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U.S. FDA Approves Pfizer’s HYMPAVZI for the Treatment of Two Additional Hemophilia A or B Patient Populations with Significant Medical Need

$PFEPress releaseJun 8, 2026, 6:45 AM ETRead the release

The FDA approved an expanded indication for Pfizer’s HYMPAVZI to treat hemophilia A or B patients aged 12 and older with inhibitors, as well as pediatric patients aged 6 to 11 with or without inhibitors. This approval is supported by Phase 3 trial data showing a 93% reduction in annualized bleeding rates for inhibitor-positive patients compared to standard bypassing agents.

Key figures

Drug Name
HYMPAVZI (marstacimab-hncq)
Phase Of Trial
Phase 3
Abrr bypassing agents
19.8
Abrr hympavzi inhibitors
1.4
Abrr pediatric inhibitors
1.4
Abrr reduction inhibitors
93%
Global hemophilia patients
800,000
Abrr pediatric no inhibitors
1.8

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