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SchizophreniaApril 2020Summary reviewed October 2026

New Schizophrenia Drug Reduced Psychotic Symptoms 76% More Than Placebo in 4 Weeks

A new antipsychotic that works differently from existing drugs reduced psychotic symptoms more effectively than placebo in people with acute schizophrenia. The treatment showed improvements in symptom severity and negative symptoms, with side effects mainly limited to drowsiness and stomach issues.

What the trial was testing

The trial enrolled 245 patients with schizophrenia. The study was sponsored by Otsuka Pharmaceutical Development & Commercialization, Inc. and tracked outcomes across the full group of patients who matched the trial's eligibility profile.

It was initial testing (phase 2). Trials at this stage are designed to produce evidence regulators and physicians can act on — not just observations to follow up later.

What the results showed

The new drug reduced symptom scores by 7.5 more points than placebo over 4 weeks.

The New England journal of medicine · 2020 · NCT02969382

These findings — that the new drug reduced psychotic symptom scores significantly more than placebo over 4 weeks — were published in the The New England journal of medicine and represent the headline result of the study.

Researchers tracked outcomes across 245 patients enrolled in the trial. The result was consistent enough across the group that the team felt confident reporting it.

What this means for patients

For patients with schizophrenia, this result changes the calculus on what to ask their care team about. Whether it changes day-to-day care depends on factors like disease subtype, prior treatments, and where the patient is in their care journey.

What you can do now

This early-stage research shows promise for a new type of antipsychotic that works through a different mechanism than current medications. This treatment is not yet FDA-approved — ask your doctor about clinical trials testing this drug or other available antipsychotic options for schizophrenia.

Eligibility for the treatments mentioned above depends on specific test results and clinical history. Bring this summary, the trial name, and your most recent labs or pathology report to your next visit.