Phase 3 Schizophrenia Trial, Recruiting NCT05325645 Sponsor: Otsuka Pharmaceutical Co., Ltd. Condition: Schizophrenia
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Phase 3 Schizophrenia Trial, Recruiting

NCT05325645
Recruiting Phase 3

Who may be able to join

AI generated eligibility summary. Written by an AI model from the official source data and checked on a sample basis. It can contain mistakes, so confirm anything important against the original source. How we use AI

Who might be able to join this trial:

  • People who are at least 18 years old and under 65 years old at the time of signing the consent form
  • People who have been diagnosed with schizophrenia (specifically, multiple episodes and currently in an acute episode) based on a recognised diagnostic standard, confirmed by a structured interview at the time of consent
  • People who are currently in hospital, or whose doctor has determined they need to be hospitalised, due to an acute relapse of schizophrenia
  • People whose current episode began within 2 months before the screening visit
  • People who were previously treated with antipsychotic medications (not including clozapine) at appropriate doses and were found to respond to that treatment
  • People whose symptoms returned or worsened during a period when they were not taking antipsychotic medication
  • People who have been fully informed about the trial and are able to provide written consent before any trial procedures begin

Who may not be able to join:

  • People experiencing their very first episode of schizophrenia, as determined by the treating doctor
  • People whose schizophrenia has not responded to two or more antipsychotic medications taken at effective doses for at least 6 weeks each (considered treatment-resistant)
  • People who have previously been treated with clozapine for schizophrenia
  • People experiencing significant depressive symptoms in the 30 days before consent that, in the doctor's opinion, require antidepressant treatment
  • People who, in the 6 months before screening or since their last assessment, have reported serious thoughts of suicide with some intention or a specific plan, based on a standard assessment tool
  • People who have shown suicidal behaviour in the 2 years before screening or since their last assessment, based on a standard assessment tool, or who the doctor considers to be at serious risk of suicide
  • People with moderate or severe involuntary movements (tardive dyskinesia), as measured by a standard rating scale at screening or at the start of the trial
  • People with severe restlessness (akathisia), as measured by a standard rating scale at screening or at the start of the trial
  • People who, in the 30 days before screening, were taking two or more antipsychotic medications each at high doses, or were taking antipsychotics at a combined daily dose above a specified high threshold (confirm with trial site for exact dose details)
  • People who have a diagnosis of another mental health condition alongside schizophrenia — such as schizoaffective disorder, major depression, bipolar disorder, anxiety disorder, OCD, PTSD, dementia, or personality disorder — though caffeine- or tobacco-related conditions are not excluded on this basis
  • People who have met the diagnostic criteria for a substance use or addictive disorder (including alcohol or benzodiazepines, but not caffeine or tobacco) within the 180 days before the trial medication is due to start
  • People with a significant medical condition affecting the nervous system, liver, kidneys, metabolism, blood, immune system, heart, lungs, or digestive system (minor or well-controlled conditions may be assessed individually by the trial site)
  • People with a known allergy or intolerance to the study drug brexpiprazole, a confirmed lack of response to brexpiprazole, or who have already received brexpiprazole during their current episode
  • People the treating doctor considers unsuitable for the trial for any other reason

Important: Always verify eligibility with the trial site directly before applying.

Based on publicly available eligibility criteria from ClinicalTrials.gov. Verify directly with the trial site before acting. This is not medical advice.

This is a simplified plain English summary of the eligibility criteria. Full criteria are set by the trial investigators and may include additional requirements not shown here. Never self-exclude from a trial based on this summary. Contact the trial site directly to confirm your eligibility.
Last synced 28 July 2026
Phase 3: approximately ~65% of drugs entering this phase reach regulatory approval, based on published industry-wide historical data. This is not specific to this trial.
Phase success rates shown are historical industry-wide averages based on published data. They are not a prediction for this specific trial or your individual situation.

Contact this trial

Principal Investigator: Takeshi Tsunoda, Otsuka Pharmaceutical Co., Ltd.

Phone: +81-3-6361-7314

Contact details sourced from ClinicalTrials.gov. Verify directly with the trial site before attending.

GP referral letter

Print a one-page summary to share with your doctor.

Trial details

Status
Recruiting
Phase
Phase 3
Sponsor
Otsuka Pharmaceutical Co., Ltd.
Registry
ClinicalTrials.gov
Start date
21 July 2022
Est. completion
1 February 2026

Where this trial is recruiting

🇯🇵 Japan

Primary endpoints

Mean change from baseline in the Positive and Negative Syndrome Scale (PANSS) total score at last visit of the double-blind period

Can't join this trial?

Expanded access pathways

If this trial is not available to you, other access pathways may exist. In Australia, the TGA Special Access Scheme allows access to unapproved therapeutic goods for individual patients.

TGA Special Access Scheme information

Find other recruiting trials on ClinicalTrials.gov

Data last synced from ClinicalTrials.gov: 28 July 2026. Trial status can change. Always verify current status directly with the trial site before making any decision.

Trial recruitment status can change without notice between our nightly data updates. Always contact the trial site directly to confirm current recruitment status before making any decisions or travel arrangements.

View original record on ClinicalTrials.gov