart problems, low potassium, low magnesium, low blood pressure, low heart rate, diabetes, high blood pressure, history of fainting, or liver impairment. They should also tell their healthcare provider if they are pregnant or breastfeeding or take any medicines, including prescription and over-the-counter medicines, vitamins, and herbal supplements. Patients should especially tell their healthcare provider if they take any drugs that lower blood pressure, change heart rate, or take anesthetics, sedatives, hypnotics, and opioids.  Everyone is encouraged to report negative side effects of prescription drugs to the FDA. Visit www.fda.gov/medwatch or call 1-800-FDA-1088. You can also contact BioXcel Therapeutics, Inc. at 1-833-201-1088 or medinfo@bioxceltherapeutics.com.  Please see full prescribing information at Igalmi.com. About BioXcel Therapeutics, Inc.BioXcel Therapeutics, Inc. (Nasdaq: BTAI) is a biopharmaceutical company utilizing artificial intelligence to develop transformative medicines in neuroscience. Its wholly owned subsidiary, OnkosXcel Therapeutics, is focused on the development of medicines in immuno-oncology. The Company’s drug re-innovation approach leverages existing approved drugs and/or clinically validated product candidates together with big data and proprietary machine learning algorithms to identify new therapeutic indications. For more information, please visit bioxceltherapeutics.com. Forward-Looking StatementsThis press release 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 harbor provisions for forward-looking statements contained in Section 27A of the Securities Act of 1933, as amended and Section 21E of the Securities Exchange Act of 1934, as amended. All statements contained in this press release other than statements of historical fact should be considered forward-looking statements, including, without limitation, statements related to: the Company’s planned advancement of its SERENITY trial; potential market opportunity for BXCL501; completing enrollment and release of topline data from the ongoing SERENITY trial; submission of an sNDA; the potential for the results from the Company’s completed, ongoing and proposed clinical trials to support regulatory approvals for its product candidates. When used herein, words including “anticipate,” “believe,” “can,” “continue,” “could,” “designed,” “estimate,” “expect,” “forecast,” “goal,” “intend,” “may,” “might,” “plan,” “possible,” “potential,” “predict,” “project,” “should,” “target,” “will,” “would” and similar expressions are intended to identify forward-looking statements, though not all forward-looking statements use these words or expressions. In addition, any statements or information that refer to expectations, beliefs, plans, projections, objectives, performance or other characterizations of future events or circumstances, including any underlying assumptions, are forward-looking. All forward-looking statements are based upon the Company’s current expectations and various assumptions. The Company believes there is a reasonable basis for its expectations and beliefs, but they are inherently uncertain. The Company may not realize its expectations, and its beliefs may not prove correct. Actual results could differ materially from those described or implied by such forward-looking statements as a result of various important factors, including, without limitation: its limited operating history; its incurrence of significant losses; its need for substantial additional funding and ability to raise capital when needed; the impact of the reprioritization; its significant indebtedness, ability to comply with covenant obligations and potential payment obligations related to such indebtedness and other contractual obligations; the Company has identified conditions and events that raise substantial doubt about its ability to continue as a going concern; its limited experience in drug discovery and drug development; risks related to the TRANQUILITY program; its dependence on the success and commercialization of IGALMI®, BXCL501, BXCL502, BXCL701 and BXCL702 and other product candidates; the number of episodes of agitation and the size of the Company’s total addressable market may be overestimated, and approval that the Company may obtain may be based on a narrower definition of the patient population; its lack of experience in marketing and selling drug products; the risk that IGALMI or the Company’s product candidates may not be accepted by physicians or the medical community in general; the Company still faces extensive and ongoing regulatory requirements and obligations for IGALMI; the failure of preliminary data from its clinical studies to predict final study results; failure of its early clinical studies or preclinical studies to predict future clinical studies; its ability to receive regulatory approval for its product candidates; its ability to enroll patients in its clinical trials; undesirable side effects caused by the Company’s product candidates; its novel approach to the discovery and development of product candidates based on EvolverAI; the significant influence of and dependence on BioXcel LLC; its exposure to patent infringement lawsuits; its reliance on third parties; its ability to comply with the extensive regulations applicable to it; impacts from data breaches or cyber-attacks, if any; risks associated with the increased scrutiny relating to environmental, social and governance (ESG) matters; risks associated with federal, state or foreign health care “fraud and abuse” laws; and its ability to commercialize its product candidates, as well as the important factors discussed under the caption “Risk Factors” in its Annual Report on Form 10-K for the fiscal year ended December 31, 2024, as such factors may be updated from time to time in its other filings with the SEC, which are accessible on the SEC’s website at www.sec.gov and the Investors section of the Company’s website at www.bioxceltherapeutics.com. These and other important factors could cause actual results to differ materially from those indicated by the forward-looking statements made in this press release. Any such forward-looking statements represent management’s estimates as of the date of this press release. While the Company may elect to update such forward-looking statements at some point in the future, except as required by law, it disclaims any obligation to do so, even if subsequent events cause our views to change. These forward-looking statements should not be relied upon as representing the Company’s views as of any date subsequent to the date of this press release. Contact Information Corporate/InvestorsRusso PartnersNic Johnsonnic.johnson@russopartnersllc.com 1.303.482.6405 MediaRusso PartnersDavid Schulldavid.schull@russopartnersllc.com 1.858.717.2310 Source: BioXcel Therapeutics, Inc.IGALMI® is a registered trademark of BioXcel Therapeutics, Inc.

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