BEQVEZ is prescribed for adults with moderate to severe hemophilia B, a rare inherited bleeding disorder caused by low levels of clotting factor IX. People with hemophilia B can experience serious bleeding episodes, including bleeding into joints, muscles, and internal organs. Many patients require regular factor IX infusions throughout their lives to prevent dangerous bleeding. BEQVEZ is important because it is a one-time gene therapy designed to help the body produce its own factor IX instead of relying on ongoing replacement therapy. This treatment offers a new long-term approach for eligible patients with hemophilia B. The FDA approved BEQVEZ on May 13, 2026.




