{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=C1+Esterase+Inhibitor+%28Human%29&page=2",
    "query": {
      "intervention": "C1 Esterase Inhibitor (Human)",
      "page": 2
    },
    "page_size": 10
  },
  "pagination": {
    "page": 2,
    "page_size": 10,
    "total_count": 34,
    "total_pages": 4,
    "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=C1+Esterase+Inhibitor+%28Human%29&page=3&page_size=10",
    "previous_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=C1+Esterase+Inhibitor+%28Human%29&page=1&page_size=10"
  },
  "source": "remote",
  "last_synced_at": "2026-10-08T09:19:17.032Z",
  "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": "NCT05121376",
      "title": "A Gene Therapy Study of BMN 331 in Subjects With Hereditary Angioedema",
      "overall_status": "ACTIVE_NOT_RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1",
        "PHASE2"
      ],
      "conditions": [
        "Hereditary Angioedema",
        "HAE"
      ],
      "interventions": [
        {
          "name": "Dose 1 of BMN 331",
          "type": "GENETIC"
        },
        {
          "name": "Dose 2 of BMN 331",
          "type": "GENETIC"
        },
        {
          "name": "Dose 3 of BMN 331",
          "type": "GENETIC"
        },
        {
          "name": "Dose 4 of BMN 331",
          "type": "GENETIC"
        },
        {
          "name": "Dose 5 of BMN 331",
          "type": "GENETIC"
        },
        {
          "name": "Dose 6 of BMN 331",
          "type": "GENETIC"
        },
        {
          "name": "Dose 7 of BMN 331",
          "type": "GENETIC"
        }
      ],
      "intervention_types": [
        "GENETIC"
      ],
      "sponsor": "BioMarin Pharmaceutical",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 44,
      "start_date": "2022-02-15",
      "completion_date": "2028-11",
      "has_results": false,
      "last_update_posted_date": "2024-05-16",
      "last_synced_at": "2026-10-08T09:19:17.032Z",
      "location_count": 13,
      "location_summary": "Birmingham, Alabama • Scottsdale, Arizona • San Diego, California + 10 more",
      "locations": [
        {
          "city": "Birmingham",
          "state": "Alabama"
        },
        {
          "city": "Scottsdale",
          "state": "Arizona"
        },
        {
          "city": "San Diego",
          "state": "California"
        },
        {
          "city": "Colorado Springs",
          "state": "Colorado"
        },
        {
          "city": "Overland Park",
          "state": "Kansas"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05121376"
    },
    {
      "nct_id": "NCT02663687",
      "title": "Phase 1 Study to Assess the Safety, Tolerability, and Pharmacokinetics of Recombinant Human C1 Esterase Inhibitor in Healthy Adult Subjects",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1"
      ],
      "conditions": [
        "Hereditary Angioedema (HAE)"
      ],
      "interventions": [
        {
          "name": "Recombinant human C1 esterase inhibitor",
          "type": "DRUG"
        },
        {
          "name": "Placebo",
          "type": "DRUG"
        },
        {
          "name": "SHP623",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Shire",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "50 Years",
        "sex": "ALL",
        "summary": "18 Years to 50 Years"
      },
      "enrollment_count": 48,
      "start_date": "2016-02-19",
      "completion_date": "2016-12-05",
      "has_results": true,
      "last_update_posted_date": "2021-06-03",
      "last_synced_at": "2026-10-08T09:19:17.032Z",
      "location_count": 1,
      "location_summary": "Miami, Florida",
      "locations": [
        {
          "city": "Miami",
          "state": "Florida"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02663687"
    },
    {
      "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": "2026-10-08T09:19:17.032Z",
      "location_count": 1,
      "location_summary": "Baltimore, Maryland",
      "locations": [
        {
          "city": "Baltimore",
          "state": "Maryland"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01759602"
    },
    {
      "nct_id": "NCT02247739",
      "title": "A Phase 2 HAE Prophylaxis Study With Recombinant Human C1 Inhibitor",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Hereditary Angioedema"
      ],
      "interventions": [
        {
          "name": "Recombinant human C1 inhibitor",
          "type": "BIOLOGICAL"
        },
        {
          "name": "Placebo",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "BIOLOGICAL",
        "OTHER"
      ],
      "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": 32,
      "start_date": "2014-12",
      "completion_date": "2016-09",
      "has_results": true,
      "last_update_posted_date": "2017-12-08",
      "last_synced_at": "2026-10-08T09:19:17.032Z",
      "location_count": 4,
      "location_summary": "Tampa, Florida • St Louis, Missouri • Lake Oswego, Oregon",
      "locations": [
        {
          "city": "Tampa",
          "state": "Florida"
        },
        {
          "city": "Tampa",
          "state": "Florida"
        },
        {
          "city": "St Louis",
          "state": "Missouri"
        },
        {
          "city": "Lake Oswego",
          "state": "Oregon"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02247739"
    },
    {
      "nct_id": "NCT01005888",
      "title": "C1 Esterase Inhibitor (C1INH-nf) for the Prevention 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": 26,
      "start_date": "2005-03-14",
      "completion_date": "2007-08-22",
      "has_results": true,
      "last_update_posted_date": "2021-06-11",
      "last_synced_at": "2026-10-08T09:19:17.032Z",
      "location_count": 16,
      "location_summary": "Scottsdale, Arizona • San Diego, California • Walnut Creek, California + 13 more",
      "locations": [
        {
          "city": "Scottsdale",
          "state": "Arizona"
        },
        {
          "city": "San Diego",
          "state": "California"
        },
        {
          "city": "Walnut Creek",
          "state": "California"
        },
        {
          "city": "Suwanee",
          "state": "Georgia"
        },
        {
          "city": "Honolulu",
          "state": "Hawaii"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01005888"
    },
    {
      "nct_id": "NCT02547220",
      "title": "A Multicenter Study to Evaluate the Efficacy and Safety of Cinryze® for the Treatment of Acute Antibody-mediated Rejection in Participants With Kidney Transplant",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Acute Antibody-Mediated Rejection (AMR)"
      ],
      "interventions": [
        {
          "name": "Cinryze®",
          "type": "BIOLOGICAL"
        },
        {
          "name": "Placebo",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "BIOLOGICAL",
        "DRUG"
      ],
      "sponsor": "Shire",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "70 Years",
        "sex": "ALL",
        "summary": "18 Years to 70 Years"
      },
      "enrollment_count": 39,
      "start_date": "2016-05-20",
      "completion_date": "2019-05-31",
      "has_results": true,
      "last_update_posted_date": "2020-07-13",
      "last_synced_at": "2026-10-08T09:19:17.032Z",
      "location_count": 29,
      "location_summary": "Los Angeles, California • San Francisco, California • Aurora, Colorado + 22 more",
      "locations": [
        {
          "city": "Los Angeles",
          "state": "California"
        },
        {
          "city": "Los Angeles",
          "state": "California"
        },
        {
          "city": "San Francisco",
          "state": "California"
        },
        {
          "city": "Aurora",
          "state": "Colorado"
        },
        {
          "city": "Washington D.C.",
          "state": "District of Columbia"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02547220"
    },
    {
      "nct_id": "NCT02052141",
      "title": "Safety and Efficacy Study of CINRYZE for Prevention of Angioedema Attacks in Children Ages 6-11 With Hereditary Angioedema",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Hereditary Angioedema (HAE)"
      ],
      "interventions": [
        {
          "name": "CINRYZE 500",
          "type": "BIOLOGICAL"
        },
        {
          "name": "CINRYZE 1000",
          "type": "BIOLOGICAL"
        }
      ],
      "intervention_types": [
        "BIOLOGICAL"
      ],
      "sponsor": "Shire",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "6 Years",
        "maximum_age": "11 Years",
        "sex": "ALL",
        "summary": "6 Years to 11 Years"
      },
      "enrollment_count": 12,
      "start_date": "2014-03-20",
      "completion_date": "2017-05-04",
      "has_results": true,
      "last_update_posted_date": "2021-06-03",
      "last_synced_at": "2026-10-08T09:19:17.032Z",
      "location_count": 3,
      "location_summary": "Colorado Springs, Colorado • Las Vegas, Nevada • Eugene, Oregon",
      "locations": [
        {
          "city": "Colorado Springs",
          "state": "Colorado"
        },
        {
          "city": "Las Vegas",
          "state": "Nevada"
        },
        {
          "city": "Eugene",
          "state": "Oregon"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02052141"
    },
    {
      "nct_id": "NCT01188564",
      "title": "Efficacy, Safety and Immunogenicity Study of Recombinant Human C1 Inhibitor for the Treatment of Acute HAE Attacks",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Hereditary Angioedema"
      ],
      "interventions": [
        {
          "name": "rhC1INH",
          "type": "DRUG"
        },
        {
          "name": "Placebo (Saline)",
          "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": 75,
      "start_date": "2011-01",
      "completion_date": "2013-03",
      "has_results": true,
      "last_update_posted_date": "2015-08-07",
      "last_synced_at": "2026-10-08T09:19:17.032Z",
      "location_count": 15,
      "location_summary": "Scottsdale, Arizona • Granada Hills, California • Los Angeles, California + 12 more",
      "locations": [
        {
          "city": "Scottsdale",
          "state": "Arizona"
        },
        {
          "city": "Granada Hills",
          "state": "California"
        },
        {
          "city": "Los Angeles",
          "state": "California"
        },
        {
          "city": "Tampa",
          "state": "Florida"
        },
        {
          "city": "Atlanta",
          "state": "Georgia"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01188564"
    },
    {
      "nct_id": "NCT00168103",
      "title": "Human C1 Esterase Inhibitor (C1-INH) in Subjects With Acute Abdominal or Facial Hereditary Angioedema (HAE) Attacks",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2",
        "PHASE3"
      ],
      "conditions": [
        "Hereditary Angioedema"
      ],
      "interventions": [
        {
          "name": "C1 Esterase Inhibitor",
          "type": "BIOLOGICAL"
        },
        {
          "name": "Placebo",
          "type": "BIOLOGICAL"
        }
      ],
      "intervention_types": [
        "BIOLOGICAL"
      ],
      "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": 126,
      "start_date": "2005-06",
      "completion_date": "2007-12",
      "has_results": true,
      "last_update_posted_date": "2015-03-31",
      "last_synced_at": "2026-10-08T09:19:17.032Z",
      "location_count": 17,
      "location_summary": "Granada Hills, California • Weston, Florida • Atlanta, Georgia + 14 more",
      "locations": [
        {
          "city": "Granada Hills",
          "state": "California"
        },
        {
          "city": "Weston",
          "state": "Florida"
        },
        {
          "city": "Atlanta",
          "state": "Georgia"
        },
        {
          "city": "Idaho Falls",
          "state": "Idaho"
        },
        {
          "city": "Chicago",
          "state": "Illinois"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00168103"
    },
    {
      "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": "2026-10-08T09:19:17.032Z",
      "location_count": 1,
      "location_summary": "Fairfax, Virginia",
      "locations": [
        {
          "city": "Fairfax",
          "state": "Virginia"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03697187"
    }
  ]
}