What is Krystexxa: Uses, Warnings & Interactions

Updated May 14, 2025  •  Published May 30, 2021

Krystexxa overview

BRAND NAMES:

  • Krystexxa

Generic Names:

  • Krystexxa

Uses:

  • Treats chronic gout.

Therapeutic Classes:

  • Antigout

Forms:

  • Injectable

How it’s taken:

  • By injection

What is Krystexxa used for?

Krystexxa is an enzyme used to treat patients diagnosed with gout. This medication works to remove excess build-up of uric acid in the body. It turns the uric acid into a harmless chemical and is passed out the body through urine.

What form(s) does Krystexxa come in

  • Injectable

What are common Krystexxa doses?

  • Vial 1ML of 8MG/ML

Common Krystexxa prescriptions

  • Krystexxa
    1ml of 8mg/ml vial

How to take Krystexxa

  • Injection route: Your doctor will prescribe your dose and schedule. This medicine is given through a needle placed in a vein. This medicine is usually given every 2 weeks.

  • Injection route: A nurse or other health provider will give you this medicine.

  • This medicine must be given slowly, so the needle will stay in place for 2 hours or longer.

  • This medicine should come with a Medication Guide. Ask your pharmacist for a copy if you do not have one.

  • Missed dose: You must use this medicine on a fixed schedule. Call your doctor or pharmacist if you miss a dose.

What to do if you miss a dose of Krystexxa

Krystexxa contraindications

  • This medicine is not right for everyone. You should not receive it if you had an allergic reaction to pegloticase.

Krystexxa warnings

  • Tell your doctor if you are pregnant or breastfeeding or if you have congestive heart failure, or glucose-6-phosphate dehydrogenase (G6PD) deficiency or favism.

  • Tell your doctor if you have relatives from Africa, Southern Asia, or a Mediterranean country. People with relatives from these areas are more likely to have a genetic G6PD deficiency.

  • Gout flares may occur in the first 3 months after you start receiving this medicine. Do not stop receiving this medicine even if you have a gout flare. Your doctor may give you medicines to reduce and prevent worsening of gout.

  • Your doctor will do lab tests at regular visits to check on the effects of this medicine. Keep all appointments.

  • Worsening symptoms of gout

Krystexxa interactions

  • Tell your doctor if you use other medicines to lower uric acid levels, including allopurinol or febuxostat.

  • Tell your doctor if you have relatives from Africa or a Mediterranean country. People with relatives from these areas are more likely to have a genetic G6PD deficiency.

  • Gout flares may occur in the first 3 months after you start receiving this medicine. Do not stop receiving this medicine even if you have a gout flare. Your doctor may give you medicines to reduce and prevent worsening of gout.

  • Your doctor will do lab tests at regular visits to check on the effects of this medicine. Keep all appointments.

Krystexxa side effects

Serious Side Effects

  • Allergic reaction: Itching or hives, swelling in your face or hands, swelling or tingling in your mouth or throat, chest tightness, trouble breathing

  • Swelling in your hands, ankles, or feet

  • Chest pain or uneven heartbeat, trouble breathing

  • Worsening symptoms of gout

  • Warmth or redness in your face, neck, arms, or upper chest

Less Serious Side Effects

  • Pain, itching, burning, swelling, or a lump under your skin where the needle is placed

  • Bruises or purplish patches on the skin

  • Nausea

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