Bleed treatment with eptacog beta (rFVIIa) results in a low incidence of rebleeding in adult and adolescent patients with haemophilia A or B with inhibitors.

Introduction: Eptacog beta is a novel human recombinant FVIIa approved for use in the United States, European Union, United Kingdom and Mexico for the treatment and control of bleeding in patients with haemophilia A or B with inhibitors (≥12 years). It is also indicated for perioperative care in the same patient population in Europe and the United Kingdom.

Aim: To assess the incidence of rebleeding and review treatment outcomes in subjects with haemophilia with inhibitors enrolled in the phase 3 PERSEPT 1 clinical trial.

Methods: To treat mild/moderate bleeding episodes (BEs), subjects administered an initial 75  or 225µg/kg dose of eptacog beta, followed (if necessary) by additional 75µg/kg doses at predefined intervals until bleed control. This analysis used subject-reported rebleeding to determine a rebleeding incidence for the first 24 h. Rebleeding through later timepoints was an exploratory, intention-to-treat analysis of bleed treatment data.

Results: Four hundred and sixty-five BEs were analysed. Through 24 h, the proportion of rebleeds was 0% (initial 75µg/kg dose) and 0.5% (initial 225µg/kg dose). Through 48 h, the proportion of rebleeds was 3.2% (75µg/kg initial dose) and 5.6% (225µg/kg initial dose); the difference between initial dose strategies was not statistically significant. The majority of rebleeds were controlled with a single dose of eptacog beta and no subject who treated a rebleed required hospitalization.

Conclusion: Subjects with haemophilia with inhibitors who used eptacog beta to treat mild/moderate BEs experienced a low incidence of rebleeding. Rebleeds that did occur were effectively controlled with eptacog beta (median, one dose) without the need for hospitalization.