Protection in patients using BeneFIX once weekly (median study results)†
36% of patients in the study did not have any bleeds while on BeneFIX once-weekly prophylaxis.
The interquartile range (IQR) for the total ABR with once-weekly prophylaxis was 0.0 to 5.8. The IQR for the annualized spontaneous bleeding rate and ABR in joints with once-weekly prophylaxis was 0.0 to 2.9. The IQR represents the middle 50% of ABRs when ordered from lowest to highest.
In a multicenter, open-label clinical trial, 25 previously treated patients (PTPs) were treated with BeneFIX administered at 100 IU/kg once weekly and evaluated for approximately 52 weeks. Common (≥5%) adverse reactions were headache (36%), fever (20%), and cough (8%).
In the study, no patients were withdrawn from the study due to an adverse reaction, no inhibitors were detected, and no thrombotic (blood clotting) events or anaphylactic events were reported.
Low levels of inhibitors in BeneFIX clinical trials
The body can make antibodies called "inhibitors.” These may stop BeneFIX from working properly. The higher the level of inhibitors, the more they may block effective treatment with BeneFIX.
The strength of an inhibitor in a person's blood is measured in Bethesda units (BU).
High titer (more than 5 BU)
Low titer (less than 5 BU)
In PTPs in a clinical trial:
developed an inhibitor with BeneFIX once weekly.
Patients included in the study had ≥100 exposure days to factor IX products and no current or past history of factor IX inhibitors prior to enrollment (N=25).
“I HAD QUESTIONS.
THEY HAD ANSWERS AND SUPPORT.”
BeneFix, Coagulation Factor IX (Recombinant), is an injectable medicine that is used to help control and prevent bleeding in people with hemophilia B. Your doctor might also give you BeneFix before surgical procedures.
BeneFix is NOT used to treat hemophilia A.
Please see fullPrescribing Informationfor BeneFix.
Please see full Prescribing Information for BeneFIX.
Patients should always ask their doctors for medical advice about adverse events.
You are encouraged to report adverse events related to Pfizer products by calling
Persons depicted throughout this website are not actual BeneFIX patients unless stated otherwise.
© 2024 Pfizer Inc. All rights reserved.
February 2024
PP-BEN-USA-0905
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Pfizer accepts no responsibility for the content of linked sites.
This site is owned by Pfizer and contains information about financial support offerings.
The information provided in BeneFIXHCP.com is intended only for healthcare professionals in the United States.
ContinueImportant Safety Information and Indication
See MoreBeneFix, Coagulation Factor IX (Recombinant), is an injectable medicine that is used to help control and prevent bleeding in people with hemophilia B. Your doctor might also give you BeneFix before surgical procedures.
BeneFix is NOT used to treat hemophilia A.
Please see full Prescribing Information for BeneFix.
Patients should always ask their doctors for medical advice about adverse events.
You are encouraged to report adverse events related to Pfizer products by calling
Persons depicted throughout this website are not actual BeneFix patients.
Copyright © 2023 Pfizer Inc. All rights reserved.
July 2023
PP-BENPP-BEN-USA-0829