{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?condition=Haemophilia+B+Without+Inhibitors",
    "query": {
      "condition": "Haemophilia B Without Inhibitors"
    },
    "page_size": 10
  },
  "pagination": {
    "page": 1,
    "page_size": 10,
    "total_count": 9,
    "total_pages": 1,
    "next_page_url": null,
    "previous_page_url": null
  },
  "source": "remote",
  "last_synced_at": "2026-07-22T00:52:55.307Z",
  "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": "NCT03818529",
      "title": "ATHN 8: Previously Untreated Patients (PUPs) Matter Study",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Hemophilia",
        "Hemophilia A",
        "Hemophilia B",
        "Hemophilia A With Inhibitor",
        "Hemophilia B With Inhibitor",
        "Haemophilia B Without Inhibitor",
        "Haemophilia A Without Inhibitor",
        "Haemophilia"
      ],
      "interventions": [],
      "intervention_types": [],
      "sponsor": "American Thrombosis and Hemostasis Network",
      "sponsor_class": "NETWORK",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "0 Years",
        "maximum_age": "13 Years",
        "sex": "ALL",
        "summary": "0 Years to 13 Years"
      },
      "enrollment_count": 237,
      "start_date": "2018-10-03",
      "completion_date": "2022-12-31",
      "has_results": false,
      "last_update_posted_date": "2023-02-01",
      "last_synced_at": "2026-07-22T00:52:55.307Z",
      "location_count": 27,
      "location_summary": "Phoenix, Arizona • Madera, California • San Diego, California + 24 more",
      "locations": [
        {
          "city": "Phoenix",
          "state": "Arizona"
        },
        {
          "city": "Madera",
          "state": "California"
        },
        {
          "city": "San Diego",
          "state": "California"
        },
        {
          "city": "San Francisco",
          "state": "California"
        },
        {
          "city": "Aurora",
          "state": "Colorado"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03818529"
    },
    {
      "nct_id": "NCT03741881",
      "title": "A Study Following People With Haemophilia A and B, With or Without Inhibitors, When on Usual Treatment (Explorer™6)",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Haemophilia A",
        "Haemophilia A With Inhibitors",
        "Haemophilia B",
        "Haemophilia B With Inhibitors"
      ],
      "interventions": [
        {
          "name": "No treatment given",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "Novo Nordisk A/S",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "12 Years",
        "maximum_age": null,
        "sex": "MALE",
        "summary": "12 Years and older · Male only"
      },
      "enrollment_count": 231,
      "start_date": "2018-12-18",
      "completion_date": "2021-10-25",
      "has_results": false,
      "last_update_posted_date": "2021-11-23",
      "last_synced_at": "2026-07-22T00:52:55.307Z",
      "location_count": 29,
      "location_summary": "Los Angeles, California • Sacramento, California • Aurora, Colorado + 24 more",
      "locations": [
        {
          "city": "Los Angeles",
          "state": "California"
        },
        {
          "city": "Sacramento",
          "state": "California"
        },
        {
          "city": "Aurora",
          "state": "Colorado"
        },
        {
          "city": "Washington D.C.",
          "state": "District of Columbia"
        },
        {
          "city": "Atlanta",
          "state": "Georgia"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03741881"
    },
    {
      "nct_id": "NCT05145127",
      "title": "Open-Label Extension Study of Marstacimab in Hemophilia Participants With or Without Inhibitors",
      "overall_status": "RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Hemophilia A",
        "Hemophilia B"
      ],
      "interventions": [
        {
          "name": "PF-06741086",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Pfizer",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "1 Year",
        "maximum_age": "74 Years",
        "sex": "MALE",
        "summary": "1 Year to 74 Years · Male only"
      },
      "enrollment_count": 245,
      "start_date": "2021-11-17",
      "completion_date": "2030-07-31",
      "has_results": false,
      "last_update_posted_date": "2026-07-01",
      "last_synced_at": "2026-07-22T00:52:55.307Z",
      "location_count": 4,
      "location_summary": "Iowa City, Iowa • New Hyde Park, New York • Philadelphia, Pennsylvania + 1 more",
      "locations": [
        {
          "city": "Iowa City",
          "state": "Iowa"
        },
        {
          "city": "New Hyde Park",
          "state": "New York"
        },
        {
          "city": "Philadelphia",
          "state": "Pennsylvania"
        },
        {
          "city": "Seattle",
          "state": "Washington"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05145127"
    },
    {
      "nct_id": "NCT03417245",
      "title": "A Study of Fitusiran (ALN-AT3SC) in Severe Hemophilia A and B Patients Without Inhibitors",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Hemophilia A",
        "Hemophilia B"
      ],
      "interventions": [
        {
          "name": "fitusiran",
          "type": "DRUG"
        },
        {
          "name": "factor concentrates",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Genzyme, a Sanofi Company",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "12 Years",
        "maximum_age": null,
        "sex": "MALE",
        "summary": "12 Years and older · Male only"
      },
      "enrollment_count": 120,
      "start_date": "2018-03-01",
      "completion_date": "2021-07-14",
      "has_results": true,
      "last_update_posted_date": "2022-03-28",
      "last_synced_at": "2026-07-22T00:52:55.307Z",
      "location_count": 8,
      "location_summary": "Little Rock, Arkansas • Gainesville, Florida • Tampa, Florida + 5 more",
      "locations": [
        {
          "city": "Little Rock",
          "state": "Arkansas"
        },
        {
          "city": "Gainesville",
          "state": "Florida"
        },
        {
          "city": "Tampa",
          "state": "Florida"
        },
        {
          "city": "Chicago",
          "state": "Illinois"
        },
        {
          "city": "New Orleans",
          "state": "Louisiana"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03417245"
    },
    {
      "nct_id": "NCT03938792",
      "title": "Study of the Efficacy and Safety PF-06741086 in Adult and Teenage Participants With Severe Hemophilia A or Moderately Severe to Severe Hemophilia B",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Hemophilia A",
        "Hemophilia B"
      ],
      "interventions": [
        {
          "name": "PF-06741086",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Pfizer",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "12 Years",
        "maximum_age": "74 Years",
        "sex": "MALE",
        "summary": "12 Years to 74 Years · Male only"
      },
      "enrollment_count": 189,
      "start_date": "2020-03-09",
      "completion_date": "2025-04-29",
      "has_results": false,
      "last_update_posted_date": "2025-06-10",
      "last_synced_at": "2026-07-22T00:52:55.307Z",
      "location_count": 4,
      "location_summary": "Tampa, Florida • Iowa City, Iowa • New Hyde Park, New York + 1 more",
      "locations": [
        {
          "city": "Tampa",
          "state": "Florida"
        },
        {
          "city": "Iowa City",
          "state": "Iowa"
        },
        {
          "city": "New Hyde Park",
          "state": "New York"
        },
        {
          "city": "Seattle",
          "state": "Washington"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03938792"
    },
    {
      "nct_id": "NCT03619863",
      "title": "ATHN 7: Hemophilia Natural History Study",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Hemophilia A With Inhibitor",
        "Haemophilia A Without Inhibitor",
        "Hemophilia B With Inhibitor",
        "Haemophilia B Without Inhibitor"
      ],
      "interventions": [],
      "intervention_types": [],
      "sponsor": "American Thrombosis and Hemostasis Network",
      "sponsor_class": "NETWORK",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": null,
        "maximum_age": null,
        "sex": "ALL",
        "summary": "Not listed"
      },
      "enrollment_count": 395,
      "start_date": "2018-10-24",
      "completion_date": "2024-03-31",
      "has_results": false,
      "last_update_posted_date": "2025-02-12",
      "last_synced_at": "2026-07-22T00:52:55.307Z",
      "location_count": 29,
      "location_summary": "Phoenix, Arizona • Los Angeles, California • San Diego, California + 23 more",
      "locations": [
        {
          "city": "Phoenix",
          "state": "Arizona"
        },
        {
          "city": "Los Angeles",
          "state": "California"
        },
        {
          "city": "Los Angeles",
          "state": "California"
        },
        {
          "city": "San Diego",
          "state": "California"
        },
        {
          "city": "Aurora",
          "state": "Colorado"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03619863"
    },
    {
      "nct_id": "NCT01439971",
      "title": "Phase 1 Safety, Pharmacokinetics And Pharmacodynamics Study Of Recombinant Factor VIIa Variant (813d) In Adult Subjects With Hemophilia",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1"
      ],
      "conditions": [
        "Hemophilia A"
      ],
      "interventions": [
        {
          "name": "PF-05280602",
          "type": "BIOLOGICAL"
        }
      ],
      "intervention_types": [
        "BIOLOGICAL"
      ],
      "sponsor": "Catalyst Biosciences",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "64 Years",
        "sex": "MALE",
        "summary": "18 Years to 64 Years · Male only"
      },
      "enrollment_count": 29,
      "start_date": "2011-12",
      "completion_date": "2015-10",
      "has_results": true,
      "last_update_posted_date": "2017-05-12",
      "last_synced_at": "2026-07-22T00:52:55.307Z",
      "location_count": 9,
      "location_summary": "San Diego, California • New Haven, Connecticut • Chicago, Illinois + 3 more",
      "locations": [
        {
          "city": "San Diego",
          "state": "California"
        },
        {
          "city": "New Haven",
          "state": "Connecticut"
        },
        {
          "city": "Chicago",
          "state": "Illinois"
        },
        {
          "city": "Cincinnati",
          "state": "Ohio"
        },
        {
          "city": "Portland",
          "state": "Oregon"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01439971"
    },
    {
      "nct_id": "NCT05135559",
      "title": "A Research Study on How Well Concizumab Works for You if You Have Haemophilia A or B With or Without Inhibitors",
      "overall_status": "ACTIVE_NOT_RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Haemophilia A and B With and Without Inhibitors"
      ],
      "interventions": [
        {
          "name": "Concizumab",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Novo Nordisk A/S",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": null,
        "maximum_age": null,
        "sex": "ALL",
        "summary": "Not listed"
      },
      "enrollment_count": 153,
      "start_date": "2022-03-24",
      "completion_date": "2029-11-02",
      "has_results": false,
      "last_update_posted_date": "2026-06-18",
      "last_synced_at": "2026-07-22T00:52:55.307Z",
      "location_count": 19,
      "location_summary": "San Diego, California • Aurora, Colorado • Orlando, Florida + 14 more",
      "locations": [
        {
          "city": "San Diego",
          "state": "California"
        },
        {
          "city": "Aurora",
          "state": "Colorado"
        },
        {
          "city": "Orlando",
          "state": "Florida"
        },
        {
          "city": "Orlando",
          "state": "Florida"
        },
        {
          "city": "Augusta",
          "state": "Georgia"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05135559"
    },
    {
      "nct_id": "NCT04082429",
      "title": "Research Study to Look at How Well the Drug Concizumab Works in Your Body if You Have Haemophilia Without Inhibitors",
      "overall_status": "ACTIVE_NOT_RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Haemophilia A Without Inhibitors",
        "Haemophilia B Without Inhibitors"
      ],
      "interventions": [
        {
          "name": "Concizumab",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Novo Nordisk A/S",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "12 Years",
        "maximum_age": null,
        "sex": "MALE",
        "summary": "12 Years and older · Male only"
      },
      "enrollment_count": 156,
      "start_date": "2019-11-13",
      "completion_date": "2028-02-21",
      "has_results": true,
      "last_update_posted_date": "2026-06-12",
      "last_synced_at": "2026-07-22T00:52:55.307Z",
      "location_count": 12,
      "location_summary": "Los Angeles, California • Orange, California • Augusta, Georgia + 9 more",
      "locations": [
        {
          "city": "Los Angeles",
          "state": "California"
        },
        {
          "city": "Orange",
          "state": "California"
        },
        {
          "city": "Augusta",
          "state": "Georgia"
        },
        {
          "city": "Indianapolis",
          "state": "Indiana"
        },
        {
          "city": "Iowa City",
          "state": "Iowa"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04082429"
    }
  ]
}