{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?sponsor=Otsuka+America+Pharmaceutical",
    "query": {
      "sponsor": "Otsuka America Pharmaceutical"
    },
    "page_size": 10
  },
  "pagination": {
    "page": 1,
    "page_size": 10,
    "total_count": 57,
    "total_pages": 6,
    "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?sponsor=Otsuka+America+Pharmaceutical&page=2&page_size=10",
    "previous_page_url": null
  },
  "source": "remote",
  "last_synced_at": "2026-10-08T07:41:23.292Z",
  "attribution": "Data derived from public ClinicalTrials.gov records. The official record at https://clinicaltrials.gov/ remains the source of truth for current availability, contacts, and full study details.",
  "notes": [
    "This endpoint exposes only public summary fields — no participant contact emails, phone numbers, or scraped investigator contact details.",
    "For contact information and full protocol detail, follow each trial's `official_url` to the ClinicalTrials.gov record.",
    "This API is a navigational aid. It does not provide medical advice, eligibility determinations, or compensation guarantees."
  ],
  "trials": [
    {
      "nct_id": "NCT01556646",
      "title": "Effect of Tolvaptan on Cognitive Function in Cirrhosis",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Cirrhosis",
        "Hepatic Encephalopathy",
        "Hyponatremia"
      ],
      "interventions": [
        {
          "name": "Tolvaptan",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Hunter Holmes Mcguire Veteran Affairs Medical Center",
      "sponsor_class": "FED",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "75 Years",
        "sex": "ALL",
        "summary": "18 Years to 75 Years"
      },
      "enrollment_count": 25,
      "start_date": "2011-04",
      "completion_date": "2013-06",
      "has_results": false,
      "last_update_posted_date": "2014-02-07",
      "last_synced_at": "2026-10-08T07:41:23.292Z",
      "location_count": 1,
      "location_summary": "Richmond, Virginia",
      "locations": [
        {
          "city": "Richmond",
          "state": "Virginia"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01556646"
    },
    {
      "nct_id": "NCT01890694",
      "title": "Tolvaptan to Reduce Length of Stay in Hospitalized Patients With Cirrhosis and Hyponatremia",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE4"
      ],
      "conditions": [
        "Hyponatremia"
      ],
      "interventions": [
        {
          "name": "Tolvaptan",
          "type": "DRUG"
        },
        {
          "name": "Placebo",
          "type": "DRUG"
        },
        {
          "name": "Hepatic Encephalopathy Assessment",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Quality of Life Assessment",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Vital signs",
          "type": "BIOLOGICAL"
        },
        {
          "name": "Blood laboratory tests",
          "type": "BIOLOGICAL"
        },
        {
          "name": "Ascites Evaluation",
          "type": "PROCEDURE"
        },
        {
          "name": "Edema",
          "type": "PROCEDURE"
        }
      ],
      "intervention_types": [
        "DRUG",
        "BEHAVIORAL",
        "BIOLOGICAL",
        "PROCEDURE"
      ],
      "sponsor": "NYU Langone Health",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 2,
      "start_date": "2012-03",
      "completion_date": "2015-03",
      "has_results": true,
      "last_update_posted_date": "2017-12-11",
      "last_synced_at": "2026-10-08T07:41:23.292Z",
      "location_count": 1,
      "location_summary": "New York, New York",
      "locations": [
        {
          "city": "New York",
          "state": "New York"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01890694"
    },
    {
      "nct_id": "NCT02282085",
      "title": "Treatment Study Comparing Aripiprazole Once Monthly With Standard of Care Medication in Outpatients With Schizophrenia",
      "overall_status": "UNKNOWN",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE4"
      ],
      "conditions": [
        "Schizophrenia"
      ],
      "interventions": [
        {
          "name": "Aripiprazole Once-Monthly",
          "type": "DRUG"
        },
        {
          "name": "Oral Antipsychotic (i.e. aripiprazole, risperidone, lurasidone, quetiapine, olanzapine, ziprasidone, etc)",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Matt Byerly",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "60 Years",
        "sex": "ALL",
        "summary": "18 Years to 60 Years"
      },
      "enrollment_count": 200,
      "start_date": "2014-12",
      "completion_date": null,
      "has_results": false,
      "last_update_posted_date": "2015-06-08",
      "last_synced_at": "2026-10-08T07:41:23.292Z",
      "location_count": 1,
      "location_summary": "Dallas, Texas",
      "locations": [
        {
          "city": "Dallas",
          "state": "Texas"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02282085"
    },
    {
      "nct_id": "NCT00095758",
      "title": "A Study of Adjunctive Aripiprazole in Participants With Major Depressive Disorder",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Major Depressive Disorder"
      ],
      "interventions": [
        {
          "name": "Antidepressant + Placebo",
          "type": "DRUG"
        },
        {
          "name": "Antidepressant + Aripiprazole",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Otsuka Pharmaceutical Development & Commercialization, Inc.",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "65 Years",
        "sex": "ALL",
        "summary": "18 Years to 65 Years"
      },
      "enrollment_count": 1151,
      "start_date": "2004-09-01",
      "completion_date": "2006-12-01",
      "has_results": false,
      "last_update_posted_date": "2026-07-13",
      "last_synced_at": "2026-10-08T07:41:23.292Z",
      "location_count": 28,
      "location_summary": "Beverly Hills, California • Burbank, California • National City, California + 25 more",
      "locations": [
        {
          "city": "Beverly Hills",
          "state": "California"
        },
        {
          "city": "Burbank",
          "state": "California"
        },
        {
          "city": "National City",
          "state": "California"
        },
        {
          "city": "Orange",
          "state": "California"
        },
        {
          "city": "Pasadena",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00095758"
    },
    {
      "nct_id": "NCT01973140",
      "title": "Effects of Tolvaptan in Healthy Adults",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE4"
      ],
      "conditions": [
        "Healthy"
      ],
      "interventions": [
        {
          "name": "Tolvaptan",
          "type": "DRUG"
        },
        {
          "name": "Hypertonic saline infusion",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Northwestern University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "21 Years",
        "maximum_age": "55 Years",
        "sex": "MALE",
        "summary": "21 Years to 55 Years · Male only"
      },
      "enrollment_count": 17,
      "start_date": "2013-11",
      "completion_date": "2016-03",
      "has_results": false,
      "last_update_posted_date": "2016-09-28",
      "last_synced_at": "2026-10-08T07:41:23.292Z",
      "location_count": 1,
      "location_summary": "Chicago, Illinois",
      "locations": [
        {
          "city": "Chicago",
          "state": "Illinois"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01973140"
    },
    {
      "nct_id": "NCT00048763",
      "title": "Safety and Efficacy of Pletal(Cilostazol) for the Treatment of Juvenile Primary and Secondary Raynaud's Phenomenon",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE4"
      ],
      "conditions": [
        "Raynaud's Disease"
      ],
      "interventions": [
        {
          "name": "Pletal",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Otsuka America Pharmaceutical",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "5 Years",
        "maximum_age": "16 Years",
        "sex": "ALL",
        "summary": "5 Years to 16 Years"
      },
      "enrollment_count": 75,
      "start_date": "2001-10",
      "completion_date": "2003-06",
      "has_results": false,
      "last_update_posted_date": "2005-07-19",
      "last_synced_at": "2026-10-08T07:41:23.292Z",
      "location_count": 18,
      "location_summary": "Anchorage, Alaska • Fresno, California • Madera, California + 15 more",
      "locations": [
        {
          "city": "Anchorage",
          "state": "Alaska"
        },
        {
          "city": "Fresno",
          "state": "California"
        },
        {
          "city": "Madera",
          "state": "California"
        },
        {
          "city": "Hartford",
          "state": "Connecticut"
        },
        {
          "city": "Chicago",
          "state": "Illinois"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00048763"
    },
    {
      "nct_id": "NCT01240668",
      "title": "Hyponatremia Registry for Patients With Euvolemic and Hypervolemic Hyponatremia",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Euvolemic Hyponatremia",
        "Hypervolemic Hyponatremia"
      ],
      "interventions": [],
      "intervention_types": [],
      "sponsor": "Otsuka America Pharmaceutical",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 5028,
      "start_date": "2010-09",
      "completion_date": "2013-08",
      "has_results": false,
      "last_update_posted_date": "2015-05-15",
      "last_synced_at": "2026-10-08T07:41:23.292Z",
      "location_count": 72,
      "location_summary": "Azusa, California • Inglewood, California • Los Angeles, California + 58 more",
      "locations": [
        {
          "city": "Azusa",
          "state": "California"
        },
        {
          "city": "Inglewood",
          "state": "California"
        },
        {
          "city": "Los Angeles",
          "state": "California"
        },
        {
          "city": "Sacramento",
          "state": "California"
        },
        {
          "city": "Denver",
          "state": "Colorado"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01240668"
    },
    {
      "nct_id": "NCT00332241",
      "title": "Study of Aripiprazole in the Treatment of Children and Adolescents With Autistic Disorder (AD).",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Autistic Disorder"
      ],
      "interventions": [
        {
          "name": "Aripiprazole",
          "type": "DRUG"
        },
        {
          "name": "Placebo",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Otsuka Pharmaceutical Development & Commercialization, Inc.",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "6 Years",
        "maximum_age": "17 Years",
        "sex": "ALL",
        "summary": "6 Years to 17 Years"
      },
      "enrollment_count": 98,
      "start_date": "2006-06-01",
      "completion_date": "2008-04-01",
      "has_results": true,
      "last_update_posted_date": "2026-05-13",
      "last_synced_at": "2026-10-08T07:41:23.292Z",
      "location_count": 9,
      "location_summary": "Boca Raton, Florida • Atlanta, Georgia • Louisville, Kentucky + 6 more",
      "locations": [
        {
          "city": "Boca Raton",
          "state": "Florida"
        },
        {
          "city": "Atlanta",
          "state": "Georgia"
        },
        {
          "city": "Louisville",
          "state": "Kentucky"
        },
        {
          "city": "Bloomfield Hills",
          "state": "Michigan"
        },
        {
          "city": "Las Vegas",
          "state": "Nevada"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00332241"
    },
    {
      "nct_id": "NCT00002129",
      "title": "A Phase I Study of Three Doses of OPC-8212 (Vesnarinone) in HIV-Infected Persons With CD4+ Cell Number > 300 Cells/mm3",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1"
      ],
      "conditions": [
        "HIV Infections"
      ],
      "interventions": [
        {
          "name": "Vesnarinone",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Otsuka America Pharmaceutical",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 36,
      "start_date": null,
      "completion_date": null,
      "has_results": false,
      "last_update_posted_date": "2005-06-24",
      "last_synced_at": "2026-10-08T07:41:23.292Z",
      "location_count": 1,
      "location_summary": "Los Angeles, California",
      "locations": [
        {
          "city": "Los Angeles",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00002129"
    },
    {
      "nct_id": "NCT01131169",
      "title": "Busulfan, Melphalan, Fludarabine and T-Cell Depleted Allogeneic Hematopoietic Stem Cell Transplantation Followed by Post Transplantation Donor Lymphocyte Infusions",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Multiple Myeloma"
      ],
      "interventions": [
        {
          "name": "busulfan, melphalan and fludarabine",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Memorial Sloan Kettering Cancer Center",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "21 Years",
        "maximum_age": "72 Years",
        "sex": "ALL",
        "summary": "21 Years to 72 Years"
      },
      "enrollment_count": 66,
      "start_date": "2010-05",
      "completion_date": "2020-05-15",
      "has_results": true,
      "last_update_posted_date": "2021-12-02",
      "last_synced_at": "2026-10-08T07:41:23.292Z",
      "location_count": 1,
      "location_summary": "New York, New York",
      "locations": [
        {
          "city": "New York",
          "state": "New York"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01131169"
    }
  ]
}