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Charles’ patient story


Charles was diagnosed with hemophilia B during infancy. Growing up, Charles was an active child who liked sports and outdoor activities. As a result, he often experienced bleeds.

Charles was introduced to BeneFIX when he participated in an FDA clinical trial. He found that he was able to manage his bleeds on BeneFIX. Charles stayed on BeneFIX for many years until one day he decided to try other treatments. It was during this time that Charles grew frustrated at the number of bleeds he was experiencing.

After 6 months of trying other treatments, Charles went back to BeneFIX. He felt that BeneFIX was the right choice for him. Now that Charles is back on BeneFIX, he's looking forward to living life on his terms.


Individual results may vary. The words and opinions of Charles are his own. Charles was compensated by Pfizer for his participation.

Important Safety Information
  • BeneFix is contraindicated in patients who have manifested life-threatening, immediate hypersensitivity reactions, including anaphylaxis, to the product or its components, including hamster protein.
  • Call your health care provider right away if your bleeding is not controlled after using BeneFix.
  • Allergic reactions may occur with BeneFix. Call your health care provider or get emergency treatment right away if you have any of the following symptoms: wheezing, difficulty breathing, chest tightness, your lips and gums turning blue, fast heartbeat, facial swelling, faintness, rash, or hives.
  • Your body can make antibodies, called “inhibitors,” which may stop BeneFix from working properly.
  • If you have risk factors for developing blood clots, such as a venous catheter through which BeneFix is given by continuous infusion, BeneFix may increase the risk of abnormal blood clots. The safety and efficacy of BeneFix administration by continuous infusion have not been established.
  • Some common side effects of BeneFix are fever, cough, nausea, injection site reaction, injection site pain, headache, dizziness, and rash.
What Is BeneFix?

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 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 1-800-438-1985 (U.S. only). If you prefer, you may contact the U.S. Food and Drug Administration (FDA) directly. Visit www.fda.gov/MedWatch or call 1-800-FDA-1088 .

You are encouraged to report adverse events related to Pfizer products by calling 1-800-438-1985 (U.S. only). If you prefer, you may contact the U.S. Food and Drug Administration (FDA) directly. Visit www.fda.gov/MedWatch or call 1-800-FDA-1088.

Persons depicted throughout this website are not actual BeneFIX patients unless stated otherwise.

© 2026 Pfizer Inc. All rights reserved.
January 2026
PP-BEN-USA-1065
Pfizer logo

Important Safety Information and Indication

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Important Safety Information
  • BeneFix is contraindicated in patients who have manifested life-threatening, immediate hypersensitivity reactions, including anaphylaxis, to the product or its components, including hamster protein.
  • Call your health care provider right away if your bleeding is not controlled after using BeneFix.
  • Allergic reactions may occur with BeneFix. Call your health care provider or get emergency treatment right away if you have any of the following symptoms: wheezing, difficulty breathing, chest tightness, your lips and gums turning blue, fast heartbeat, facial swelling, faintness, rash, or hives.
  • Your body can make antibodies, called “inhibitors,” which may stop BeneFix from working properly.
  • If you have risk factors for developing blood clots, such as a venous catheter through which BeneFix is given by continuous infusion, BeneFix may increase the risk of abnormal blood clots. The safety and efficacy of BeneFix administration by continuous infusion have not been established.
  • Some common side effects of BeneFix are fever, cough, nausea, injection site reaction, injection site pain, headache, dizziness, and rash.
What Is BeneFix?

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 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 1-800-438-1985 (U.S. only). If you prefer, you may contact the U.S. Food and Drug Administration (FDA) directly. Visit https://www.fda.gov/MedWatch or call 1-800-FDA-1088 .

You are encouraged to report adverse events related to Pfizer products by calling 1-800-438-1985 (U.S. only). If you prefer, you may contact the U.S. Food and Drug Administration (FDA) directly. Visit https://www.fda.gov/MedWatch or call 1-800-FDA-1088.

Persons depicted throughout this website are not actual BeneFix patients.

Copyright © 2026 Pfizer Inc. All rights reserved.
January 2026
PP-BEN-USA-1065
Pfizer Logo