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Generic name: sirolimus protein-boundsir-OH-li-mus-PROE-teen-bownd ]
Drug class: MTOR inhibitors

Medically reviewed by on Sep 21, 2022. Written by Cerner Multum.

What is Fyarro?

Fyarro is used to treat adults with a certain type of perivascular epithelioid cell tumor (PEComa).

Fyarro may also be used for purposes not listed in this medication guide.

Fyarro side effects

Get emergency medical help if you have signs of an allergic reaction: hives; difficult breathing; swelling of your face, lips, tongue, or throat.

Fyarro may cause serious side effects. Call your doctor at once if you have:

Common side effects of Fyarro may include:

This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.


Both men and women using Fyarro should use effective birth control to prevent pregnancy. Fyarro can harm an unborn baby if the mother or father is using this medicine.

Before taking this medicine

You should not use Fyarro if you are allergic to it, other rapamycin derivatives, or albumin.

Tell your doctor if you have ever had:

Both men and women using this medicine should use effective birth control to prevent pregnancy. Fyarro can harm an unborn baby if the mother or father is using this medicine.

Keep using birth control for at least 12 weeks after your last dose. Tell your doctor right away if a pregnancy occurs.

You will need to have a negative pregnancy test before starting this treatment.

Fyarro may affect fertility in men or women. Pregnancy could be harder to achieve while either parent is using this medicine.

Do not breastfeed while using this medicine, and for at least 2 weeks after your last dose.

How is Fyarro given?

Follow all directions on your prescription label and read all medication guides or instruction sheets. Your doctor may occasionally change your dose.

Fyarro is injected into a vein by a healthcare professional over a 30-minute period on days 1 and 8 of each 21-day treatment cycle.

Your blood sugar will need to be checked on a regular basis, and you may need other medical tests.

What happens if I miss a dose?

Call your doctor for instructions if you miss a dose.

What happens if I overdose?

In a medical setting an overdose would be treated quickly.

What should I avoid while receiving Fyarro?

Avoid receiving a "live" vaccine. The vaccine may not work as well while you are using Fyarro. Live vaccines include measles, mumps, rubella (MMR), rotavirus, typhoid, yellow fever, varicella (chickenpox), and zoster (shingles).

Grapefruit may interact with Fyarro and cause side effects. Avoid consuming grapefruit products.

What other drugs will affect Fyarro?

Sometimes it is not safe to use certain medicines at the same time. Some drugs can affect your blood levels of other drugs you use, which may increase side effects or make the medicines less effective.

Other drugs may affect Fyarro, including prescription and over-the-counter medicines, vitamins, and herbal products. Tell your doctor about all other medicines you use.

Further information

Remember, keep this and all other medicines out of the reach of children, never share your medicines with others, and use this medication only for the indication prescribed.

Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.