A Study to Evaluate the Efficacy and Safety of KarXT in Acutely Psychotic Japanese Adult Participants With Schizophrenia
A Phase 3, Randomized, Two-part Study With a 5-week Double-blind Part (Randomized, Parallelgroup, Placebo-controlled) Followed by a 52-week Open-label Extension Part to Evaluate the Efficacy and Safety of KarXT in Acutely Psychotic Japanese Adult Patients With Diagnostic and Statistical Manual of Mental Disorders-Fifth Edition (DSM-5) Schizophrenia
1 other identifier
interventional
250
1 country
56
Brief Summary
The purpose of this study is to evaluate the efficacy and safety of KarXT in acutely psychotic Japanese adult participants with schizophrenia
Trial Health
Trial Health Score
Automated assessment based on enrollment pace, timeline, and geographic reach
participants targeted
Target at P25-P50 for phase_3 schizophrenia
Started Jun 2025
Longer than P75 for phase_3 schizophrenia
56 active sites
Health score is calculated from publicly available data and should be used for screening purposes only.
Trial Relationships
Click on a node to explore related trials.
Study Timeline
Key milestones and dates
First Submitted
Initial submission to the registry
March 17, 2025
CompletedFirst Posted
Study publicly available on registry
March 19, 2025
CompletedStudy Start
First participant enrolled
June 10, 2025
CompletedPrimary Completion
Last participant's last visit for primary outcome
September 23, 2028
ExpectedStudy Completion
Last participant's last visit for all outcomes
August 23, 2029
May 13, 2026
May 1, 2026
3.3 years
March 17, 2025
May 12, 2026
Conditions
Outcome Measures
Primary Outcomes (2)
Change from baseline in Positive and Negative Syndrome Scale (PANSS) total score
Double-Blind Part
At week 5
Number of participants with treatment-emergent adverse events (TEAEs)
Open-label extension (OLE) Part
At Week 52 from OLE baseline
Secondary Outcomes (33)
Change from baseline in PANSS positive score
At week 5
Change from baseline in PANSS negative score
At week 5
Change from baseline in PANSS Negative Marder Factor score
At week 5
Change from baseline in Clinical Global Impressions-Severity (CGI-S) score
At week 5
The percentage of PANSS responders (a ≥ 30% change in PANSS total score)
At week 5
- +28 more secondary outcomes
Study Arms (2)
Administration of KarXT
ACTIVE COMPARATORPlacebo
PLACEBO COMPARATORInterventions
Eligibility Criteria
You may qualify if:
- Participants must have a primary diagnosis of schizophrenia established by a comprehensive psychiatric evaluation based on the Diagnostic and Statistical Manual of Mental Disorders⎯Fifth Edition (DSM-5) criteria and confirmed by Mini International Neuropsychiatric Interview (MINI).
- Participants must have a PANSS total score between 80 and 120, inclusive.
- Participants must have a CGI-S score of ≥ 4.
You may not qualify if:
- Participants must not have any primary DSM-5 disorder other than schizophrenia within 12 months before screening.
- Participants must not be newly diagnosed or experiencing their first treated episode of schizophrenia.
- Participants must not have any history or presence of clinically significant medical conditions.
Contact the study team to confirm eligibility.
Sponsors & Collaborators
Study Sites (56)
Hotei Hospital
Kōnan, Aichi-ken, 4838248, Japan
Local Institution - 0056
Nagoya, Aichi-ken, 466-8560, Japan
Okehazama Hospital
Toyoake, Aichi-ken, 470-1168, Japan
Fujita Health University
Toyoake, Aichi-ken, 470-1192, Japan
National Kohnodai Medical Center.
Ichikawa, Chiba, 272-8516, Japan
National Hospital Organization Shimofusa Psychiatric Medical Center
MIdori-ku, Chiba-shi, Chiba, 266-0007, Japan
Local Institution - 0032
Iizuka, Fukuoka, 820-0014, Japan
Local Institution - 0037
Kitakyushu, Fukuoka, 803-0831, Japan
Shiranui Hospital
Omuta, Fukuoka, 836-0004, Japan
Takeda General Hospital - Aizuwakamatsu
Aizu-Wakamatsu, Fukushima, 965-0876, Japan
Local Institution - 0044
Toki, Gifu, 509-5142, Japan
Kure Medical Center
Kure, Hiroshima, 737-0023, Japan
Goryokai Medical Corporation - Goryokai Hospital
Sapporo, Hokkaido, 002-8029, Japan
Hokkaido University Hospital
Sapporo, Hokkaido, 0608648, Japan
Local Institution - 0025
Hadano-shi, Kanagawa, 257-0003, Japan
Fujimidai Hospital
Hiratsuka, Kanagawa, 259-1205, Japan
Kitasato University Hospital
Sagamihara, Kanagawa, 252-0375, Japan
Tsurumi Nishii Hospital
Yokohama, Kanagawa, 230-0074, Japan
Yokohama City University Medical Center
Yokohama, Kanagawa, 232-0024, Japan
Hino Hospital - Yokohama
Yokohama, Kanagawa, 234-0051, Japan
Yuge Hospital
Kumamoto, Kumamoto, 861-8002, Japan
Local Institution - 0019
Yatsushiro, Kumamoto, 866-0043, Japan
National Hospital Organization Maizuru Medical Center
Maizuru, Kyoto, 625-8502, Japan
Miyakonojo Shinsei Hospital
Miyakonojō, Miyazaki, 885-0093, Japan
Local Institution - 0014
Komoro, Nagano, 384-8540, Japan
Local Institution - 0050
Matsumoto, Nagano, 390-0847, Japan
University of the Ryukyus Hospital
Ginowan, Okinawa, 901-2725, Japan
Osaka Psychiatric Medical Center
Hirakata, Osaka, 573-0022, Japan
Kansai Medical University Medical Center
Moriguchi, Osaka, 570-8507, Japan
Nagaokai Medical Corporation - Neyagawa Sanatorium
Neyagawa, Osaka, 572-0854, Japan
Shin-Abuyama Hospital
Takatsuki, Osaka, 569-1041, Japan
Osaka Medical and Pharmaceutical University Hospital
Takatsuki, Osaka, 569-8686, Japan
Rainbow and Sea Hospital
Karatsu-shi, Saga-ken, 847-0031, Japan
Inuo Hospital
Tosu, Saga-ken, 841-0081, Japan
Saitama Konan Hospital
Kumagaya, Saitama, 360-0114, Japan
Dokkyo Medical University Hospital
Shimotsuga, Tochigi, 321-0293, Japan
Local Institution - 0054
Shimotsuke, Tochigi, 329-0498, Japan
Local Institution - 0043
Utsunomiya, Tochigi, 329-1104, Japan
Local Institution - 0012
Hachiōji, Tokyo, 192-0153, Japan
National Center of Neurology and Psychiatry
Kodaira, Tokyo, 187-8551, Japan
Asuka Hospital
Machida, Tokyo, 1940005, Japan
Toho University Omori Medical Center
Ōta-ku, Tokyo, 143-8541, Japan
Tokyo Metropolitan Matsuzawa Hospital
Setagaya City, Tokyo, 1560057, Japan
Narimasu Kosei Hospital
tabashi City, Tokyo, 175-0091, Japan
Yamaguchi University Hospital
Ube, Yamaguchi, 755-8505, Japan
Kuramitsu Hospital
Fukuoka, 819-0037, Japan
University Hospital,Kyoto Prefectural University of Medicine
Kyoto, 602-8566, Japan
Miyazaki Prefectural Miyazaki Hospital
Miyazaki, 880-8510, Japan
Okayama University Hospital
Okayama, 700-8558, Japan
Local Institution - 0018
Okinawa, 904-0012, Japan
Local Institution - 0031
Osaka, 590-0018, Japan
Saitama Neuropsychitric Institute
Saitama, 338-8577, Japan
Local Institution - 0039
Tokushima, 770-8503, Japan
Local Institution - 0033
Tottori, 689-0203, Japan
Wakayama Medical University Hospital
Wakayama, 641-8510, Japan
Yamagata Sakuracho Hospital
Yamagata, 990-0045, Japan
Related Links
MeSH Terms
Conditions
Condition Hierarchy (Ancestors)
Study Officials
- STUDY DIRECTOR
Bristol-Myers Squibb
Bristol-Myers Squibb
Central Study Contacts
BMS Clinical Trials Contact Center www.BMSClinicalTrials.com
CONTACT
First line of the email MUST contain NCT # and Site #.
CONTACT
Study Design
- Study Type
- interventional
- Phase
- phase 3
- Allocation
- RANDOMIZED
- Masking
- DOUBLE
- Who Masked
- PARTICIPANT, INVESTIGATOR
- Purpose
- TREATMENT
- Intervention Model
- PARALLEL
- Sponsor Type
- INDUSTRY
- Responsible Party
- SPONSOR
Study Record Dates
First Submitted
March 17, 2025
First Posted
March 19, 2025
Study Start
June 10, 2025
Primary Completion (Estimated)
September 23, 2028
Study Completion (Estimated)
August 23, 2029
Last Updated
May 13, 2026
Record last verified: 2026-05
Data Sharing
- IPD Sharing
- Will share
- Shared Documents
- STUDY PROTOCOL, SAP, CSR
- Time Frame
- See Plan Description
- Access Criteria
- See Plan Description
BMS will provide access to individual anonymized participant data upon request from qualified researchers, and subject to certain criteria. Additional information regarding Bristol Myer Squibb's data sharing policy and process can be found at https://www.bms.com/researchers-and-partners/clinical-trials-and-research.html