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Consistent protection with as few as 6 injections a year*

Qfitlia™ (fitusiran) prophylaxis helps your blood's ability to clot by lowering a protein called antithrombin

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* In the clinical study, ~67% of people with hemophilia took Qfitlia every other month, and ~19% took it monthly.

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As few as 6 injections a year

  • The starting dose of Qfitlia is 50 mg, administered once every two months
  • Your doctor will measure your antithrombin levels via a blood test before starting treatment and again during Months 1, 3, 5, and 6, adjusting the dose as needed. This testing cycle will restart if a dose adjustment is made. Once your maintenance dose is determined, your doctor will measure antithrombin via a blood test on a yearly basis
  • Your doctor will monitor your liver enzymes via a blood test before starting treatment, monthly for at least 6 months after starting treatment, and monthly for at least 6 months after a dose increase and periodically thereafter

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Easy-to-use prefilled pen

  • Injected just below the skin (subcutaneously)
  • No mixing needed
  • No weight-based dosing

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No refrigeration for up to 3 months

  • Qfitlia prefilled pen may be stored at room temperature between 59 °F to 86 °F (15 °C to 30 °C) for a single period of up to 3 months within the expiration date printed on the label
  • Allows for ease of travel

† Prefilled pen administration for the 50 mg dose. Vial and syringe administration for the 10 mg and 20 mg dose.

The Qfitlia prefilled pen is easy to use

Introducing the Qfitlia Prefilled Pen. Qfitlia can offer consistent protection for people with hemophilia A or B, with or without inhibitors, with as few as 6 injections per year.

Please read the following important information.

Designed with users in mind, Qfitlia can be injected with the prefilled pen just below the skin, with no mixing or weight-based dosing required. The prefilled pen has an ergonomic design to provide control and comfort. It also includes a Window as a helpful way to track injection progress.

The prefilled pen can be used to inject Qfitlia in only 4 steps. After removing the cap, the needle is hidden for a user-friendly experience. The injection starts automatically when the prefilled pen is pressed against the skin. The Window turning yellow shows the injection’s progress from start to finish. That’s it! The injection with the Qfitlia Prefilled Pen is complete.

With Qfitlia, spend less time treating prophylactically and more time your way. Speak with your doctor to learn more about the Qfitlia Prefilled Pen.

INDICATION

Qfitlia ™ (fitusiran) is a prescription medicine used for routine prophylaxis to prevent or reduce the frequency of bleeding episodes in adults and children 12 years and older with hemophilia A or B, with or without Factor VIII or IX inhibitors.

It is not known if Qfitlia is safe and effective in children younger than 12 years of age.

IMPORTANT SAFETY INFORMATION

Qfitlia can cause SERIOUS SIDE EFFECTS, including:

  • Abnormal blood clotting (thrombotic events): Serious blood clots have occurred in people treated with Qfitlia. Qfitlia can cause blood clots to form in the blood vessels in your arms, legs, lungs, heart, brain, eyes, or head. Your risk of blood clots is greater if your antithrombin blood level is persistently less than 15% or if you have certain other conditions. Your HCP will check your AT blood levels before and during treatment with Qfitlia.

  • Gallbladder disease: Qfitlia can cause gallstones and inflammation of your gallbladder, which might require surgery to remove your gallbladder. Tell your (HCP) right away if you develop stomach pain, indigestion, nausea, or vomiting. Your HCP may temporarily or permanently stop Qfitlia if you develop any of these symptoms.

What is the most important information I should know about Qfitlia?

Qfitlia helps your blood form clots. Do not stop using Qfitlia without talking to your HCP. If you miss doses or stop using Qfitlia, you may no longer be protected against bleeding.

Use of a clotting factor concentrate (CFC) or bypassing agent (BPA) help protect against bleeding must be stopped within 7 days after your first dose of Qfitlia.

Your HCP may prescribe on-demand CFC or BPA if you bleed during treatment with Qfitlia. Carefully follow your HCP’s instructions regarding when to use on-demand treatment with CFC or BPA, including the prescribed dose and timing of the CFC or BPA.

Get medical help right away if you get any of these signs or symptoms of blood clots during or after treatment with Qfitlia:

  • Swelling, pain or redness in arms or legs
  • Coughing up blood
  • Shortness of breath
  • Severe chest pain or tightness of the chest
  • Fast heart rate
  • Feeling faint or passing out
  • Severe or persistent headache
  • Difficulty speaking or understanding language
  • Feeling confused
  • Numbness or weakness in your face, arms, or legs
  • Sudden loss or changes in your vision, eye pain, or swelling

What are the possible side effects of Qfitlia?

  • Qfitlia can cause other serious side effects, including an increase in your blood liver enzymes. Your HCP will do blood tests to check your liver function before and during treatment with Qfitlia.
  • The most common side effects of Qfitlia include viral infection, common cold symptoms, and bacterial infection.

These are not all the possible side effects of Qfitlia.

What should I tell my healthcare provider before using Qfitlia?

  • Tell your HCP about all of your medical conditions, including if you have liver problems, a history of gallbladder disease, are pregnant or plan to become pregnant, or are breastfeeding or plan to breastfeed.
  • Females who are able to become pregnant: Hormonal birth control may increase your risk of blood clots if used during treatment with Qfitlia. Talk to your HCP about effective forms of non-hormonal birth control you can use before starting and during treatment with Qfitlia.
  • Tell your HCP about all of the medicines you take, including prescription and over-the-counter medicines, vitamins, and herbal supplements.

Please see accompanying full Prescribing Information, including SERIOUS SIDE EFFECTS, and Medication Guide.

Where are you in your hemophilia journey?

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Learn about bleed protection, safety, and how Qfitlia works.

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Whether you’re preparing to switch, just getting started, or are already taking Qfitlia, find helpful guidance for every part of your treatment journey.

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Find a Sanofi Educator and connect today

Sanofi Hemophilia Community Relations and Education (CoRe) Managers offer education to people living with hemophilia and their families. CoRe Managers provide information about living with hemophilia and treatment options.

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Important Safety Information and Indication
INDICATION
IMPORTANT SAFETY INFORMATION
INDICATION
Qfitlia™ (fitusiran) is a prescription medicine used for routine prophylaxis to prevent or reduce the frequency of bleeding episodes in adults and children 12 years and older with hemophilia A or B with or without Factor VIII or IX inhibitors.

It is not known if Qfitlia is safe and effective in children younger than 12 years of age.
IMPORTANT SAFETY INFORMATION

Qfitlia can cause SERIOUS SIDE EFFECTS, including:

  • Abnormal blood clotting (thrombotic events): Serious blood clots have occurred in people treated with Qfitlia. Qfitlia can cause blood clots to form in the blood vessels in your arms, legs, lungs, heart, brain, eyes, or head. Your risk of blood clots is greater if your antithrombin (AT) blood level is persistently less than 15% or if you have certain other conditions. Your healthcare provider (HCP) will check your AT blood levels before and during treatment with Qfitlia

  • Gallbladder disease: Qfitlia can cause gallstones and inflammation of your gallbladder, which might require surgery to remove your gallbladder. Tell your HCP right away if you develop stomach pain, indigestion, nausea, or vomiting. Your HCP may temporarily or permanently stop Qfitlia if you develop any of these symptoms


What is the most important information I should know about Qfitlia?

Qfitlia helps your blood form clots. Do not stop using Qfitlia without talking to your HCP. If you miss doses or stop using Qfitlia, you may no longer be protected against bleeding.


Use of a clotting factor concentrate (CFC) or bypassing agent (BPA) to help protect against bleeding must be stopped within 7 days after your first dose of Qfitlia.


Your HCP may prescribe on-demand CFC or BPA if you bleed during treatment with Qfitlia. Carefully follow your HCP’s instructions regarding when to use on-demand treatment with CFC or BPA, including the prescribed dose and timing of the CFC or BPA.


Get medical help right away if you get any of these signs or symptoms of blood clots during or after treatment with Qfitlia:

  • Swelling, pain, or redness in arms or legs
  • Coughing up blood
  • Shortness of breath
  • Severe chest pain or tightness of the chest
  • Fast heart rate
  • Feeling faint or passing out
  • Severe or persistent headache
  • Difficulty speaking or understanding language
  • Feeling confused
  • Numbness or weakness in your face, arms, or legs
  • Sudden loss or changes in your vision, eye pain, or swelling

What are the possible side effects of Qfitlia?

  • Qfitlia can cause other serious side effects, including an increase in your blood liver enzymes. Your HCP will do blood tests to check your liver function before and during treatment with Qfitlia

  • The most common side effects of Qfitlia include viral infection, common cold symptoms, and bacterial infection

These are not all the possible side effects of Qfitlia.


What should I tell my HCP before using Qfitlia?

  • Tell your HCP about all of your medical conditions, including if you have liver problems, a history of gallbladder disease, are pregnant or plan to become pregnant, or are breastfeeding or plan to breastfeed

  • Females who are able to become pregnant: Hormonal birth control may increase your risk of blood clots if used during treatment with Qfitlia. Talk to your HCP about effective forms of non-hormonal birth control you can use before starting and during treatment with Qfitlia

  • Tell your HCP about all of the medicines you take, including prescription and over-the-counter medicines, vitamins, and herbal supplements

© 2025 Sanofi. All rights reserved. Qfitlia and Sanofi are trademarks of Sanofi or an affiliate. All other trademarks are the property of their respective owners. Qfitlia is sold under license from Alnylam Pharmaceuticals, Inc. MAT-US-2413048-v1.0-03/2025 Last Updated: March 2025