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Phase 3 N=463 Randomized Quadruple-blind Treatment

A Clinical Trial to Study the Efficacy and Safety of an Investigational Drug in Acutely Psychotic People With Schizophrenia

Schizophrenia

Enrolled (actual)
463
Serious AEs
5.8%
Results posted
May 2026
Primary outcome: Primary: Change From Baseline in PANSS Total Score at Week 6 — -19.3; -16.9; -19.6 score on a scale — p=0.886

Study Design & Population

Study type
Interventional
Phase
Phase 3
Interventions
SEP-363856 50mg (Drug); SEP-363856 75mg (Drug); Placebo (Drug)
Age
Pediatric, Adult, Older Adult · 13+ yrs
Sex
All
Sponsor
Otsuka Pharmaceutical Development & Commercialization, Inc.
Primary completion
May 2023

Outcome Measures

OutcomeResultp-value
PRIMARY
Change From Baseline in PANSS Total Score at Week 6
-19.3; -16.9; -19.6 0.886
SECONDARY
Change From Baseline in CGI-S Total Score at Week 6
-0.90; -0.80; -1.01 0.403

Summary

A clinical trial to study the efficacy and safety of an investigational drug in acutely psychotic people with schizophrenia. Participants in the study will either receive the drug being studied or a placebo. This study is accepting male and female participants between 13 years old -65 years old who have been diagnosed with schizophrenia.

Eligibility Criteria

Inclusion Criteria

  • Male or female subject between 13 to 65 years of age (inclusive) at the time of consent.
  • Subject or subjects parent/legal guardian [adolescents] must give written informed consent and privacy authorization prior to participate in the study; adolescents must also provide informed assent..
  • Subject meets DSM-5 criteria for schizophrenia as established by clinical interview at screening
  • Subject must have a CGI-S score ≥ 4
  • Subject must have a PANSS total score ≥ 80 and a PANSS item score ≥ 4 on 2 or more of the following PANSS items: delusions, conceptual disorganization, hallucinations, and unusual thought content
  • Subject has an acute exacerbation of psychotic symptoms (persisting no longer than 2 months prior to providing informed consent).
  • Subject has marked deterioration of functioning in one or more areas.
  • Subject is, in the opinion of the Investigator, generally healthy based on screening medical history, PE, neurological examination, vital signs, ECG, and clinical laboratory values.

Exclusion Criteria

  • Subject has a DSM-5 diagnosis or presence of symptoms consistent with a DSM-5 diagnosis other than schizophrenia. Exclusionary disorders include but are not limited to alcohol use disorder (within past 12 months), substance (other than nicotine or caffeine) use disorder within past 12 months or lifetime history of significant substance abuse that in the opinion of the Investigator or Sponsor, may have had a significant and potentially permanent impact of the brain or other body systems, major depressive disorder, bipolar I or II disorder, schizoaffective disorder, obsessive compulsive disorder, and posttraumatic stress disorder. Symptoms of mild to moderate mood dysphoria or anxiety are allowed so long as these symptoms are not the primary focus of treatment.
  • Subject is at significant risk of harming self, others, or objects based on Investigator's judgment.
  • Subject has any clinically significant unstable medical condition or any clinically significant chronic disease that in the opinion of the Investigator, would limit the subject's ability to complete and/or participate in the study:
  • Female subject who is pregnant or lactating
  • Subject has any clinically significant abnormal laboratory value(s) at Screening as determined by the investigator.
View full record on ClinicalTrials.gov →

Data sourced from ClinicalTrials.gov (NCT04072354). Outcome figures and adverse-event rates are extracted automatically from the registry's posted results and are provided for clinician reference, not as a substitute for the primary publication.

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