| Hemophilia B
BeneFix vs Hympavzi
Side-by-side clinical, coverage, and cost comparison for hemophilia b.Deep comparison between: Benefix vs Hympavzi with Prescriber.AI
AI compares prescribing info and payer-specific access barriers across 1,200+ formularies. Here's a preview of what prescribers are already asking.Safety signalsHympavzi has a higher rate of injection site reactions vs Benefix based on FDA-approved prescribing information
Coverage gaps3 major payers require step therapy for Hympavzi but not Benefix, including UnitedHealthcare
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Category
Benefix
Hympavzi
At A Glance
IV infusion
Once weekly
Recombinant factor IX
SC injection
Weekly
TFPI antagonist
Indications
- Hemophilia B
- Hemophilia A
- Hemophilia B
Dosing
Hemophilia B - On-demand and Perioperative Management IV infusion; dose (IU) = body weight (kg) x desired factor IX increase (IU/dL) x reciprocal of observed recovery; minor hemorrhage: target 20-30 IU/dL every 12-24 hours for 1-2 days; moderate: 25-50 IU/dL every 12-24 hours for 2-7 days; major/surgery: 50-100 IU/dL every 12-24 hours for 7-10 days.
Hemophilia B - Routine Prophylaxis 100 IU/kg IV infusion once weekly; children under 12 years may require more frequent or higher doses.
Hemophilia A, Hemophilia B Loading dose 300 mg SC (two 150 mg injections); maintenance 150 mg SC once weekly starting one week after loading dose; consider dose adjustment to 300 mg SC weekly in patients >=50 kg with inadequate bleeding control.
Contraindications
- Life-threatening immediate hypersensitivity reactions, including anaphylaxis, to BeneFIX or its components, including hamster protein
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Adverse Reactions
Most common (>5%) Fever, cough, headache, dizziness, nausea, injection site reaction, injection site pain, rash, hives
Serious Systemic hypersensitivity reactions including bronchospasm, hypotension, and anaphylaxis; high-titer inhibitor development requiring alternative treatments to factor IX replacement therapy
Postmarketing Anaphylaxis, angioedema, dyspnea, hypotension, thrombosis, inadequate factor IX recovery, inhibitor development, SVC syndrome in critically ill neonates (continuous infusion), peripheral thrombophlebitis, DVT
Most common (>=3%) Injection site reaction, headache, pruritus
Serious Thromboembolic events, hypersensitivity, peripheral swelling, venous thrombosis
Pharmacology
Recombinant coagulation factor IX that temporarily replaces missing factor IX needed for effective hemostasis, normalizing the activated partial thromboplastin time (aPTT) and correcting the coagulation defect in patients with hemophilia B.
Marstacimab-hncq is a human monoclonal IgG1 antibody that targets the Kunitz domain 2 (K2) of tissue factor pathway inhibitor (TFPI), neutralizing TFPI activity and enhancing thrombin generation via the extrinsic coagulation pathway.
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Most Common Insurance
Anthem BCBS
Benefix
- Covered on 5 commercial plans
- PA (9/12) · Step Therapy (0/12) · Qty limit (0/12)
Hympavzi
- Covered on 5 commercial plans
- PA (10/12) · Step Therapy (0/12) · Qty limit (0/12)
UnitedHealthcare
Benefix
- Covered on 4 commercial plans
- PA (0/8) · Step Therapy (0/8) · Qty limit (0/8)
Hympavzi
- Covered on 4 commercial plans
- PA (4/8) · Step Therapy (4/8) · Qty limit (3/8)
Humana
Benefix
- Covered on 0 commercial plans
- PA (0/3) · Step Therapy (0/3) · Qty limit (0/3)
Hympavzi
- Covered on 0 commercial plans
- PA (1/3) · Step Therapy (0/3) · Qty limit (1/3)
Coverage data sourced from MMIT. Updated monthly.
Savings
Cost estimate not availableAccessia Health: Inherited and Acquired Factor Deficiencies - Private Insurance: Waitlist
Commercial or private insurance
Medicare, Medicaid, VA, TRICARE
Cost estimate not availableAccessia Health: Inherited and Acquired Factor Deficiencies - Private Insurance: Waitlist
Commercial or private insurance
Medicare, Medicaid, VA, TRICARE
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Clinical data sourced from FDA-approved labeling. Coverage data via MMIT. Updated monthly.