{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Fitusiran",
    "query": {
      "intervention": "Fitusiran"
    },
    "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": "2026-09-02T12:17:11.838Z",
  "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": "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": "2026-09-02T12:17:11.838Z",
      "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": "NCT03974113",
      "title": "Fitusiran Prophylaxis in Male Pediatric Subjects Aged 1 to Less Than 12 Years With Hemophilia A or B",
      "overall_status": "ACTIVE_NOT_RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2",
        "PHASE3"
      ],
      "conditions": [
        "Hemophilia"
      ],
      "interventions": [
        {
          "name": "Fitusiran",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Genzyme, a Sanofi Company",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "1 Year",
        "maximum_age": "11 Years",
        "sex": "MALE",
        "summary": "1 Year to 11 Years · Male only"
      },
      "enrollment_count": 32,
      "start_date": "2020-01-28",
      "completion_date": "2026-12-15",
      "has_results": false,
      "last_update_posted_date": "2026-06-22",
      "last_synced_at": "2026-09-02T12:17:11.838Z",
      "location_count": 4,
      "location_summary": "Los Angeles, California • Hackensack, New Jersey • Cleveland, Ohio + 1 more",
      "locations": [
        {
          "city": "Los Angeles",
          "state": "California"
        },
        {
          "city": "Hackensack",
          "state": "New Jersey"
        },
        {
          "city": "Cleveland",
          "state": "Ohio"
        },
        {
          "city": "Hershey",
          "state": "Pennsylvania"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03974113"
    },
    {
      "nct_id": "NCT03754790",
      "title": "Long-term Safety and Efficacy Study of Fitusiran in Patients With Hemophilia A or B, With or Without Inhibitory Antibodies to Factor VIII or IX",
      "overall_status": "ACTIVE_NOT_RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Hemophilia"
      ],
      "interventions": [
        {
          "name": "Fitusiran",
          "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": 281,
      "start_date": "2019-01-09",
      "completion_date": "2026-11-05",
      "has_results": false,
      "last_update_posted_date": "2025-12-17",
      "last_synced_at": "2026-09-02T12:17:11.838Z",
      "location_count": 10,
      "location_summary": "Phoenix, Arizona • Los Angeles, California • Orange, California + 7 more",
      "locations": [
        {
          "city": "Phoenix",
          "state": "Arizona"
        },
        {
          "city": "Los Angeles",
          "state": "California"
        },
        {
          "city": "Orange",
          "state": "California"
        },
        {
          "city": "Jacksonville",
          "state": "Florida"
        },
        {
          "city": "Tampa",
          "state": "Florida"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03754790"
    },
    {
      "nct_id": "NCT03417102",
      "title": "A Study of Fitusiran (ALN-AT3SC) in Severe Hemophilia A and B Patients With Inhibitors",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Hemophilia A",
        "Hemophilia B"
      ],
      "interventions": [
        {
          "name": "fitusiran",
          "type": "DRUG"
        },
        {
          "name": "Bypassing agents",
          "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": 60,
      "start_date": "2018-02-14",
      "completion_date": "2021-06-23",
      "has_results": true,
      "last_update_posted_date": "2022-03-28",
      "last_synced_at": "2026-09-02T12:17:11.838Z",
      "location_count": 12,
      "location_summary": "Phoenix, Arizona • Los Angeles, California • Orange, California + 9 more",
      "locations": [
        {
          "city": "Phoenix",
          "state": "Arizona"
        },
        {
          "city": "Los Angeles",
          "state": "California"
        },
        {
          "city": "Orange",
          "state": "California"
        },
        {
          "city": "San Diego",
          "state": "California"
        },
        {
          "city": "Gainesville",
          "state": "Florida"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03417102"
    },
    {
      "nct_id": "NCT02554773",
      "title": "An Open-label Extension Study of an Investigational Drug, Fitusiran, in Patients With Moderate or Severe Hemophilia A or B",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1",
        "PHASE2"
      ],
      "conditions": [
        "Hemophilia A",
        "Hemophilia B"
      ],
      "interventions": [
        {
          "name": "Fitusiran (SAR439774)",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Genzyme, a Sanofi Company",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "MALE",
        "summary": "18 Years and older · Male only"
      },
      "enrollment_count": 34,
      "start_date": "2015-09-18",
      "completion_date": "2023-03-21",
      "has_results": true,
      "last_update_posted_date": "2024-06-05",
      "last_synced_at": "2026-09-02T12:17:11.838Z",
      "location_count": 2,
      "location_summary": "Ann Arbor, Michigan • Pittsburgh, Pennsylvania",
      "locations": [
        {
          "city": "Ann Arbor",
          "state": "Michigan"
        },
        {
          "city": "Pittsburgh",
          "state": "Pennsylvania"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02554773"
    },
    {
      "nct_id": "NCT03549871",
      "title": "A Study of Fitusiran in Severe Hemophilia A and B Patients Previously Receiving Factor or Bypassing Agent Prophylaxis",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Hemophilia"
      ],
      "interventions": [
        {
          "name": "Fitusiran",
          "type": "DRUG"
        },
        {
          "name": "BPA prophylaxis",
          "type": "DRUG"
        },
        {
          "name": "Factor (FVIII or FIX) prophylaxis",
          "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": 80,
      "start_date": "2018-07-25",
      "completion_date": "2022-03-25",
      "has_results": true,
      "last_update_posted_date": "2023-02-06",
      "last_synced_at": "2026-09-02T12:17:11.838Z",
      "location_count": 1,
      "location_summary": "Los Angeles, California",
      "locations": [
        {
          "city": "Los Angeles",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03549871"
    },
    {
      "nct_id": "NCT05662319",
      "title": "A Study to Test a Medicine (Fitusiran) Injected Under the Skin for Preventing Bleeding Episodes in Male Adolescent or Adult Participants With Severe Hemophilia",
      "overall_status": "ACTIVE_NOT_RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Hemophilia"
      ],
      "interventions": [
        {
          "name": "Fitusiran",
          "type": "DRUG"
        },
        {
          "name": "Clotting factor concentrates (CFC) or bypassing agents (BPA)",
          "type": "DRUG"
        },
        {
          "name": "Antithrombin concentrate (ATIIIC)",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Sanofi",
      "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": 91,
      "start_date": "2023-02-01",
      "completion_date": "2029-01-25",
      "has_results": false,
      "last_update_posted_date": "2026-02-04",
      "last_synced_at": "2026-09-02T12:17:11.838Z",
      "location_count": 8,
      "location_summary": "Orange, California • Minneapolis, Minnesota • Hackensack, New Jersey + 5 more",
      "locations": [
        {
          "city": "Orange",
          "state": "California"
        },
        {
          "city": "Minneapolis",
          "state": "Minnesota"
        },
        {
          "city": "Hackensack",
          "state": "New Jersey"
        },
        {
          "city": "New Hyde Park",
          "state": "New York"
        },
        {
          "city": "Cleveland",
          "state": "Ohio"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05662319"
    },
    {
      "nct_id": "NCT06145373",
      "title": "A Study to Test a Medicine (Fitusiran) for Preventing Bleeds in People With Severe Hemophilia Who Previously Received Preventive Treatment With Emicizumab",
      "overall_status": "RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE4"
      ],
      "conditions": [
        "Hemophilia A"
      ],
      "interventions": [
        {
          "name": "Fitusiran (SAR439774)",
          "type": "DRUG"
        },
        {
          "name": "Clotting factor concentrates (CFC) or bypassing agents (BPA)",
          "type": "BIOLOGICAL"
        },
        {
          "name": "Antithrombin concentrate (ATIIIC)",
          "type": "BIOLOGICAL"
        },
        {
          "name": "Emicizumab",
          "type": "BIOLOGICAL"
        }
      ],
      "intervention_types": [
        "DRUG",
        "BIOLOGICAL"
      ],
      "sponsor": "Sanofi",
      "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": 20,
      "start_date": "2024-03-01",
      "completion_date": "2030-01-30",
      "has_results": false,
      "last_update_posted_date": "2026-06-02",
      "last_synced_at": "2026-09-02T12:17:11.838Z",
      "location_count": 1,
      "location_summary": "Los Angeles, California",
      "locations": [
        {
          "city": "Los Angeles",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT06145373"
    },
    {
      "nct_id": "NCT07285460",
      "title": "A Study to Investigate the Efficacy and Safety of Fitusiran Prophylaxis in Male Participants Aged 1 to Less Than 12 Years With Hemophilia A or B",
      "overall_status": "RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Hemophilia"
      ],
      "interventions": [
        {
          "name": "Fitusiran",
          "type": "DRUG"
        },
        {
          "name": "Clotting factor concentrates (CFC) or bypassing agents (BPA)",
          "type": "BIOLOGICAL"
        },
        {
          "name": "Antithrombin concentrate (ATIIIC)",
          "type": "BIOLOGICAL"
        }
      ],
      "intervention_types": [
        "DRUG",
        "BIOLOGICAL"
      ],
      "sponsor": "Sanofi",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "1 Year",
        "maximum_age": "11 Years",
        "sex": "MALE",
        "summary": "1 Year to 11 Years · Male only"
      },
      "enrollment_count": 85,
      "start_date": "2025-12-18",
      "completion_date": "2031-12-30",
      "has_results": false,
      "last_update_posted_date": "2026-08-17",
      "last_synced_at": "2026-09-02T12:17:11.838Z",
      "location_count": 5,
      "location_summary": "Los Angeles, California • Orange, California • Las Vegas, Nevada + 2 more",
      "locations": [
        {
          "city": "Los Angeles",
          "state": "California"
        },
        {
          "city": "Orange",
          "state": "California"
        },
        {
          "city": "Las Vegas",
          "state": "Nevada"
        },
        {
          "city": "Hackensack",
          "state": "New Jersey"
        },
        {
          "city": "Dallas",
          "state": "Texas"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT07285460"
    }
  ]
}