{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?condition=Hypereosinophilic+Syndrome",
    "query": {
      "condition": "Hypereosinophilic Syndrome"
    },
    "page_size": 10
  },
  "pagination": {
    "page": 1,
    "page_size": 10,
    "total_count": 49,
    "total_pages": 5,
    "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?condition=Hypereosinophilic+Syndrome&page=2&page_size=10",
    "previous_page_url": null
  },
  "source": "remote",
  "last_synced_at": "2026-05-22T01:44:43.485Z",
  "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": "NCT00097370",
      "title": "Open-Label Extension Of Intravenous Mepolizumab In Patients With Hypereosinophilic Syndrome",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Hypereosinophilic Syndrome"
      ],
      "interventions": [
        {
          "name": "mepolizumab",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "GlaxoSmithKline",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "75 Years",
        "sex": "ALL",
        "summary": "18 Years to 75 Years"
      },
      "enrollment_count": 78,
      "start_date": "2004-09-30",
      "completion_date": "2010-09-29",
      "has_results": true,
      "last_update_posted_date": "2017-07-07",
      "last_synced_at": "2026-05-22T01:44:43.485Z",
      "location_count": 10,
      "location_summary": "San Diego, California • Denver, Colorado • Bethesda, Maryland + 7 more",
      "locations": [
        {
          "city": "San Diego",
          "state": "California"
        },
        {
          "city": "Denver",
          "state": "Colorado"
        },
        {
          "city": "Bethesda",
          "state": "Maryland"
        },
        {
          "city": "Boston",
          "state": "Massachusetts"
        },
        {
          "city": "Rochester",
          "state": "Minnesota"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00097370"
    },
    {
      "nct_id": "NCT01508936",
      "title": "Study to Evaluate the Efficacy and Safety of Reslizumab Treatment in Patients With Moderate to Severe Asthma",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Eosinophilic Asthma"
      ],
      "interventions": [
        {
          "name": "Reslizumab",
          "type": "DRUG"
        },
        {
          "name": "Placebo",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Teva Branded Pharmaceutical Products R&D, 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": 511,
      "start_date": "2012-02",
      "completion_date": "2013-08",
      "has_results": true,
      "last_update_posted_date": "2016-06-27",
      "last_synced_at": "2026-05-22T01:44:43.485Z",
      "location_count": 66,
      "location_summary": "Birmingham, Alabama • Homewood, Alabama • Jasper, Alabama + 58 more",
      "locations": [
        {
          "city": "Birmingham",
          "state": "Alabama"
        },
        {
          "city": "Homewood",
          "state": "Alabama"
        },
        {
          "city": "Jasper",
          "state": "Alabama"
        },
        {
          "city": "Tucson",
          "state": "Arizona"
        },
        {
          "city": "Tucson",
          "state": "Arizona"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01508936"
    },
    {
      "nct_id": "NCT02130882",
      "title": "Study to Evaluate Safety and Efficacy of Benralizumab in Subjects With Hypereosinophilic Syndrome",
      "overall_status": "UNKNOWN",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2",
        "PHASE3"
      ],
      "conditions": [
        "Respiratory System Agents",
        "Anti-Asthmatic Agents",
        "Hematologic Diseases",
        "Leukocyte Disorders",
        "Hypereosinophilia"
      ],
      "interventions": [
        {
          "name": "benralizumab",
          "type": "DRUG"
        },
        {
          "name": "Placebo",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "DRUG",
        "OTHER"
      ],
      "sponsor": "National Institute of Allergy and Infectious Diseases (NIAID)",
      "sponsor_class": "NIH",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "75 Years",
        "sex": "ALL",
        "summary": "18 Years to 75 Years"
      },
      "enrollment_count": 20,
      "start_date": "2014-05-19",
      "completion_date": "2023-12-31",
      "has_results": true,
      "last_update_posted_date": "2022-02-08",
      "last_synced_at": "2026-05-22T01:44:43.485Z",
      "location_count": 1,
      "location_summary": "Bethesda, Maryland",
      "locations": [
        {
          "city": "Bethesda",
          "state": "Maryland"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02130882"
    },
    {
      "nct_id": "NCT05813288",
      "title": "A Study to Assess the Effect of Dexpramipexole in Adolescents and Adults With Severe Eosinophilic Asthma (EXHALE-3)",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Eosinophilic Asthma",
        "Asthma; Eosinophilic",
        "Asthma"
      ],
      "interventions": [
        {
          "name": "Dexpramipexole Dihydrochloride",
          "type": "DRUG"
        },
        {
          "name": "Placebo",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Areteia Therapeutics",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "12 Years",
        "maximum_age": "99 Years",
        "sex": "ALL",
        "summary": "12 Years to 99 Years"
      },
      "enrollment_count": 654,
      "start_date": "2023-03-27",
      "completion_date": "2025-12-08",
      "has_results": false,
      "last_update_posted_date": "2025-12-15",
      "last_synced_at": "2026-05-22T01:44:43.485Z",
      "location_count": 76,
      "location_summary": "Mobile, Alabama • Chandler, Arizona • Peoria, Arizona + 64 more",
      "locations": [
        {
          "city": "Mobile",
          "state": "Alabama"
        },
        {
          "city": "Chandler",
          "state": "Arizona"
        },
        {
          "city": "Peoria",
          "state": "Arizona"
        },
        {
          "city": "Surprise",
          "state": "Arizona"
        },
        {
          "city": "Tucson",
          "state": "Arizona"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05813288"
    },
    {
      "nct_id": "NCT05334368",
      "title": "Depemokimab in Participants With Hypereosinophilic Syndrome, Efficacy, and Safety Trial",
      "overall_status": "RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Hypereosinophilic Syndrome"
      ],
      "interventions": [
        {
          "name": "Depemokimab",
          "type": "DRUG"
        },
        {
          "name": "Placebo",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "DRUG",
        "OTHER"
      ],
      "sponsor": "GlaxoSmithKline",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 123,
      "start_date": "2022-09-06",
      "completion_date": "2028-12-19",
      "has_results": false,
      "last_update_posted_date": "2025-11-25",
      "last_synced_at": "2026-05-22T01:44:43.485Z",
      "location_count": 11,
      "location_summary": "San Diego, California • Atlanta, Georgia • Boston, Massachusetts + 8 more",
      "locations": [
        {
          "city": "San Diego",
          "state": "California"
        },
        {
          "city": "Atlanta",
          "state": "Georgia"
        },
        {
          "city": "Boston",
          "state": "Massachusetts"
        },
        {
          "city": "Southfield",
          "state": "Michigan"
        },
        {
          "city": "Rochester",
          "state": "Minnesota"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05334368"
    },
    {
      "nct_id": "NCT05692180",
      "title": "A Multicentre, Randomised, Double-blind, Parallel Group, Placebo-controlled, Time-to-first Asthma Exacerbation Phase III Efficacy and Safety Study of Benralizumab in Paediatric Patients With Severe Eosinophilic Asthma (DOMINICA)",
      "overall_status": "RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Asthma"
      ],
      "interventions": [
        {
          "name": "Benralizumab",
          "type": "DRUG"
        },
        {
          "name": "Placebo",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "AstraZeneca",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "6 Years",
        "maximum_age": "18 Years",
        "sex": "ALL",
        "summary": "6 Years to 18 Years"
      },
      "enrollment_count": 200,
      "start_date": "2023-04-05",
      "completion_date": "2032-05-16",
      "has_results": false,
      "last_update_posted_date": "2026-05-06",
      "last_synced_at": "2026-05-22T01:44:43.485Z",
      "location_count": 28,
      "location_summary": "Mobile, Alabama • Montgomery, Alabama • Tucson, Arizona + 24 more",
      "locations": [
        {
          "city": "Mobile",
          "state": "Alabama"
        },
        {
          "city": "Montgomery",
          "state": "Alabama"
        },
        {
          "city": "Tucson",
          "state": "Arizona"
        },
        {
          "city": "Little Rock",
          "state": "Arkansas"
        },
        {
          "city": "Madera",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05692180"
    },
    {
      "nct_id": "NCT06750289",
      "title": "Randomised Clinical Trial to Investigate Efficacy and Safety of Benralizumab 30 mg SC as an add-on Therapy in Uncontrolled Eosinophilic Asthma Patients Treated With Medium-dose ICS-LABA Compared to Conventional Escalation to High-dose ICS-LABA Treatment",
      "overall_status": "RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Eosinophilic Asthma"
      ],
      "interventions": [
        {
          "name": "ICS-LABA",
          "type": "COMBINATION_PRODUCT"
        },
        {
          "name": "benralizumab",
          "type": "COMBINATION_PRODUCT"
        },
        {
          "name": "Placebo for Benralizumab",
          "type": "COMBINATION_PRODUCT"
        }
      ],
      "intervention_types": [
        "COMBINATION_PRODUCT"
      ],
      "sponsor": "AstraZeneca",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "12 Years",
        "maximum_age": "75 Years",
        "sex": "ALL",
        "summary": "12 Years to 75 Years"
      },
      "enrollment_count": 400,
      "start_date": "2025-03-28",
      "completion_date": "2028-11-03",
      "has_results": false,
      "last_update_posted_date": "2026-05-13",
      "last_synced_at": "2026-05-22T01:44:43.485Z",
      "location_count": 34,
      "location_summary": "Chandler, Arizona • Sun City, Arizona • Tucson, Arizona + 28 more",
      "locations": [
        {
          "city": "Chandler",
          "state": "Arizona"
        },
        {
          "city": "Sun City",
          "state": "Arizona"
        },
        {
          "city": "Tucson",
          "state": "Arizona"
        },
        {
          "city": "Bakersfield",
          "state": "California"
        },
        {
          "city": "Inglewood",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT06750289"
    },
    {
      "nct_id": "NCT05002621",
      "title": "Changes in Gene Transcription and Immunophenotypes Following Mepolizumab Treatment for Asthma",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Eosinophilic Asthma"
      ],
      "interventions": [
        {
          "name": "Observational",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "Mayo Clinic",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 20,
      "start_date": "2021-02-16",
      "completion_date": "2025-12-11",
      "has_results": true,
      "last_update_posted_date": "2026-03-18",
      "last_synced_at": "2026-05-22T01:44:43.485Z",
      "location_count": 1,
      "location_summary": "Rochester, Minnesota",
      "locations": [
        {
          "city": "Rochester",
          "state": "Minnesota"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05002621"
    },
    {
      "nct_id": "NCT03683576",
      "title": "GB001 in Adult Subjects With Moderate to Severe Asthma",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Asthma"
      ],
      "interventions": [
        {
          "name": "GB001",
          "type": "DRUG"
        },
        {
          "name": "Placebo",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "GB001, Inc, a wholly owned subsidiary of Gossamer Bio, Inc.",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "74 Years",
        "sex": "ALL",
        "summary": "18 Years to 74 Years"
      },
      "enrollment_count": 481,
      "start_date": "2018-10-22",
      "completion_date": "2020-08-18",
      "has_results": true,
      "last_update_posted_date": "2021-09-16",
      "last_synced_at": "2026-05-22T01:44:43.485Z",
      "location_count": 47,
      "location_summary": "Birmingham, Alabama • Tucson, Arizona • Los Angeles, California + 41 more",
      "locations": [
        {
          "city": "Birmingham",
          "state": "Alabama"
        },
        {
          "city": "Tucson",
          "state": "Arizona"
        },
        {
          "city": "Los Angeles",
          "state": "California"
        },
        {
          "city": "Los Angeles",
          "state": "California"
        },
        {
          "city": "Napa",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03683576"
    },
    {
      "nct_id": "NCT01290887",
      "title": "Open-Label Extension Study to Evaluate the Long-Term Safety and Efficacy of Reslizumab (3.0 mg/kg) as Treatment for Patients (12 Through 75 Years of Age) With Eosinophilic Asthma",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Eosinophilic Asthma"
      ],
      "interventions": [
        {
          "name": "Reslizumab",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Teva Branded Pharmaceutical Products R&D, Inc.",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "12 Years",
        "maximum_age": "75 Years",
        "sex": "ALL",
        "summary": "12 Years to 75 Years"
      },
      "enrollment_count": 1052,
      "start_date": "2011-06",
      "completion_date": "2015-01",
      "has_results": true,
      "last_update_posted_date": "2016-06-06",
      "last_synced_at": "2026-05-22T01:44:43.485Z",
      "location_count": 48,
      "location_summary": "Scottsdale, Arizona • Anaheim, California • Fountain Valley, California + 39 more",
      "locations": [
        {
          "city": "Scottsdale",
          "state": "Arizona"
        },
        {
          "city": "Anaheim",
          "state": "California"
        },
        {
          "city": "Fountain Valley",
          "state": "California"
        },
        {
          "city": "Fresno",
          "state": "California"
        },
        {
          "city": "Long Beach",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01290887"
    }
  ]
}