{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=C1-esterase+inhibitor&page=2",
    "query": {
      "intervention": "C1-esterase inhibitor",
      "page": 2
    },
    "page_size": 10
  },
  "pagination": {
    "page": 2,
    "page_size": 10,
    "total_count": 51,
    "total_pages": 6,
    "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=C1-esterase+inhibitor&page=3&page_size=10",
    "previous_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=C1-esterase+inhibitor&page=1&page_size=10"
  },
  "source": "remote",
  "last_synced_at": "2026-10-02T15:27:54.392Z",
  "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": "NCT01759602",
      "title": "C1-esterase Inhibitor (Cinryze) for Acute Treatment of Neuromyelitis Optica Exacerbation",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1"
      ],
      "conditions": [
        "Neuromyelitis Optica"
      ],
      "interventions": [
        {
          "name": "C1-esterase inhibitor (Cinryze)",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Michael Levy",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "65 Years",
        "sex": "ALL",
        "summary": "18 Years to 65 Years"
      },
      "enrollment_count": 10,
      "start_date": "2013-01",
      "completion_date": "2013-11",
      "has_results": true,
      "last_update_posted_date": "2014-07-18",
      "last_synced_at": "2026-10-02T15:27:54.392Z",
      "location_count": 1,
      "location_summary": "Baltimore, Maryland",
      "locations": [
        {
          "city": "Baltimore",
          "state": "Maryland"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01759602"
    },
    {
      "nct_id": "NCT06210698",
      "title": "Angioedema Biomarker Research Study",
      "overall_status": "RECRUITING",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Angioedema",
        "Angioedemas, Hereditary",
        "Urticaria",
        "Mastocytosis",
        "ACE Inhibitor-Induced Angioedema",
        "C1 Inhibitor Deficiency",
        "Systemic Mastocytoses",
        "Indolent Systemic Mastocytosis"
      ],
      "interventions": [
        {
          "name": "Venipuncture",
          "type": "DIAGNOSTIC_TEST"
        }
      ],
      "intervention_types": [
        "DIAGNOSTIC_TEST"
      ],
      "sponsor": "Foundation For Rare Disease Research",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "12 Years",
        "maximum_age": "75 Years",
        "sex": "ALL",
        "summary": "12 Years to 75 Years"
      },
      "enrollment_count": 600,
      "start_date": "2024-01-15",
      "completion_date": "2027-08-01",
      "has_results": false,
      "last_update_posted_date": "2026-08-24",
      "last_synced_at": "2026-10-02T15:27:54.392Z",
      "location_count": 1,
      "location_summary": "Wheaton, Maryland",
      "locations": [
        {
          "city": "Wheaton",
          "state": "Maryland"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT06210698"
    },
    {
      "nct_id": "NCT03697187",
      "title": "Patient Registry to Evaluate the Real-world Safety of Ruconest®",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Hereditary Angioedema"
      ],
      "interventions": [
        {
          "name": "rhC1INH",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Pharming Technologies B.V.",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "13 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "13 Years and older"
      },
      "enrollment_count": 152,
      "start_date": "2018-06-30",
      "completion_date": "2021-07-31",
      "has_results": false,
      "last_update_posted_date": "2024-04-05",
      "last_synced_at": "2026-10-02T15:27:54.392Z",
      "location_count": 1,
      "location_summary": "Fairfax, Virginia",
      "locations": [
        {
          "city": "Fairfax",
          "state": "Virginia"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03697187"
    },
    {
      "nct_id": "NCT00289211",
      "title": "C1 Esterase Inhibitor (C1INH-nf) for the Treatment of Acute Hereditary Angioedema (HAE) Attacks",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Hereditary Angioedema"
      ],
      "interventions": [
        {
          "name": "C1 esterase inhibitor [human] (C1INH-nf)",
          "type": "BIOLOGICAL"
        },
        {
          "name": "Placebo (saline)",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "BIOLOGICAL",
        "DRUG"
      ],
      "sponsor": "Shire",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "6 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "6 Years and older"
      },
      "enrollment_count": 83,
      "start_date": "2005-03-14",
      "completion_date": "2007-04-13",
      "has_results": true,
      "last_update_posted_date": "2021-06-11",
      "last_synced_at": "2026-10-02T15:27:54.392Z",
      "location_count": 37,
      "location_summary": "Hoover, Alabama • Scottsdale, Arizona • Los Angeles, California + 34 more",
      "locations": [
        {
          "city": "Hoover",
          "state": "Alabama"
        },
        {
          "city": "Scottsdale",
          "state": "Arizona"
        },
        {
          "city": "Los Angeles",
          "state": "California"
        },
        {
          "city": "San Diego",
          "state": "California"
        },
        {
          "city": "Walnut Creek",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00289211"
    },
    {
      "nct_id": "NCT04206605",
      "title": "A Study of Lanadelumab in Teenagers and Adults to Prevent Acute Attacks of Non-histaminergic Angioedema With Normal C1-Inhibitor (C1-INH)",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Angioedema"
      ],
      "interventions": [
        {
          "name": "Placebo",
          "type": "OTHER"
        },
        {
          "name": "Lanadelumab",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "OTHER",
        "DRUG"
      ],
      "sponsor": "Takeda",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "12 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "12 Years and older"
      },
      "enrollment_count": 77,
      "start_date": "2020-05-04",
      "completion_date": "2022-10-20",
      "has_results": true,
      "last_update_posted_date": "2023-12-27",
      "last_synced_at": "2026-10-02T15:27:54.392Z",
      "location_count": 20,
      "location_summary": "Birmingham, Alabama • Scottsdale, Arizona • San Diego, California + 17 more",
      "locations": [
        {
          "city": "Birmingham",
          "state": "Alabama"
        },
        {
          "city": "Scottsdale",
          "state": "Arizona"
        },
        {
          "city": "San Diego",
          "state": "California"
        },
        {
          "city": "Santa Monica",
          "state": "California"
        },
        {
          "city": "Walnut Creek",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04206605"
    },
    {
      "nct_id": "NCT00292981",
      "title": "C1 Esterase Inhibitor in Hereditary Angioedema (HAE)(Extension Study)",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Hereditary Angioedema"
      ],
      "interventions": [
        {
          "name": "C1 Esterase Inhibitor",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "CSL Behring",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "6 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "6 Years and older"
      },
      "enrollment_count": 57,
      "start_date": "2005-08",
      "completion_date": "2010-05",
      "has_results": true,
      "last_update_posted_date": "2015-05-07",
      "last_synced_at": "2026-10-02T15:27:54.392Z",
      "location_count": 13,
      "location_summary": "Weston, Florida • Atlanta, Georgia • Idaho Falls, Idaho + 10 more",
      "locations": [
        {
          "city": "Weston",
          "state": "Florida"
        },
        {
          "city": "Atlanta",
          "state": "Georgia"
        },
        {
          "city": "Idaho Falls",
          "state": "Idaho"
        },
        {
          "city": "Chicago",
          "state": "Illinois"
        },
        {
          "city": "Shreveport",
          "state": "Louisiana"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00292981"
    },
    {
      "nct_id": "NCT04705831",
      "title": "Study to Evaluate the Benefit of RUCONEST in Improving Neurological Symptoms in Post COVID-19 Infection",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Post-Viral Fatigue Syndrome",
        "Post-Viral Disorder (Disorder)",
        "Covid19"
      ],
      "interventions": [
        {
          "name": "Ruconest",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "IMMUNOe Research Centers",
      "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": 40,
      "start_date": "2021-01-11",
      "completion_date": "2024-07-01",
      "has_results": false,
      "last_update_posted_date": "2025-08-11",
      "last_synced_at": "2026-10-02T15:27:54.392Z",
      "location_count": 1,
      "location_summary": "Centennial, Colorado",
      "locations": [
        {
          "city": "Centennial",
          "state": "Colorado"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04705831"
    },
    {
      "nct_id": "NCT00438815",
      "title": "Open-Label C1 Esterase Inhibitor (C1INH-nf) for the Treatment of Acute Hereditary Angioedema (HAE) Attacks",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Hereditary Angioedema"
      ],
      "interventions": [
        {
          "name": "C1 esterase inhibitor [human] (C1INH-nf)",
          "type": "BIOLOGICAL"
        }
      ],
      "intervention_types": [
        "BIOLOGICAL"
      ],
      "sponsor": "Shire",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "1 Year",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "1 Year and older"
      },
      "enrollment_count": 113,
      "start_date": "2006-09-21",
      "completion_date": "2009-03-31",
      "has_results": true,
      "last_update_posted_date": "2021-06-08",
      "last_synced_at": "2026-10-02T15:27:54.392Z",
      "location_count": 30,
      "location_summary": "Scottsdale, Arizona • Bentonville, Arkansas • Los Angeles, California + 27 more",
      "locations": [
        {
          "city": "Scottsdale",
          "state": "Arizona"
        },
        {
          "city": "Bentonville",
          "state": "Arkansas"
        },
        {
          "city": "Los Angeles",
          "state": "California"
        },
        {
          "city": "San Diego",
          "state": "California"
        },
        {
          "city": "Walnut Creek",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00438815"
    },
    {
      "nct_id": "NCT00432510",
      "title": "Pharmacokinetics of C1 Esterase Inhibitor in Hereditary Angioedema Subjects",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1"
      ],
      "conditions": [
        "Hereditary Angioedema"
      ],
      "interventions": [
        {
          "name": "C1 esterase inhibitor [human] (C1INH-nf)",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Shire",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 27,
      "start_date": "2006-10-09",
      "completion_date": "2007-02-28",
      "has_results": false,
      "last_update_posted_date": "2021-06-03",
      "last_synced_at": "2026-10-02T15:27:54.392Z",
      "location_count": 6,
      "location_summary": "San Diego, California • Walnut Creek, California • Atlanta, Georgia + 3 more",
      "locations": [
        {
          "city": "San Diego",
          "state": "California"
        },
        {
          "city": "Walnut Creek",
          "state": "California"
        },
        {
          "city": "Atlanta",
          "state": "Georgia"
        },
        {
          "city": "Wheaton",
          "state": "Maryland"
        },
        {
          "city": "Hershey",
          "state": "Pennsylvania"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00432510"
    },
    {
      "nct_id": "NCT04530136",
      "title": "Prevention of Severe SARS-CoV-2 Infection in Hospitalized Patients With COVID-19",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Confirmed Coronavirus Disease"
      ],
      "interventions": [
        {
          "name": "Ruconest",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Pharming Technologies B.V.",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "85 Years",
        "sex": "ALL",
        "summary": "18 Years to 85 Years"
      },
      "enrollment_count": 38,
      "start_date": "2020-11-30",
      "completion_date": "2021-12-01",
      "has_results": true,
      "last_update_posted_date": "2024-02-16",
      "last_synced_at": "2026-10-02T15:27:54.392Z",
      "location_count": 4,
      "location_summary": "Marlton, New Jersey • Mount Holly, New Jersey • Ridgewood, New Jersey + 1 more",
      "locations": [
        {
          "city": "Marlton",
          "state": "New Jersey"
        },
        {
          "city": "Mount Holly",
          "state": "New Jersey"
        },
        {
          "city": "Ridgewood",
          "state": "New Jersey"
        },
        {
          "city": "Voorhees Township",
          "state": "New Jersey"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04530136"
    }
  ]
}