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Peer Chayse with quote “Using ALTUVIIIO has simplified my routine, and the peace of mind knowing that I’m covered for longer has made me so happy.”

Meet Chayse

“My mom is a spontaneous carrier, so I’m the only one in my family with hemophilia. Growing up, it was easy to get frustrated when something makes you different. But I feel lucky because my family has never made me feel different—this is our normal.

When I was 7, I learned how to self-infuse at a 5-day hemophilia camp, which gave me the confidence to try other new things, like playing music. Now, I’m a professional musician. I compose, record, and perform my own music while teaching others how to use their voices and play guitar, drums, and piano. Expressing myself creatively has been life-changing, even leading me to meet my future wife, Katie.

I heard about ALTUVIIIO from my CoRe, and asked my doctor if it would be right for me. I did some math, and over the last 28 years of using my factor every other day, I’ve stuck myself over 5000 times. That’s 180 times a year, on average. If I have a bleed, then it’s more. If ALTUVIIIO was right for me, that would mean sticking myself as few as 52 times a year. When I realized what that infusion schedule could mean for my daily life, and my veins, I knew I wanted to try ALTUVIIIO. We determined that it was a good fit for me, and I started ALTUVIIIO in January 2024.

I’m still getting used to realizing that I’m getting a full week between infusions. ALTUVIIIO keeping my factor levels higher for longer has changed not only my routine, but my wife’s as well. Not only am I sticking myself fewer times, it’s less worrying about transporting and packing doses of factor while we travel, and less math trying to figure out which days to infuse. Using ALTUVIIIO has simplified my routine, and the peace of mind knowing that I’m covered for longer has made me so happy. I try to enjoy every moment of every day, whether it’s teaching music, performing, playing golf, or watching a movie with my wife for the 18th time.

My hope is that I can encourage other people with hemophilia to feel confident in taking some control over their own healthcare. Finding a treatment plan that is the right fit for you is worth pursuing with your doctor.”

Chayse is a promotional speaker compensated by Sanofi. Peer stories based on data collected March 2026.

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INDICATION
INDICATION
IMPORTANT SAFETY INFORMATION
INDICATION

ALTUVIIIO® [antihemophilic factor (recombinant), Fc-VWF-XTEN fusion protein-ehtl] is an injectable medicine that is used to control and reduce the number of bleeding episodes in people with hemophilia A (congenital Factor VIII deficiency).

Your healthcare provider may give you ALTUVIIIO when you have surgery.

IMPORTANT SAFETY INFORMATION

What is the most important information I need to know about ALTUVIIIO?

Do not attempt to give yourself an injection unless you have been taught how by your healthcare provider or hemophilia center. You must carefully follow your healthcare provider’s instructions regarding the dose and schedule for injecting ALTUVIIIO so that your treatment will work best for you.

Who should not use ALTUVIIIO?

You should not use ALTUVIIIO if you have had an allergic reaction to it in the past.

What should I tell my healthcare provider before using ALTUVIIIO?

Tell your healthcare provider if you have had any medical problems, take any medications, including prescription and non-prescription medicines, supplements, or herbal medicines, are breastfeeding, or are pregnant or planning to become pregnant.

What are the possible side effects of ALTUVIIIO?

You can have an allergic reaction to ALTUVIIIO. Call your healthcare provider or emergency department right away if you have any of the following symptoms: difficulty breathing, chest tightness, swelling of the face, rash, or hives.

Your body can also make antibodies called “inhibitors” against ALTUVIIIO. This can stop ALTUVIIIO from working properly. Your healthcare provider may give you blood tests to check for inhibitors.

The common side effects of ALTUVIIIO are headache and joint pain.

These are not the only possible side effects of ALTUVIIIO. Tell your healthcare provider about any side effect that bothers you or does not go away.

MAT-US-2307222-v7.0-03/2026 Last Updated: March 2026