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BXCL501

Phase 3

Agitation,Psychomotor | Small molecule | Psychiatry |BioXcel Therapeutics, Inc.|Last Updated: Sep 18, 2025

Success Probability
Approval Probability 71%
TA Base Rate26%
Adjusted LOA41%
ML RiskLOW_RISK
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Market & Valuation
rNPV $3.2B
Market Size $9.4B
Revenue Basis $1.6B
Competitors 6
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Trial Design
RandomizedDouble-BlindPLACEBO_CONTROLLEDBiomarker
Total Trials1
Total Enrollment452
FDA Designations
BREAKTHROUGH_THERAPYFAST_TRACK
Clinical Trials (1)
NCT IDTitlePhaseStatusEnrollmentVelocityDesignStartCompletionLast UpdatedSitesCountries
NCT05658510Dexmedetomidine in the Treatment of Agitation Associated With Schizophrenia and Bipolar Disorder (SERENITY III)PHASE3 COMPLETED 452Nov 21, 2022Aug 15, 2025Sep 18, 202524 United States
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Study Endpoints
Primary Endpoints
Part 1: Change from baseline in Positive and Negative Syndrome Scale - Excited (PEC) total score
2 hours

The Positive and Negative Syndrome Scale - Excited Component (PEC) comprises 5 items associated with agitation: poor impulse control, tension, hostility, uncooperativeness, and excitement; each scored 1 (minimum) to 7 (maximum). The PEC, the sum of these 5 subscales, thus ranges from 5 (absence of agitation) to 35 (extremely severe)

Part 2: The incidence of SAEs and TEAEs compared with placebo.
Through study completion, an average of 12 weeks

To assess the safety of 120 mcg BXCL501 when used in an at-home environment based on serious adverse events (SAE) and treatment emergent adverse events (TEAEs).

Secondary Endpoints
Part 1: Clinical Global Impression - Improvement (CGI-I)
2 hours
Part 1: Change in Modified Clinical Global Impression - Severity (mCGI-S) scores from Baseline
2 hours
Part 1:The number of responders based on the Modified Clinical Global Impression - Severity (mCGI-S) score
2 hours
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Study Design & Arms
AllocationRANDOMIZED
MaskingQUADRUPLE
ModelPARALLEL
PurposeTREATMENT
Treatment Arms
ArmTypeDescription
Part 1: 60 mcg of BXCL501EXPERIMENTALSublingual film containing 60 Micrograms Dexmedetomidine
Part 1: Matching PlaceboPLACEBO_COMPARATORSublingual Placebo film
Part 2: 120 mcg of BXCL501EXPERIMENTALSublingual film containing 120 Micrograms Dexmedetomidine
Part 2: Matching PlaceboPLACEBO_COMPARATORSublingual Placebo film
Interventions
NameTypeDescription
BXCL501DRUGSublingual Film
Matching PlaceboDRUGSublingual Placebo Film
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Eligibility Criteria
Age Range18 Years — 75 Years
SexALL
Healthy VolunteersNo
Study Sites24

A patient may enroll in only one part of the study; either Part 1 or Part 2. Inclusion Criteria: * Male and female patients between the ages of 18 to 75 years, inclusive * Patients who can read, understand and provide written informed consent. * Patients who have met Diagnostic and Statistical Man...

Countries:United States
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