Nonacog Alfa for Prophylaxis and Treatment of Bleeding Episodes in Previously Treated Patients with Moderately Severe or Severe Hemophilia B in India

Abstract

Purpose: Hemophilia B is an X-linked congenital bleeding disorder caused by a deficiency of coagulation factor IX (FIX) clotting activity. This study evaluated safety and efficacy of Nonacog Alfa, a recombinant human blood coagulation FIX replacement product, in males aged 12–65 years with hemophilia B (FIX activity≤2%) with or without inhibitors in India.

Methods: In this multicenter, open-label, post-approval phase 4 study, participants were treated for up to 8 weeks, with up to a 4-week screening period and a subsequent posttreatment 28-day safety observation period. Intravenous
nonacog alfa 40 IU/kg (range 13–78 IU/kg) was administered at intervals of 3–4 days, in accordance with the approved local product document.

Results: A total of 25 participants were enrolled and completed the study. No participants developed FIX inhibitors during the study, experienced treatment-related adverse events (AEs) or serious AEs, or developed a thrombotic
event and/or hypersensitivity reaction. No participants experienced bleeding events requiring on-demand treatment with Nonacog Alfa. Seventeen bleeding episodes (16 spontaneous and 1 traumatic) were reported in 10 participants; all
occurred post treatment, with the exception of a minor gum bleeding event, and were managed without treatment. The mean (SD) annualized total factor consumption (TFC) per patient was 224,582 (75,527) IU; the mean (SD) annualized
TFC by weight per patient was 3639 (573) IU/kg.

Conclusion: Nonacog alfa was safe and effective for the prevention of hemorrhagic episodes in Indian males with congenital, severe hemophilia B. No participants developed FIX inhibitors, and no new safety signals were reported.

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Identifiers

ORCID for Savita Rangarajan: orcid.org/0000-0001-7367-133X

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