{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Quetiapine+Fumarate+Sustained+Release",
    "query": {
      "intervention": "Quetiapine Fumarate Sustained Release"
    },
    "page_size": 10
  },
  "pagination": {
    "page": 1,
    "page_size": 10,
    "total_count": 13,
    "total_pages": 2,
    "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Quetiapine+Fumarate+Sustained+Release&page=2&page_size=10",
    "previous_page_url": null
  },
  "source": "remote",
  "last_synced_at": "2026-09-30T04:55:21.164Z",
  "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": "NCT00206128",
      "title": "Immediate Release (IR) to Sustained Release (SR) Switching Study: Study of Switching From IR Seroquel to SR Seroquel in Outpatients With Schizophrenia",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Schizophrenia"
      ],
      "interventions": [
        {
          "name": "Seroquel SR",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "AstraZeneca",
      "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": 454,
      "start_date": "2004-11",
      "completion_date": "2006-02",
      "has_results": false,
      "last_update_posted_date": "2013-01-04",
      "last_synced_at": "2026-09-30T04:55:21.164Z",
      "location_count": 18,
      "location_summary": "Birmingham, Alabama • Anaheim, California • Cerritos, California + 15 more",
      "locations": [
        {
          "city": "Birmingham",
          "state": "Alabama"
        },
        {
          "city": "Anaheim",
          "state": "California"
        },
        {
          "city": "Cerritos",
          "state": "California"
        },
        {
          "city": "Garden Grove",
          "state": "California"
        },
        {
          "city": "National City",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00206128"
    },
    {
      "nct_id": "NCT00422214",
      "title": "Phase III/Seroquel SR Bipolar Depression Monotherapy - US",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Affective Psychosis, Bipolar",
        "Depression, Bipolar",
        "Manic-Depressive Psychosis",
        "Psychoses, Manic-Depressive"
      ],
      "interventions": [
        {
          "name": "Quetiapine fumarate (Seroquel) SR",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "AstraZeneca",
      "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": 400,
      "start_date": "2006-12",
      "completion_date": "2007-06",
      "has_results": false,
      "last_update_posted_date": "2009-03-25",
      "last_synced_at": "2026-09-30T04:55:21.164Z",
      "location_count": 54,
      "location_summary": "Birmingham, Alabama • Phoenix, Arizona • Scottsdale, Arizona + 51 more",
      "locations": [
        {
          "city": "Birmingham",
          "state": "Alabama"
        },
        {
          "city": "Phoenix",
          "state": "Arizona"
        },
        {
          "city": "Scottsdale",
          "state": "Arizona"
        },
        {
          "city": "Little Rock",
          "state": "Arkansas"
        },
        {
          "city": "Cerritos",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00422214"
    },
    {
      "nct_id": "NCT00320268",
      "title": "Safety & Efficacy Study of Quetiapine Fumarate (SEROQUEL®) vs. Placebo in Major Depressive Disorder",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Major Depressive Disorder"
      ],
      "interventions": [
        {
          "name": "Quetiapine fumarate",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "AstraZeneca",
      "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": 600,
      "start_date": "2006-04",
      "completion_date": "2007-05",
      "has_results": false,
      "last_update_posted_date": "2009-03-25",
      "last_synced_at": "2026-09-30T04:55:21.164Z",
      "location_count": 37,
      "location_summary": "Little Rock, Arkansas • Newport Beach, California • Northridge, California + 34 more",
      "locations": [
        {
          "city": "Little Rock",
          "state": "Arkansas"
        },
        {
          "city": "Newport Beach",
          "state": "California"
        },
        {
          "city": "Northridge",
          "state": "California"
        },
        {
          "city": "Oceanside",
          "state": "California"
        },
        {
          "city": "Santa Ana",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00320268"
    },
    {
      "nct_id": "NCT00321490",
      "title": "Safety & Efficacy Study of Quetiapine Fumarate (SEROQUEL®) vs. Placebo and Active Control in Major Depressive Disorder",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Major Depressive Disorder"
      ],
      "interventions": [
        {
          "name": "Quetiapine fumarate",
          "type": "DRUG"
        },
        {
          "name": "Duloxetine",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "AstraZeneca",
      "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": 600,
      "start_date": "2006-04",
      "completion_date": "2007-05",
      "has_results": false,
      "last_update_posted_date": "2009-03-25",
      "last_synced_at": "2026-09-30T04:55:21.164Z",
      "location_count": 34,
      "location_summary": "Birmingham, Alabama • Scottsdale, Arizona • Beverly Hills, California + 31 more",
      "locations": [
        {
          "city": "Birmingham",
          "state": "Alabama"
        },
        {
          "city": "Scottsdale",
          "state": "Arizona"
        },
        {
          "city": "Beverly Hills",
          "state": "California"
        },
        {
          "city": "San Diego",
          "state": "California"
        },
        {
          "city": "Sherman Oaks",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00321490"
    },
    {
      "nct_id": "NCT00326105",
      "title": "Efficacy and Safety of Quetiapine Fumarate Sustained Release (SEROQUEL SR) in Combination With an Antidepressant in the Treatment of Major Depressive Disorders",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Major Depressive Disorder"
      ],
      "interventions": [
        {
          "name": "Quetiapine fumarate",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "AstraZeneca",
      "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": 450,
      "start_date": "2006-04",
      "completion_date": "2007-07",
      "has_results": false,
      "last_update_posted_date": "2009-03-25",
      "last_synced_at": "2026-09-30T04:55:21.164Z",
      "location_count": 56,
      "location_summary": "Phoenix, Arizona • El Centro, California • Irvine, California + 53 more",
      "locations": [
        {
          "city": "Phoenix",
          "state": "Arizona"
        },
        {
          "city": "El Centro",
          "state": "California"
        },
        {
          "city": "Irvine",
          "state": "California"
        },
        {
          "city": "Oceanside",
          "state": "California"
        },
        {
          "city": "San Diego",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00326105"
    },
    {
      "nct_id": "NCT00329264",
      "title": "Safety & Efficacy Study of Quetiapine Fumarate (SEROQUEL®) vs. Placebo in Generalized Anxiety Disorder",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Generalized Anxiety Disorder"
      ],
      "interventions": [
        {
          "name": "Quetiapine fumarate",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "AstraZeneca",
      "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": 876,
      "start_date": "2006-04",
      "completion_date": "2007-08",
      "has_results": false,
      "last_update_posted_date": "2009-03-25",
      "last_synced_at": "2026-09-30T04:55:21.164Z",
      "location_count": 58,
      "location_summary": "Springdale, Arizona • Little Rock, Arkansas • Encino, California + 55 more",
      "locations": [
        {
          "city": "Springdale",
          "state": "Arizona"
        },
        {
          "city": "Little Rock",
          "state": "Arkansas"
        },
        {
          "city": "Encino",
          "state": "California"
        },
        {
          "city": "Newport Beach",
          "state": "California"
        },
        {
          "city": "Oceanside",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00329264"
    },
    {
      "nct_id": "NCT00388973",
      "title": "Efficacy and Safety Study of Seroquel SR in the Treatment of Major Depressive Disorder",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Major Depressive Disorder"
      ],
      "interventions": [
        {
          "name": "Quetiapine",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "AstraZeneca",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "66 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "66 Years and older"
      },
      "enrollment_count": 338,
      "start_date": "2006-09",
      "completion_date": "2007-12",
      "has_results": true,
      "last_update_posted_date": "2010-04-01",
      "last_synced_at": "2026-09-30T04:55:21.164Z",
      "location_count": 13,
      "location_summary": "Birmingham, Alabama • San Diego, California • Fort Myers, Florida + 10 more",
      "locations": [
        {
          "city": "Birmingham",
          "state": "Alabama"
        },
        {
          "city": "San Diego",
          "state": "California"
        },
        {
          "city": "Fort Myers",
          "state": "Florida"
        },
        {
          "city": "Gainsville",
          "state": "Florida"
        },
        {
          "city": "Sarasota",
          "state": "Florida"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00388973"
    },
    {
      "nct_id": "NCT00326144",
      "title": "Efficacy and Safety of Quetiapine Fumarate Sustained Release (SEROQUEL SR) in the Treatment of Major Depressive Disorders",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Major Depressive Disorder"
      ],
      "interventions": [
        {
          "name": "Quetiapine fumarate",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "AstraZeneca",
      "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": 310,
      "start_date": "2006-04",
      "completion_date": "2007-05",
      "has_results": false,
      "last_update_posted_date": "2009-03-25",
      "last_synced_at": "2026-09-30T04:55:21.164Z",
      "location_count": 34,
      "location_summary": "Phoenix, Arizona • Little Rock, Arkansas • Anaheim, California + 31 more",
      "locations": [
        {
          "city": "Phoenix",
          "state": "Arizona"
        },
        {
          "city": "Little Rock",
          "state": "Arkansas"
        },
        {
          "city": "Anaheim",
          "state": "California"
        },
        {
          "city": "El Centro",
          "state": "California"
        },
        {
          "city": "Garden Grove",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00326144"
    },
    {
      "nct_id": "NCT00422123",
      "title": "Phase 3 /Seroquel SR Acute Mania Monotherapy - US",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Affective Psychosis, Bipolar",
        "Manic Disorder",
        "Manic-Depressive Psychosis",
        "Mania",
        "Manic State",
        "Psychoses, Manic-Depressive"
      ],
      "interventions": [
        {
          "name": "Quetiapine fumarate (Seroquel) SR",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "AstraZeneca",
      "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": 447,
      "start_date": "2007-01",
      "completion_date": "2007-07",
      "has_results": false,
      "last_update_posted_date": "2009-03-25",
      "last_synced_at": "2026-09-30T04:55:21.164Z",
      "location_count": 51,
      "location_summary": "Phoenix, Arizona • Little Rock, Arkansas • Cerritos, California + 48 more",
      "locations": [
        {
          "city": "Phoenix",
          "state": "Arizona"
        },
        {
          "city": "Little Rock",
          "state": "Arkansas"
        },
        {
          "city": "Cerritos",
          "state": "California"
        },
        {
          "city": "Garden Grove",
          "state": "California"
        },
        {
          "city": "Oceanside",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00422123"
    },
    {
      "nct_id": "NCT00278941",
      "title": "Quetiapine Fumarate as Monotherapy in the Maintenance Treatment of Patients With Major Depressive Disorder",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Major Depressive Disorder"
      ],
      "interventions": [
        {
          "name": "Quetiapine Fumarate Sustained Release",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "AstraZeneca",
      "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": 3000,
      "start_date": "2005-12",
      "completion_date": "2007-08",
      "has_results": false,
      "last_update_posted_date": "2009-03-25",
      "last_synced_at": "2026-09-30T04:55:21.164Z",
      "location_count": 144,
      "location_summary": "Birmingham, Alabama • Tuscaloosa, Alabama • Mesa, Arizona + 141 more",
      "locations": [
        {
          "city": "Birmingham",
          "state": "Alabama"
        },
        {
          "city": "Tuscaloosa",
          "state": "Alabama"
        },
        {
          "city": "Mesa",
          "state": "Arizona"
        },
        {
          "city": "Peoria",
          "state": "Arizona"
        },
        {
          "city": "Little Rock",
          "state": "Arkansas"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00278941"
    }
  ]
}