CRYSVITA is for XLH adult and pediatric patients 1 year and older.
CRYSVITA is for XLH adult and pediatric patients 1 year and older.

Now Approved CRYSVITA (burosumab-twza) for X-linked Hypophosphatemia (XLH)

Now approved

CRYSVITA® (burosumab-twza)

injection for subcutaneous use

The first and only FDA-approved therapy for X-linked hypophosphatemia (XLH)

  • CRYSVITA is a fibroblast growth factor 23 (FGF23) blocking antibody indicated for the treatment of XLH in adult and pediatric patients 1 year of age and older.
  • CRYSVITA is the only therapy that addresses the underlying cause of XLH.

Assistance for Crysvita treatment access

Visit UltraCare™ Patient Support to connect with our UltraCare Guides. We provide patient assistance services to help gain access to CRYSVITA. UltraCare offers a suite of services designed to help patients understand insurance coverage, determine eligibility for Financial Assistance programs and Patient Assistance programs, and access to resources in the Patient Support programs.

Visit UltraCare

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Important Safety Information
LESS

What is CRYSVITA?

CRYSVITA is a prescription medicine used to treat adults and children 1 year of age and older with X-linked hypophosphatemia (XLH).

Important Safety Information

    You should not take CRYSVITA if:
  • You take an oral phosphate supplement and a specific form of vitamin D supplement
  • Your phosphorus levels from a blood sample are within or above the normal range for age
  • You have kidney problems
    What is the most important information you should know about CRYSVITA?
  • Some patients developed allergic reactions (rash and hives) while taking CRYSVITA. Your doctor will monitor you for symptoms of an allergic reaction while you are taking CRYSVITA.
  • High levels of phosphorus in the blood have been reported in some patients taking CRYSVITA. This may be related to a risk of high calcium levels in the kidneys. Your doctor will collect samples to monitor your levels.
  • Administration of CRYSVITA may result in reactions at the injection site, such as hives, reddening of the skin, rash, swelling, bruising, pain, severe itching of the skin, and collection of blood outside of a blood vessel (hematoma).
    What are the possible side effects of CRYSVITA?
  • The most common adverse reactions that were seen in children with XLH are:
    • Headache
    • Injection site reaction
    • Vomiting
    • Fever
    • Pain in arms and legs
    • Decreased vitamin D levels
    • Rash
    • Toothache
    • Muscle pain
    • Tooth infection
    • Dizziness
  • The most common adverse reactions that were seen in adults with XLH are:
    • Back pain
    • Headache
    • Tooth infection
    • Restless leg syndrome
    • Decreased vitamin D levels
    • Dizziness
    • Constipation
    • Phosphorus levels increased in the blood
  • Narrowing of the spaces within the spine is common in adults with XLH and pressure on the spinal cord has been reported in adults taking CRYSVITA. It is not known if taking CRYSVITA worsens the narrowing of the spaces within the spine or the pressure on the spinal cord.
    Before taking CRYSVITA, tell your doctor about all of your medical conditions, including if you:
  • are pregnant, think you may be pregnant, or plan to become pregnant. There is not enough experience to know if CRYSVITA may harm your unborn baby. Report pregnancies to the Ultragenyx Adverse Event reporting line at 1-888-756-8657.
  • are breastfeeding or plan to breastfeed. There is not enough experience to know if CRYSVITA passes into your breast milk. Talk with your doctor about the best way to feed your baby while you receive CRYSVITA.
    While taking CRYSVITA, tell your doctor if you experience:
  • An allergic reaction such as rash or hives
  • A rash, swelling, bruising or other reaction at the injection site
  • New or worsening restless leg syndrome

These are not all the possible side effects of CRYSVITA. Call your doctor for medical advice about side effects.

You may report side effects to the FDA at (800) FDA-1088 or www.fda.gov/medwatch. You may also report side effects to Ultragenyx at 1-888-756-8657.

Please see full Prescribing Information for additional Important Safety Information.

What is CRYSVITA?

CRYSVITA is a prescription medicine used to treat adults and children 1 year of age and older with X-linked hypophosphatemia (XLH).

Important Safety Information

    You should not take CRYSVITA if:
  • You take an oral phosphate supplement and a specific form of vitamin D supplement
  • Your phosphorus levels from a blood sample are within or above the normal range for age
  • You have kidney problems
    What is the most important information you should know about CRYSVITA?
  • Some patients developed allergic reactions (rash and hives) while taking CRYSVITA. Your doctor will monitor you for symptoms of an allergic reaction while you are taking CRYSVITA.
  • High levels of phosphorus in the blood have been reported in some patients taking CRYSVITA. This may be related to a risk of high calcium levels in the kidneys. Your doctor will collect samples to monitor your levels.
  • Administration of CRYSVITA may result in reactions at the injection site, such as hives, reddening of the skin, rash, swelling, bruising, pain, severe itching of the skin, and collection of blood outside of a blood vessel (hematoma).
    What are the possible side effects of CRYSVITA?
  • The most common adverse reactions that were seen in children with XLH are:
    • Headache
    • Injection site reaction
    • Vomiting
    • Fever
    • Pain in arms and legs
    • Decreased vitamin D levels
    • Rash
    • Toothache
    • Muscle pain
    • Tooth infection
    • Dizziness
  • The most common adverse reactions that were seen in adults with XLH are:
    • Back pain
    • Headache
    • Tooth infection
    • Restless leg syndrome
    • Decreased vitamin D levels
    • Dizziness
    • Constipation
    • Phosphorus levels increased in the blood
  • Narrowing of the spaces within the spine is common in adults with XLH and pressure on the spinal cord has been reported in adults taking CRYSVITA. It is not known if taking CRYSVITA worsens the narrowing of the spaces within the spine or the pressure on the spinal cord.
    Before taking CRYSVITA, tell your doctor about all of your medical conditions, including if you:
  • are pregnant, think you may be pregnant, or plan to become pregnant. There is not enough experience to know if CRYSVITA may harm your unborn baby. Report pregnancies to the Ultragenyx Adverse Event reporting line at 1-888-756-8657.
  • are breastfeeding or plan to breastfeed. There is not enough experience to know if CRYSVITA passes into your breast milk. Talk with your doctor about the best way to feed your baby while you receive CRYSVITA.
    While taking CRYSVITA, tell your doctor if you experience:
  • An allergic reaction such as rash or hives
  • A rash, swelling, bruising or other reaction at the injection site
  • New or worsening restless leg syndrome

These are not all the possible side effects of CRYSVITA. Call your doctor for medical advice about side effects.

You may report side effects to the FDA at (800) FDA-1088 or www.fda.gov/medwatch. You may also report side effects to Ultragenyx at 1-888-756-8657.

Please see full Prescribing Information for additional Important Safety Information.

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