Clinical trial Recruiting at 15 sites Phase 4 Interventional Ages 12 to 100

Using SEVENFACT® to treat bleeding in hemophilia patients with inhibitors

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

Run by American Thrombosis and Hemostasis Network · NCT04647227 · Data updated 2026-11-12

This study is testing if SEVENFACT® can safely help people aged 12 and older with hemophilia who have inhibitors stop bleeding during episodes.

More Hemophilia A With Inhibitor trials

Quick facts

PhasePhase 4
Study typeInterventional
Ages12 Years to 100 Years
SexAll
Enrollment55 (estimated)
SponsorAmerican Thrombosis and Hemostasis Network
Research network
Drugs / interventionsemicizumab
Locations21 sites (Phoenix, Arizona and 20 other locations)
StatusRecruiting
StartedJune 28, 2021
Main results expectedSeptember 30, 2026
Study endsMarch 31, 2027
Registry record updatedJanuary 12, 2026
Trial IDNCT04647227 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Ideal candidates are individuals aged 12 and older diagnosed with Hemophilia A or B with inhibitors, either on prophylactic treatment or at risk of breakthrough bleeding.

Probably not a fit

Patients with additional bleeding disorders or known hypersensitivity to SEVENFACT® or its components may not benefit from this study.

A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.

What this trial studies

This is a Phase IV, multi-center, open-label safety study evaluating the use of SEVENFACT® in treating bleeding episodes in patients aged 12 and older with Hemophilia A or B who have inhibitors. Participants may be on long-term prophylactic treatment or not, and the study aims to assess the safety of SEVENFACT® in controlling breakthrough bleeding events. The study will follow participants longitudinally for up to four years, with a target enrollment of 28 to 55 participants across multiple sites in the U.S.

Why it matters

Potential benefit: If successful, this study could provide a new effective treatment option for managing bleeding events in hemophilia patients with inhibitors.

How similar studies have gone: Other studies have shown promise in using similar approaches for treating bleeding events in hemophilia, but this specific application of SEVENFACT® is being evaluated for the first time.

Who can join: the full rules

Show full inclusion / exclusion criteria
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.

Where it's running

  • Arkansas Center for Bleeding Disorders
    Little Rock, Arkansas, United States
    Recruiting
  • Orthopaedic Institute for Children
    Los Angeles, California, United States
    Recruiting
  • University of California at Davis UC Davis Hemostasis and Thrombosis Center
    Sacramento, California, United States
    Recruiting
  • Hemophilia of Georgia Center for Bleeding and Clotting Disorders of Emory, Adult Division
    Atlanta, Georgia, United States
    Recruiting
  • Willett Children's Hospital at Memorial University Medical Center
    Savannah, Georgia, United States
    Recruiting
  • Massachusetts General Hospital Comprehensive Hemophilia and Thrombosis Treatment Center
    Boston, Massachusetts, United States
    Recruiting
Show 15 more locations
  • Children's Hospital of Michigan
    Detroit, Michigan, United States
    Recruiting
  • Henry Ford Health System
    Detroit, Michigan, United States
    Recruiting
  • MSU Center for Bleeding and Clotting Disorders
    Lansing, Michigan, United States
    Recruiting
  • Kansas City Regional Hemophilia Center
    Kansas City, Missouri, United States
    Recruiting
  • Northwell Health, Long Island Jewish
    New Hyde Park, New York, United States
    Recruiting
  • University Hospitals Health System Cleveland
    Cleveland, Ohio, United States
    Recruiting
  • Oklahoma Center for Bleeding and Clotting Disorders
    Oklahoma City, Oklahoma, United States
    Recruiting
  • Vanderbilt University Medical Center
    Nashville, Tennessee, United States
    Recruiting
  • Gulf States Hemophilia and Thrombophilia Center-University of Texas Health Science Center @Houston
    Houston, Texas, United States
    Recruiting
  • Arizona Hemophilia and Thrombosis Center at Phoenix Children's Hospital
    Phoenix, Arizona, United States
    Completed
  • Children's National Hemophilia Center
    Washington D.C., District of Columbia, United States
    Completed
  • Arnold Palmer Hospital for Children - The Haley Center for Children's Cancer and Blood Disorders
    Orlando, Florida, United States
    Completed
  • Center for Bleeding and Clotting Disorders, University of Minnesota
    Minneapolis, Minnesota, United States
    Not yet recruiting
  • Mayo Comprehensive Hemophilia Center
    Rochester, Minnesota, United States
    Completed
  • Brody School of Medicine at East Carolina University
    Greenville, North Carolina, United States
    Not yet recruiting

Study contacts

  • Principal investigator: Tammuella Chrisentery-Singleton, MD — American Thrombosis and Hemostasis Network
  • Study coordinator: Carol Fedor, ND, RN, CCRC
  • Email: cfedor@athn.org
  • Phone: (800)-360-2846

Similar studies

Other studies for the same condition or treatment. Recruiting studies are listed first.

How to take part

  1. Review the eligibility criteria above with your treating physician.
  2. Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
  3. Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.
Last reviewed 2026-11-14 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.