{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?condition=Haemophilia+B",
    "query": {
      "condition": "Haemophilia B"
    },
    "page_size": 10
  },
  "pagination": {
    "page": 1,
    "page_size": 10,
    "total_count": 146,
    "total_pages": 15,
    "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?condition=Haemophilia+B&page=2&page_size=10",
    "previous_page_url": null
  },
  "source": "remote",
  "last_synced_at": "2026-05-22T08:45:41.562Z",
  "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": "NCT01757405",
      "title": "Recombinant Factor VIIa BI (rFVIIa BI) Treatment of Acute Bleeding Episodes Per an On-demand Regimen",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Hemophilia A",
        "Hemophilia B"
      ],
      "interventions": [
        {
          "name": "Recombinant Factor VIIa BI (rFVIIa BI)",
          "type": "BIOLOGICAL"
        }
      ],
      "intervention_types": [
        "BIOLOGICAL"
      ],
      "sponsor": "Baxalta now part of Shire",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "12 Years",
        "maximum_age": "65 Years",
        "sex": "MALE",
        "summary": "12 Years to 65 Years · Male only"
      },
      "enrollment_count": 40,
      "start_date": "2013-02-20",
      "completion_date": "2014-11-11",
      "has_results": true,
      "last_update_posted_date": "2021-05-11",
      "last_synced_at": "2026-05-22T08:45:41.562Z",
      "location_count": 1,
      "location_summary": "Tampa, Florida",
      "locations": [
        {
          "city": "Tampa",
          "state": "Florida"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01757405"
    },
    {
      "nct_id": "NCT03054389",
      "title": "Non-Interventional Study to Capture the Patient Experience on Gene Therapy for Hemophilia Within the AskBio009-101 Study Through Patient and Investigator Interviews",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Hemophilia B"
      ],
      "interventions": [
        {
          "name": "Qualitative Interview - Participants/ Patients",
          "type": "OTHER"
        },
        {
          "name": "Qualitative Interview - Investigators and Study Coordinators",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "Baxalta now part of Shire",
      "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": 27,
      "start_date": "2017-03-31",
      "completion_date": "2017-06-06",
      "has_results": false,
      "last_update_posted_date": "2021-04-23",
      "last_synced_at": "2026-05-22T08:45:41.562Z",
      "location_count": 1,
      "location_summary": "Cambridge, Massachusetts",
      "locations": [
        {
          "city": "Cambridge",
          "state": "Massachusetts"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03054389"
    },
    {
      "nct_id": "NCT00195221",
      "title": "Study to Describe the Allergic Reactions to Factor IX in Patients With Hemophilia B",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Hemophilia B",
        "Allergic Reactions"
      ],
      "interventions": [],
      "intervention_types": [],
      "sponsor": "Wyeth is now a wholly owned subsidiary of Pfizer",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": null,
        "maximum_age": null,
        "sex": "ALL",
        "summary": "Not listed"
      },
      "enrollment_count": 166,
      "start_date": "2005-02",
      "completion_date": "2007-11",
      "has_results": false,
      "last_update_posted_date": "2007-12-05",
      "last_synced_at": "2026-05-22T08:45:41.562Z",
      "location_count": 15,
      "location_summary": "Phoenix, Arizona • Orange, California • Atlanta, Georgia + 12 more",
      "locations": [
        {
          "city": "Phoenix",
          "state": "Arizona"
        },
        {
          "city": "Orange",
          "state": "California"
        },
        {
          "city": "Atlanta",
          "state": "Georgia"
        },
        {
          "city": "Boise",
          "state": "Idaho"
        },
        {
          "city": "Peoria",
          "state": "Illinois"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00195221"
    },
    {
      "nct_id": "NCT01708564",
      "title": "A Phase I Safety, Pharmacokinetics and Pharmacodynamics Study of Recombinant Factor VIIa in Adult Patients With Hemophilia A or B",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1"
      ],
      "conditions": [
        "Hemophilia"
      ],
      "interventions": [
        {
          "name": "rhFVIIa",
          "type": "BIOLOGICAL"
        }
      ],
      "intervention_types": [
        "BIOLOGICAL"
      ],
      "sponsor": "rEVO Biologics",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "75 Years",
        "sex": "MALE",
        "summary": "18 Years to 75 Years · Male only"
      },
      "enrollment_count": 15,
      "start_date": "2012-10",
      "completion_date": "2013-06",
      "has_results": false,
      "last_update_posted_date": "2013-07-30",
      "last_synced_at": "2026-05-22T08:45:41.562Z",
      "location_count": 2,
      "location_summary": "Sacramento, California • Chicago, Illinois",
      "locations": [
        {
          "city": "Sacramento",
          "state": "California"
        },
        {
          "city": "Chicago",
          "state": "Illinois"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01708564"
    },
    {
      "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": "2026-04-14",
      "last_synced_at": "2026-05-22T08:45:41.562Z",
      "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": "NCT03248141",
      "title": "Understanding Hemophilia A and B Drug Dosage Administration Patterns",
      "overall_status": "TERMINATED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Hemophilia A",
        "Hemophilia B"
      ],
      "interventions": [
        {
          "name": "Hemophilia B standard half-life",
          "type": "DRUG"
        },
        {
          "name": "Hemophilia B extended half-life",
          "type": "DRUG"
        },
        {
          "name": "Hemophilia A standard half-life",
          "type": "DRUG"
        },
        {
          "name": "Hemophilia A extended half-life",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Pfizer",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": null,
        "maximum_age": null,
        "sex": "ALL",
        "summary": "Not listed"
      },
      "enrollment_count": 11,
      "start_date": "2017-09-01",
      "completion_date": "2018-03-14",
      "has_results": true,
      "last_update_posted_date": "2019-05-20",
      "last_synced_at": "2026-05-22T08:45:41.562Z",
      "location_count": 3,
      "location_summary": "Gainesville, Florida • Las Vegas, Nevada • Fort Worth, Texas",
      "locations": [
        {
          "city": "Gainesville",
          "state": "Florida"
        },
        {
          "city": "Las Vegas",
          "state": "Nevada"
        },
        {
          "city": "Fort Worth",
          "state": "Texas"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03248141"
    },
    {
      "nct_id": "NCT01460147",
      "title": "Osteoporosis and MRI Study in Hemophilia",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Bone Mineral Density",
        "Hemophilia A",
        "Hemophilia B"
      ],
      "interventions": [
        {
          "name": "DXA scan + MRI",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "Baxalta now part of Shire",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "25 Years",
        "maximum_age": null,
        "sex": "MALE",
        "summary": "25 Years and older · Male only"
      },
      "enrollment_count": 3,
      "start_date": "2011-10-30",
      "completion_date": "2012-04-13",
      "has_results": false,
      "last_update_posted_date": "2021-04-22",
      "last_synced_at": "2026-05-22T08:45:41.562Z",
      "location_count": 1,
      "location_summary": "Los Angeles, California",
      "locations": [
        {
          "city": "Los Angeles",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01460147"
    },
    {
      "nct_id": "NCT02402829",
      "title": "A Study Comparing Factor Level and Inhibitor Titer Testing Results Drawn From Central Venous Lines and Venipuncture",
      "overall_status": "TERMINATED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Hemophilia A",
        "Factor VIII Deficiency",
        "Hemophilia",
        "Hemophilia B",
        "Factor IX Deficiency"
      ],
      "interventions": [
        {
          "name": "Peripheral Vein Blood draw",
          "type": "PROCEDURE"
        }
      ],
      "intervention_types": [
        "PROCEDURE"
      ],
      "sponsor": "Children's Mercy Hospital Kansas City",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "1 Year",
        "maximum_age": "21 Years",
        "sex": "MALE",
        "summary": "1 Year to 21 Years · Male only"
      },
      "enrollment_count": 3,
      "start_date": "2014-11",
      "completion_date": "2018-11-28",
      "has_results": false,
      "last_update_posted_date": "2021-01-06",
      "last_synced_at": "2026-05-22T08:45:41.562Z",
      "location_count": 1,
      "location_summary": "Kansas City, Missouri",
      "locations": [
        {
          "city": "Kansas City",
          "state": "Missouri"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02402829"
    },
    {
      "nct_id": "NCT01434511",
      "title": "Study of Modified Recombinant Factor VIII (OBI-1) in Subjects With Congenital Hemophilia A",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Hemophilia A"
      ],
      "interventions": [
        {
          "name": "OBI-1",
          "type": "BIOLOGICAL"
        }
      ],
      "intervention_types": [
        "BIOLOGICAL"
      ],
      "sponsor": "Baxalta now part of Shire",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "6 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "6 Years and older"
      },
      "enrollment_count": 1,
      "start_date": "2011-10-03",
      "completion_date": "2013-07-29",
      "has_results": true,
      "last_update_posted_date": "2021-05-14",
      "last_synced_at": "2026-05-22T08:45:41.562Z",
      "location_count": 1,
      "location_summary": "Indianapolis, Indiana",
      "locations": [
        {
          "city": "Indianapolis",
          "state": "Indiana"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01434511"
    },
    {
      "nct_id": "NCT04083781",
      "title": "Research Study to Look at How Well the Drug Concizumab Works in Your Body if You Have Haemophilia With Inhibitors",
      "overall_status": "ACTIVE_NOT_RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Haemophilia A With Inhibitors",
        "Haemophilia B With 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": "MALE",
        "summary": "Male only"
      },
      "enrollment_count": 134,
      "start_date": "2019-10-21",
      "completion_date": "2027-02-21",
      "has_results": true,
      "last_update_posted_date": "2026-03-24",
      "last_synced_at": "2026-05-22T08:45:41.562Z",
      "location_count": 7,
      "location_summary": "Orange, California • Atlanta, Georgia • Indianapolis, Indiana + 4 more",
      "locations": [
        {
          "city": "Orange",
          "state": "California"
        },
        {
          "city": "Atlanta",
          "state": "Georgia"
        },
        {
          "city": "Indianapolis",
          "state": "Indiana"
        },
        {
          "city": "St Louis",
          "state": "Missouri"
        },
        {
          "city": "Charlotte",
          "state": "North Carolina"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04083781"
    }
  ]
}