Clinical trial Recruiting at 46 sites Phase 3 Interventional Ages 18 to 65

KarXT for acute psychosis in Japanese adults with schizophrenia

Official title: 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

Run by Bristol-Myers Squibb · NCT06882785 · Data updated 2026-11-12

This trial will test whether KarXT can reduce acute psychotic symptoms in Japanese adults with schizophrenia compared with placebo.

More Schizophrenia trials

Quick facts

PhasePhase 3
Study typeInterventional
Ages18 Years to 65 Years
SexAll
Enrollment250 (estimated)
SponsorBristol-Myers Squibb
Industry-sponsored
Locations56 sites (Kōnan, Aichi-ken and 55 other locations)
StatusRecruiting
StartedJune 10, 2025
Main results expectedSeptember 23, 2028
Study endsAugust 23, 2029
Registry record updatedNovember 2, 2026
Trial IDNCT06882785 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Japanese adults with confirmed DSM-5 schizophrenia who are currently acutely psychotic (PANSS 80–120 and CGI-S ≥4) and meet the study's medical eligibility criteria are ideal candidates.

Probably not a fit

People with other primary psychiatric disorders within the prior year, first-episode or newly diagnosed schizophrenia, significant medical comorbidities, or those outside the required PANSS/CGI-S ranges are unlikely to qualify or benefit from this study.

A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.

What this trial studies

This Phase 3, interventional trial enrolls acutely psychotic Japanese adults with a DSM-5 diagnosis of schizophrenia and specified symptom severity. Participants are randomized to receive either KarXT or placebo and are monitored for changes in psychotic symptoms and safety outcomes. Eligibility requires PANSS total scores between 80 and 120 and a CGI-S score of ≥4, with other medical and psychiatric criteria applied. The study is conducted at multiple sites in Aichi prefecture, Japan.

Why it matters

Potential benefit: If successful, KarXT could offer a new antipsychotic option that reduces acute psychotic symptoms and may have a different side-effect profile from existing treatments.

How similar studies have gone: Earlier phase 2 studies of KarXT reported promising reductions in psychotic symptoms with a manageable tolerability profile, but larger phase 3 data are needed for confirmation.

Who can join: the full rules

Show full inclusion / exclusion criteria
Inclusion Criteria

* 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.

Exclusion Criteria

* 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.
* Other protocol-defined Inclusion/Exclusion criteria apply.

Where it's running

  • Hotei Hospital
    Kōnan, Aichi-ken, Japan
    Recruiting
  • Nagoya University Hospital
    Nagoya, Aichi-ken, Japan
    Recruiting
  • Okehazama Hospital
    Toyoake, Aichi-ken, Japan
    Recruiting
  • Fujita Health University
    Toyoake, Aichi-ken, Japan
    Recruiting
  • National Kohnodai Medical Center.
    Ichikawa, Chiba, Japan
    Recruiting
  • Shiranui Hospital
    Omuta, Fukuoka, Japan
    Recruiting
Show 44 more locations
  • Takeda General Hospital - Aizuwakamatsu
    Aizu-Wakamatsu, Fukushima, Japan
    Recruiting
  • Holy Cross Hospital - Toki
    Toki, Gifu, Japan
    Recruiting
  • Kure Medical Center
    Kure, Hiroshima, Japan
    Recruiting
  • Goryokai Medical Corporation - Goryokai Hospital
    Sapporo, Hokkaido, Japan
    Recruiting
  • Hokkaido University Hospital
    Sapporo, Hokkaido, Japan
    Recruiting
  • Fujimidai Hospital
    Hiratsuka, Kanagawa, Japan
    Recruiting
  • Kitasato University Hospital
    Sagamihara, Kanagawa, Japan
    Recruiting
  • Tsurumi Nishii Hospital
    Yokohama, Kanagawa, Japan
    Recruiting
  • Yokohama City University Medical Center
    Yokohama, Kanagawa, Japan
    Recruiting
  • Hino Hospital - Yokohama
    Yokohama, Kanagawa, Japan
    Recruiting
  • Yuge Hospital
    Kumamoto, Kumamoto, Japan
    Recruiting
  • National Hospital Organization Maizuru Medical Center
    Maizuru, Kyoto, Japan
    Recruiting
  • Miyakonojo Shinsei Hospital
    Miyakonojō, Miyazaki, Japan
    Recruiting
  • University of the Ryukyus Hospital
    Ginowan, Okinawa, Japan
    Recruiting
  • Osaka Psychiatric Medical Center
    Hirakata, Osaka, Japan
    Recruiting
  • Kansai Medical University Medical Center
    Moriguchi, Osaka, Japan
    Recruiting
  • Nagaokai Medical Corporation - Neyagawa Sanatorium
    Neyagawa, Osaka, Japan
    Recruiting
  • Shin-Abuyama Hospital
    Takatsuki, Osaka, Japan
    Recruiting
  • Osaka Medical and Pharmaceutical University Hospital
    Takatsuki, Osaka, Japan
    Recruiting
  • Rainbow and Sea Hospital
    Karatsu-shi, Saga-ken, Japan
    Recruiting
  • Inuo Hospital
    Tosu, Saga-ken, Japan
    Recruiting
  • Saitama Konan Hospital
    Kumagaya, Saitama, Japan
    Recruiting
  • Dokkyo Medical University Hospital
    Shimotsuga, Tochigi, Japan
    Recruiting
  • Tochigi Prefectural Okamotodai Hospital
    Utsunomiya, Tochigi, Japan
    Recruiting
  • National Center of Neurology and Psychiatry
    Kodaira, Tokyo, Japan
    Recruiting
  • Asuka Hospital
    Machida, Tokyo, Japan
    Recruiting
  • Toho University Omori Medical Center
    Ōta-ku, Tokyo, Japan
    Recruiting
  • Tokyo Metropolitan Matsuzawa Hospital
    Setagaya City, Tokyo, Japan
    Recruiting
  • Narimasu Kosei Hospital
    tabashi City, Tokyo, Japan
    Recruiting
  • Yamaguchi University Hospital
    Ube, Yamaguchi, Japan
    Recruiting
  • National Hospital Organization Shimofusa Psychiatric Medical Center
    Chiba, Japan
    Recruiting
  • Kuramitsu Hospital
    Fukuoka, Japan
    Recruiting
  • University Hospital,Kyoto Prefectural University of Medicine
    Kyoto, Japan
    Recruiting
  • Miyazaki Prefectural Miyazaki Hospital
    Miyazaki, Japan
    Recruiting
  • Okayama University Hospital
    Okayama, Japan
    Recruiting
  • Asakayama Hospital
    Osaka, Japan
    Recruiting
  • Saitama Neuropsychitric Institute
    Saitama, Japan
    Recruiting
  • Tokushima University Hospital
    Tokushima, Japan
    Recruiting
  • Wakayama Medical University Hospital
    Wakayama, Japan
    Recruiting
  • Yamagata Sakuracho Hospital
    Yamagata, Japan
    Recruiting
  • Local Institution - 0032
    Iizuka, Fukuoka, Japan
    Withdrawn
  • Local Institution - 0037
    Kitakyushu, Fukuoka, Japan
    Not yet recruiting
  • Local Institution - 0025
    Hadano-shi, Kanagawa, Japan
    Not yet recruiting
  • Local Institution - 0019
    Yatsushiro, Kumamoto, Japan
    Withdrawn

+6 more sites. See ClinicalTrials.gov for the full list.

Study contacts

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How to take part

  1. Review the eligibility criteria above with your treating physician.
  2. Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
  3. Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.
Last reviewed 2026-11-14 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.