SOHONOS is FDA approved to reduce the amount of new bone formation of heterotopic ossiﬁcation or HO (growth outside the skeleton) in adults and children (aged 8 years and above for females and 10 years and above for males) with ﬁbrodysplasia ossiﬁcans progressiva (FOP). SOHONOS is not recommended for females younger than 8 years of age or males younger than 10 years of age.

WHAT IS FIBRODYSPLASIA OSSIFICANS PROGRESSIVA (FOP)?

FOP is an ultra-rare genetic disorder that causes new bone to form in muscles, tendons, and ligaments, severely restricting movement.

This new bone is called heterotopic ossification, or HO.

HO can cause joints to lock up, making it hard to move. Once HO forms, it cannot be reversed, so slowing HO is important to managing the disease.

This illustration was co-created with people living with FOP.

What causes FOP?

Everyone has the ACVR1 gene.

The ACVR1 gene is responsible for making the ACVR1 protein
The ACVR1 protein interacts with other proteins (called bone morphogenetic proteins) that control some of the signals responsible for building cartilage and bone

People with FOP have a specific genetic variant of the ACVR1 gene.

In most people with FOP, the genetic variant is present for no known reason, although it can be inherited in rare cases
The variant ACVR1 gene makes an abnormal protein, which is overactive. This leads to the growth of extra bone outside the skeleton, called heterotopic ossification (HO)

FACT: Almost everyone with FOP has big toes that are shortened and bent inward.

FIBRODYSPLASIA

Abnormal tissue growth

OSSIFICANS

Bone formation

PROGRESSIVA

Progressive disease

Image from Kitoh H. Biomedicines. 2020;8(9):325.

Creative Commons license CC BY 4.0 http://creativecommons.org/licenses/by/4.0/.

FOP is so rare that only about 900 people in the world are currently diagnosed.

IMPORTANT SAFETY INFORMATION

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

SOHONOS can cause birth defects (deformed babies) if taken during pregnancy. Females who are pregnant or who plan to become pregnant must not take SOHONOS.

Your healthcare provider will ask you to take a pregnancy test 1 week before starting treatment with SOHONOS, periodically during treatment, and 1 month after you stop treatment.
You must use effective birth control (contraception) starting at least 1 month before starting treatment with SOHONOS, during treatment, and for 1 month after the last dose. Talk to your healthcare provider about birth control methods that may be right for you.
If you become pregnant or think you may be pregnant during treatment with SOHONOS, stop taking SOHONOS and call your healthcare provider right away.

Because SOHONOS can cause birth defects, SOHONOS is only for people who can understand and agree to carry out all instructions for pregnancy prevention.

SOHONOS can cause bone growth changes. Children may stop growing while taking SOHONOS. Bone growth changes such as permanent early closure of the growth plate in growing children have happened with SOHONOS. Your healthcare provider will closely monitor your child’s bone growth and height during treatment with SOHONOS.

Who should not take SOHONOS?

Do not take SOHONOS if you are pregnant, or allergic to medicines known as retinoids or any of the ingredients in SOHONOS.

What should I tell my healthcare provider before taking SOHONOS?

Before taking SOHONOS, tell your healthcare provider about all your medical conditions, including:

have bone loss (osteoporosis), weak bones or any other bone problems
have or had mental health problems
have or have had kidney problems
have or have had liver problems
are breastfeeding or plan to breastfeed. It is not known if SOHONOS passes into your breastmilk. Breastfeeding is not recommended during treatment with SOHONOS and for at least 1 month after the last dose of SOHONOS. Talk to your healthcare provider about the best way to feed your baby if you take SOHONOS.

Tell your healthcare provider about all the medicines you take, including prescription and over-the-counter medicines, vitamins, and herbal supplements. SOHONOS and certain other medicines can interact with each other, sometimes causing serious side effects. Keep a list of your medicines to show to your healthcare provider and pharmacist when you get a new medicine.

What should I avoid while taking SOHONOS?

Do not get pregnant while taking SOHONOS.
Avoid excessive exposure to sunlight and ultraviolet lights (tanning machines). SOHONOS may make your skin more sensitive to the exposure and you may burn more easily. Apply sunscreen and wear protective clothing and sunglasses when in sunlight.
Avoid driving at night until you know if SOHONOS has affected your vision. SOHONOS may decrease your ability to see in the dark.
Do not donate blood while taking SOHONOS and for 1 week after stopping SOHONOS.

What are the possible side effects of SOHONOS?

SOHONOS can cause serious side effects, including:

skin-related events such as dry skin, lip and eye, hair loss, itching, redness, rash, and skin peeling. You may be at increased risk of developing skin and soft tissue infections while taking SOHONOS. If you develop these symptoms, your healthcare provider may tell you to use moisturizer, sunscreen, or artificial tears.
bone mineral density problems (bone thinning) which can increase the risk of fractures in adults and children. Your healthcare provider should check you for this during treatment with SOHONOS.
new or worsening mental health problems that may include depression, anxiety, mood changes, and suicidal thoughts and behaviors. If you have a history of mental health problems, you may be at a higher risk of developing these side effects. Call your healthcare provider if you develop new or worsening mental health symptoms during treatment with SOHONOS. Your healthcare provider should monitor you for signs of depression and refer you for appropriate treatment, if necessary.
vision problems (night blindness) which may cause difficulty seeing at night or in low lit areas. Your healthcare provider should send you to see an eye specialist if you experience vision problems.

The most common side effects of SOHONOS include:

dry skin	rash	nausea
dry lips	skin peeling	muscle and joint pain
hair loss	drug eruption	dry eyes
itching	skin irritation	headache
redness	swelling and small cracks in corner of the mouth	fatigue

dry skin	swelling and small cracks in corner of the mouth
dry lips	nausea
hair loss	muscle and joint pain
itching	dry eyes
redness	headache
rash	fatigue
skin peeling
drug eruption
skin irritation

These are not all the possible side effects of SOHONOS. Call your doctor for medical advice about side effects. You are encouraged to report negative side effects of prescription drugs to the FDA. Visit www.fda.gov/medwatch or call 1-800-FDA-1088.

WHAT IS SOHONOS?

SOHONOS is a prescription medicine used to reduce the amount of new heterotopic ossification in adults and children 8 years of age and older for females and 10 years and older for males with fibrodysplasia ossificans progressiva (FOP). SOHONOS is not recommended for females younger than 8 years of age or males younger than 10 years of age.

Please see full Prescribing Information, including Medication Guide with IMPORTANT WARNING.