Alprolix® [Coagulation Factor IX (Recombinant), Fc Fusion Protein] logo
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For patients with hemophilia B

Trusted bleed protection* every step of the way

Sign up today for helpful information about ALPROLIX® and to connect with a Sanofi Hemophilia CoRe Manager.

10 years trusted
10 years trusted

ALPROLIX® is the first extended half-life (EHL) factor IX therapy for hemophilia B. Since 2014, ALPROLIX has had over 10 years of experience across ages and settings.

*ALPROLIX has been proven to help prevent bleeding episodes in people using prophylaxis.
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Looking to stay ahead of bleeds?
ALPROLIX prophy can give you the confidence to help you achieve bleed protection.*
Learn about prophylaxis
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Treating bleeds as they occur?
Just 1 infusion of ALPROLIX stopped most bleeds for adults, adolescents, and kids treating on demand.
Learn about on demand
Factor IX Helps stop bleeds + Fc Molecule Helps factor IX recirculate in your blood = ALPROLIX Extended Factor IX activity

ALPROLIX keeps factor IX in the body for longer

ALPROLIX uses Fc Fusion to keep factor IX in the body for longer—more than twice as long as standard half-life (SHL) therapies. This unique design helps ALPROLIX mimic the movement of natural factor IX.

Factor IX Helps stop bleeds + Fc Molecule Helps factor IX recirculate in your blood = ALPROLIX Extended Factor IX activity
Find your CoRe Manager and connect today
Sanofi Hemophilia Community Relations and Education (CoRe) Managers are here to help people with hemophilia and their families. They share easy-to-understand info about living with hemophilia, including lifestyle tips and treatment choices. Use our CoRe Locator to find someone near you.
Find my CoRe
Illustrated map of the US: Chosen by 1500+ patients since US launch in 2014
Illustrated map of the US: Chosen by 1500+ patients since US launch in 2014

ALPROLIX may help make treatment less burdensome

  • Since ALPROLIX is an EHL, it lasts longer in the body, so you may need fewer infusions
  • Convenient dosing schedules offer flexibility and freedom to help fit the lifestyles of adults, adolescents, and kids
  • ALPROLIX is available in a range of vial sizes that may help make single-vial infusions possible
†Based on records from US specialty pharmacies, third-parties, and internal estimates from May 2014 through July 2024.
“Since starting ALPROLIX...I am grateful I have the protection from bleeds I need.”
—CJ, treating with ALPROLIX since 2014
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Patient CJ

Important Safety Information and Indication
INDICATION
IMPORTANT SAFETY INFORMATION
INDICATION
ALPROLIX® [Coagulation Factor IX (Recombinant), Fc Fusion Protein] is an injectable medicine that is used to help control and prevent bleeding in people with hemophilia B. Hemophilia B is also called congenital Factor IX deficiency. Your healthcare provider may give you ALPROLIX when you have surgery.
IMPORTANT SAFETY INFORMATION
Do not use ALPROLIX if you are allergic to ALPROLIX or any of the other ingredients in ALPROLIX.

Tell your healthcare provider if you have or have had any medical problems, take any medicines, including prescription and non-prescription medicines, supplements, or herbal medicines, have any allergies and all your medical conditions, including if you are pregnant or planning to become pregnant, are breastfeeding, or have been told you have inhibitors (antibodies) to Factor IX.

Common side effects of ALPROLIX include headache, abnormal sensation in the mouth, and pain in your side with blood in your urine, which may be a sign of clot formation in the urinary collecting system.

Allergic reactions may occur with ALPROLIX. Call your healthcare provider or get emergency treatment right away if you have any of the following symptoms: hives, chest tightness, wheezing, difficulty breathing, or swelling of the face.

Redness to the skin at the injection site may also occur.

ALPROLIX may increase the risk of formation of abnormal blood clots in your body, especially if you have risk factors for developing blood clots. Call your healthcare provider or seek emergency care if you have symptoms of a possible abnormal blood clot, which may include: chest pain, difficulty breathing, unexpected swelling of an arm or leg with or without pain or tenderness.

Your body can also make antibodies called "inhibitors" against ALPROLIX, which may stop ALPROLIX from working properly.

These are not all of the possible side effects of ALPROLIX. Talk to your healthcare provider right away about any side effect that bothers you or does not go away, or if bleeding is not controlled using ALPROLIX.
© 2025 Sanofi. All rights reserved. ALPROLIX, Sanofi, and HemAssist are trademarks or registered trademarks of Sanofi or an affiliate. All the other trademarks above are the property of their respective owners, who have no affiliation or relationship with Sanofi. MAT-US-2021803-v8.0-10/2025 Last updated: October 2025