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Clinical trials and research at Otsuka Pharmaceutical Co., Ltd.

• 9Clinical trials
• 1Country

Newest trials

All recruiting trials (9)

• Long-term SEP-363856 treatment for adults with schizophrenia

  This trial will test whether taking SEP-363856 (75 mg or 100 mg daily) for 52 weeks is safe for adults in Japan who have stable schizophrenia.

  Recruiting Phase 3 Otsuka Pharmaceutical Co., Ltd. · Fukuoka · NCT07225712

• Long-term EB-1020 treatment for children with ADHD

  This trial will test whether giving children with ADHD mainly high doses of EB-1020 for 52 weeks is safe.

  Recruiting Phase 3 Otsuka Pharmaceutical Co., Ltd. · Sapporo · NCT07087327

• EB-1020 (centanafadine) for ADHD in children and adolescents

  This study tests two once-daily doses of EB-1020 (centanafadine) against placebo to see if it reduces ADHD symptoms and is safe for children and adolescents.

  Recruiting Phase 2/3 Otsuka Pharmaceutical Co., Ltd. · Sapporo · NCT07086313

• Survey of LUPKYNIS (voclosporin) use in lupus nephritis

  This survey will collect safety and effectiveness information about LUPKYNIS (voclosporin) in people who are newly starting treatment for lupus nephritis.

  Recruiting Otsuka Pharmaceutical Co., Ltd. · Osaka · NCT07053891

• Evaluating EB-1020 for treating adult ADHD

  This study is testing if a new medication called EB-1020 can help adults with ADHD manage their symptoms better than a placebo.

  Recruiting Phase 2/3 Otsuka Pharmaceutical Co., Ltd. · Tokyo · NCT06931080

• Long-term treatment with EB-1020 for adults with ADHD

  This study is testing if a new ADHD medication called EB-1020 is safe and effective for adults who have already tried it in a previous trial over a year-long period.

  Recruiting Phase 3 Otsuka Pharmaceutical Co., Ltd. · Tokyo · NCT06926829

• Survey on the use of REXULTI for managing aggressive behavior in Alzheimer's patients

  This study is testing if REXULTI can help manage aggressive behavior in people with Alzheimer's disease by looking at how well it works and its safety in everyday settings.

  Recruiting Otsuka Pharmaceutical Co., Ltd. · Osaka · NCT06875986

• Survey on long-term use of AJOVY for migraine treatment

  This study is looking to see how safe AJOVY is for people using it to treat migraines over a long time, especially regarding heart-related issues.

  Recruiting Otsuka Pharmaceutical Co., Ltd. · Osaka · NCT05342493

• Brexpiprazole once a week for treating acute schizophrenia

  This study is testing if a new once-a-week medication can help adults with acute schizophrenia feel better compared to a placebo.

  Recruiting Phase 3 Otsuka Pharmaceutical Co., Ltd. · Kure-shi · NCT05325645

Quick answers

How many clinical trials run by Otsuka Pharmaceutical Co., Ltd. are recruiting right now?

9, as of November 12, 2026. We update this list each time we refresh our data from ClinicalTrials.gov.

Where are these trials running?

All of them have sites in Japan. Each study page lists its sites and which ones are recruiting.

What phases are they in?

Phase 3: 4, Phase 2/3: 2. Trials with no phase listed are usually device, behavioural or observational studies.

How do I join one?

Open a study, check the "Is this trial a fit for you?" section, then contact the study team listed on the page. They will ask a few screening questions. Asking is free and does not commit you to anything. Talk it over with your doctor first.

Find the studies that fit you

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