A Study to Test a Medicine (Fitusiran) for Preventing Bleeds in People With Severe Hemophilia Who Previously Received Preventive Treatment With Emicizumab (NCT06145373)
An Open-label, Single-arm Treatment Study to Investigate the Safety and Tolerability of Switching From Emicizumab to Fitusiran Prophylaxis in Male Participants Aged ≥12 Years of Age With Severe Hemophilia A, With or Without Inhibitors
🩺 Plain-English Summary (8th-Grade Level)
This is an exploratory, single group, Phase 4, study to assess treatment with fitusiran prophylaxis after switching from emicizumab prophylaxis. This study aims to evaluate the safety and tolerability of switching to fitusiran after a transition period from the last dose of emicizumab. The study will be conducted in male participants with severe hemophilia A, with or without inhibitors, aged ≥12 years, who were previously receiving emicizumab prophylaxis. Study details include: * The study duration will be up to approximately 28 months: * There will be an approximately 2-month screening period. * There will be an approximately 2-month period before fitusiran treatment starts (pre-fitusiran treatment period) * The fitusiran treatment duration will be up to 18-months (fitusiran treatment period) * The antithrombin (AT) follow-up (FU) period will be approximately 6 months after the last dose of fitusiran (during which the AT activity level will be monitored at approximately monthly intervals following the final fitusiran dose until AT activity levels return to at least 60%). * The study site visits are scheduled at monthly/ every 2 months intervals of 28 days (4 weeks) / 56 days (8 weeks), respectively, during the fitusiran treatment period.
Who can join: Review the eligibility criteria below.
Location: Children's Hospital Los Angeles- Site Number : 8400005 — Los Angeles, California
Age range: 12 Years
🧪 Interventions in This Study
📋 "Do I Qualify?" — 1-Minute Self Screener
Instant ChecklistFull eligibility criteria are available on the official NIH protocol. View the criteria ↗
📍 All Participating Trial Locations (2 Sites)
- Children's Hospital Los Angeles- Site Number : 8400005 — Los Angeles, California
- Investigational Site Number : 1580001 — Taipei, Podlaskie
📞 Contact the Study Coordinator
Phone: (800) 633-1610
Email: Contact-US@sanofi.com
Coordinator details come directly from the registered NIH protocol. Confirm the study is still recruiting before traveling.
💰 Cost, Insurance & Patient Rights
- 100% Free Items: The investigational treatment and protocol-required procedures are supplied at zero cost by the sponsor.
- Routine Patient Care: Under federal law (ACA § 2709) and many state statutes, routine care costs are covered during participation.
- Voluntary Participation: You may withdraw at any time without affecting your standard medical care.
More studies in Hemophilia A
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- Long-term Safety and Efficacy of Efanesoctocog Alfa (BIVV001) in Previously Treated Patients With Hemophilia A — Los Angeles, California
- Gene Therapy Trial for Platelet Derived Factor VIII Production in Hemophilia A — Milwaukee, Wisconsin
- A Long-term Study of ADYNOVI/ADYNOVATE in Participants With Haemophilia A — Gainesville, Florida
- A Study to Evaluate Impact of Efanesoctocog Alfa on Long-term Joint Health in Participants With Hemophilia A — Gilbert, Arizona
- Study to Evaluate the Efficacy and Safety of PF-07055480 / Giroctocogene Fitelparvovec Gene Therapy in Moderately Severe to Severe Hemophilia A Adults — Mountain View, California
Explore by condition: All Hemophilia A clinical trials
💡 How to Participate
- Check the checklist above to see if you may qualify.
- Contact the study coordinator using the phone/email above.
- Ask about the visit schedule, what is covered at no cost, and any travel support.
- Confirm with your own doctor before making a decision.