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Updated May 2026 · ClinicalTrials.gov

RECRUITINGPhase 4INTERVENTIONAL

SEVENFACT® for Bleeding Events in Hemophilia With Inhibitors

Safety of SEVENFACT® for the Treatment of Bleeding Events in Patients With Hemophilia A or B With Inhibitors

SEVENFACT® for Bleeding Events in Hemophilia With Inhibitors (NCT04647227) is a Phase 4 interventional studying Hemophilia A With Inhibitor and Hemophilia B With Inhibitor, sponsored by American Thrombosis and Hemostasis Network. RECRUITING as of the most recent ClinicalTrials.gov update. Talk to your doctor before contacting the trial site.

Important: This information is not medical advice. Talk to your doctor about whether a clinical trial is right for you.

About This Trial

Phase IV multi-center, US-centric, open-label, safety study enrolling participants with Hemophilia A or B with inhibitors, 12 years of age and older, who are either on long term prophylactic treatment (e.g., emicizumab) at risk of experiencing a breakthrough bleeding event (BE), or who are not on prophylactic treatment who may need to control a BE.

What Stage of Research Is This?

Phase 4 studies happen after a treatment has been approved by the FDA. They monitor long-term safety, real-world effectiveness, and any rare side effects that only emerge in larger populations over longer periods. Phase 4 results sometimes lead to label changes, additional warnings, or — rarely — withdrawal of approval.

This trial is currently recruiting participants. The sponsor has registered the study with ClinicalTrials.gov as actively enrolling, which means new applicants who meet the eligibility criteria can be considered for screening. Trial status can change between updates — confirm current recruiting status with the study contact before traveling for a screening visit.

Target enrollment of 55 participants puts this in the typical range for a Phase 2-style efficacy study or a moderate Phase 3 trial in a focused Hemophilia A With Inhibitor subpopulation. At this scale, the study has enough statistical power to detect a clear treatment effect but is not the largest cohort in the field.

Who May Be Eligible (Plain English)

Who May Qualify: 1. Have a diagnosis of hemophilia A or B with inhibitors. 2. Be 12 years of age and older 3. Be capable of understanding and willing to comply with the conditions of the protocol or have a legal guardian who is capable of understanding and complying with the conditions of the protocol 4. Have read, understood, and documented written willing to sign a consent form/assent 5. Be able to provide medical evidence through prior medical history of previous inhibitor levels 6. Be willing and able to use the ATHN mobile application or a paper diary to document BEs and medication usage Who Should NOT Join This Trial: 1. Have a disorder of hemostasis in addition to Hemophilia A or B 2. Have a known or suspected intolerance or hypersensitivity to SEVENFACT® or its ingredients 3. Have a known allergy or hypersensitivity to rabbits or rabbit proteins 4. Are receiving prophylactic treatment for bleeding with a drug or biologic that is not approved for this use by the FDA 5. Have had implantation of an investigational medical device within the prior 6 months 6. Have received an investigational drug within 30 days of the baseline visit 7. Have an elective surgical procedure planned during the duration of their participation in the study\* 8. Have any life-threatening disease, or other disease or condition which, in the investigator's judgment, could pose a potential hazard to the patient or interfere with study participation or study outcome (e.g., a history of non responsiveness to bypassing products or thromboembolic disease) - Should a participant require an unplanned surgery, the participant will not be withdrawn from the study unless the investigator deems it necessary. Instead, the participant will receive standard of care treatment as determined by the attending physician. If the participant is not withdrawn from the study, the participant's participation in the study will be paused until the investigator feels it is safe for them to continue. Always talk to your doctor about whether this trial is right for you.

These are translations of the protocol\'s inclusion and exclusion criteria, simplified for patients and caregivers. The original clinical text appears below. Eligibility is ultimately confirmed by the trial site\'s screening process — this summary is a starting point for a conversation with your doctor, not a final determination.

Original Eligibility Criteria

View original clinical language
Inclusion Criteria: 1. Have a diagnosis of hemophilia A or B with inhibitors. 2. Be 12 years of age and older 3. Be capable of understanding and willing to comply with the conditions of the protocol or have a legal guardian who is capable of understanding and complying with the conditions of the protocol 4. Have read, understood, and documented written informed consent/assent 5. Be able to provide medical evidence through prior medical history of previous inhibitor levels 6. Be willing and able to use the ATHN mobile application or a paper diary to document BEs and medication usage Exclusion Criteria: 1. Have a disorder of hemostasis in addition to Hemophilia A or B 2. Have a known or suspected intolerance or hypersensitivity to SEVENFACT® or its ingredients 3. Have a known allergy or hypersensitivity to rabbits or rabbit proteins 4. Are receiving prophylactic treatment for bleeding with a drug or biologic that is not approved for this use by the FDA 5. Have had implantation of an investigational medical device within the prior 6 months 6. Have received an investigational drug within 30 days of the baseline visit 7. Have an elective surgical procedure planned during the duration of their participation in the study\* 8. Have any life-threatening disease, or other disease or condition which, in the investigator's judgment, could pose a potential hazard to the patient or interfere with study participation or study outcome (e.g., a history of non responsiveness to bypassing products or thromboembolic disease) * Should a participant require an unplanned surgery, the participant will not be withdrawn from the study unless the investigator deems it necessary. Instead, the participant will receive standard of care treatment as determined by the attending physician. If the participant is not withdrawn from the study, the participant's participation in the study will be paused until the investigator feels it is safe for them to continue.

Treatments Being Tested

DRUG

coagulation factor VIIa [recombinant]-jncw

a transgenically produced, activated, recombinant, human factor VII (rhFVIIa) protein with the brand name of SEVENFACT®. This protein is a clotting factor in the coagulation cascade that is produced in and purified from the milk of transgenic rabbits. SEVENFACT is approved for the treatment and control of bleeding episodes occurring in adults and adolescents (12 years of age and older) with hemophilia A or B with inhibitors.

Locations (20)

Trial sites listed on ClinicalTrials.gov for this study. Site activation status can vary — confirm with the specific site before traveling for a screening visit.

Arizona Hemophilia and Thrombosis Center at Phoenix Children's Hospital
Phoenix, Arizona, United States
Arkansas Center for Bleeding Disorders
Little Rock, Arkansas, United States
Orthopaedic Institute for Children
Los Angeles, California, United States
University of California at Davis UC Davis Hemostasis and Thrombosis Center
Sacramento, California, United States
Children's National Hemophilia Center
Washington D.C., District of Columbia, United States
Arnold Palmer Hospital for Children - The Haley Center for Children's Cancer and Blood Disorders
Orlando, Florida, United States
Hemophilia of Georgia Center for Bleeding and Clotting Disorders of Emory, Adult Division
Atlanta, Georgia, United States
Willett Children's Hospital at Memorial University Medical Center
Savannah, Georgia, United States
Massachusetts General Hospital Comprehensive Hemophilia and Thrombosis Treatment Center
Boston, Massachusetts, United States
Children's Hospital of Michigan
Detroit, Michigan, United States
Henry Ford Health System
Detroit, Michigan, United States
MSU Center for Bleeding and Clotting Disorders
Lansing, Michigan, United States
Center for Bleeding and Clotting Disorders, University of Minnesota
Minneapolis, Minnesota, United States
Mayo Comprehensive Hemophilia Center
Rochester, Minnesota, United States
Kansas City Regional Hemophilia Center
Kansas City, Missouri, United States
Northwell Health, Long Island Jewish
New Hyde Park, New York, United States
Brody School of Medicine at East Carolina University
Greenville, North Carolina, United States
University Hospitals Health System Cleveland
Cleveland, Ohio, United States
Oklahoma Center for Bleeding and Clotting Disorders
Oklahoma City, Oklahoma, United States
Vanderbilt University Medical Center
Nashville, Tennessee, United States

How to Talk to Your Doctor About This Trial

Bring the printable summary of this trial — including the NCT ID (NCT04647227), the sponsor (American Thrombosis and Hemostasis Network), and the key eligibility criteria — to your next appointment. Your doctor can review the inclusion and exclusion criteria against your medical history, lab values, and current treatments to assess whether you are likely to qualify. They can also help you weigh whether trial participation makes sense alongside your existing care plan.

Useful questions to walk through together: What does the trial protocol require beyond standard care? How long is the active treatment phase, and how long is follow-up? Are there study visits at sites I can reach? Who pays for the trial-specific procedures, and who pays for standard-of-care portions? See our 25 questions to ask about clinical trials guide for a more complete checklist.

Authoritative Sources

The official record for this trial lives on ClinicalTrials.gov — the federal registry maintained by the National Library of Medicine at NIH. For background on how this trial fits into the FDA approval pathway, see the FDA drug approval process. For oncology-specific guidance for patients considering trials, the National Cancer Institute publishes patient-oriented overviews. International trial registries are aggregated by the WHO ICTRP.

Frequently Asked Questions

What is the NCT04647227 clinical trial studying?

Phase IV multi-center, US-centric, open-label, safety study enrolling participants with Hemophilia A or B with inhibitors, 12 years of age and older, who are either on long term prophylactic treatment (e.g., emicizumab) at risk of experiencing a breakthrough bleeding event (BE), or who are not on prophylactic treatment who may need to control a BE. The full protocol is registered on ClinicalTrials.gov and includes the primary outcome measures, eligibility criteria, and study endpoints.

Who can participate in NCT04647227?

Eligibility for this trial depends on the specific inclusion and exclusion criteria set by the sponsor. The plain-English summary above translates the most important criteria into accessible language; the official clinical text is preserved in the collapsible section underneath. Whether you fit any specific trial is a medical decision your doctor needs to confirm — bring the trial information to your treating physician for a full review against your medical history.

How do I contact the trial site for NCT04647227?

Contact information registered with ClinicalTrials.gov is shown in the sidebar of this page. Before reaching out, confirm with your treating physician that this trial is appropriate for your situation. The trial site will then walk you through the screening process to determine final eligibility.

Is participating in a clinical trial safe?

Clinical trials in the United States are regulated by the FDA and overseen by Institutional Review Boards (IRBs) that review the protocol for safety. Risk varies by trial — Phase 1 studies test new treatments in humans for the first time, while Phase 3 trials use treatments that have already passed earlier safety screening. The informed consent document for any specific trial details the known risks and what to expect. Discuss those risks with your physician before deciding whether to participate.

Where can I verify the data on this page?

Every detail on this page comes directly from the ClinicalTrials.gov API. Click "View on ClinicalTrials.gov" in the sidebar to see the official, unmodified record. The federal record is always authoritative; this page is a structured presentation with a plain-English eligibility translation. For background on how clinical trials are regulated, see the FDA drug approval process documentation.

How This Page Is Built

Every field on this page is pulled directly from the ClinicalTrials.gov API v2 — no estimates, no proxies. The plain-English eligibility translation is generated from the original protocol text and reviewed for fidelity to the underlying clinical criteria. The original clinical text remains visible in the collapsible section above so users and clinicians can verify the translation. Read the full methodology for the data pipeline and known limitations.

Source: ClinicalTrials.gov API v2 record for NCT04647227. Maintained by the National Library of Medicine at NIH. Public domain. Cite as: "TrialFinderData. NCT04647227. Data: ClinicalTrials.gov."

Medical disclaimer: This page is informational, not medical advice. Talk to your doctor about whether a clinical trial is right for you.

Last updated 2026-05-08 · Data from ClinicalTrials.gov.