pegvaliase (Palynziq)

Brand Names: Palynziq

Generic Name: pegvaliase

What is pegvaliase (Palynziq)?

Pegvaliase is a man-made form of an enzyme that metabolizes phenylalanine.

Pegvaliase is used in adults with phenylketonuria (PKU) to lower phenylalanine blood levels when they are not controlled with other treatment

Pegvaliase is available only from a certified pharmacy under a special program.

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

What are the possible side effects of pegvaliase (Palynziq)?

Stop the pegvaliase injection and get emergency medical help if you have signs of an allergic reaction:

  • hives, rash, itching;
  • confusion, dizziness, feeling like you might pass out;
  • nausea, vomiting, diarrhea;
  • loss of bladder or bowel control;
  • fast heartbeats;
  • wheezing, chest tightness, difficult breathing;
  • flushing (warmth, redness, or tingly feeling); or
  • swelling of your face, lips, tongue, or throat.

Common side effects may include:

  • a spreading skin reaction (itching, redness, rash) that could last at least 14 days;
  • headache, joint pain;
  • nausea, vomiting, stomach pain, diarrhea;
  • tiredness; or
  • pain, tenderness, bruising, redness, itching, or swelling where the injection was given.

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.

What is the most important information I should know about pegvaliase (Palynziq)?

Pegvaliase can cause a serious allergic reaction. You will receive your first dose in a hospital or clinic setting to make sure you do not have an allergic reaction.

What should I discuss with my healthcare provider before using pegvaliase (Palynziq)?

Pegvaliase can cause a serious allergic reaction. Your doctor may prescribe an epinephrine injection kit to use in case you have a severe allergic reaction. Keep this injection kit with you at all times.

Tell your doctor if you think you might be unable to give yourself an emergency epinephrine injection.

Follow your doctor's instructions about using this medicine if you are pregnant. Control of your phenylalanine levels is very important during pregnancy, and your dose needs may change if your levels get too high or too low.

If you are pregnant, your name may be listed on a pregnancy registry to track the effects of pegvaliase on the baby.

It may not be safe to breast-feed while using this medicine. Ask your doctor about any risk.

Pegvaliase is not approved for use by anyone younger than 18 years old.

How should I use pegvaliase (Palynziq)?

Follow all directions on your prescription label and read all medication guides or instruction sheets. Your doctor may occasionally change your dose. Use the medicine exactly as directed.

You will receive your first dose in a hospital or clinic setting. You will be watched closely for at least 1 hour to make sure you do not have an allergic reaction.

Pegvaliase is injected under the skin. A healthcare provider may teach you how to properly use the medication by yourself.

You may be given other medications to help prevent allergic reaction. Keep using these medicines for as long as your doctor has prescribed.

You may need to have someone with you when you use this medicine at home, to watch you for signs of an allergic reaction and give the epinephrine injection if needed.

Read and carefully follow any Instructions for Use provided with your medicine. Do not use pegvaliase if you don't understand all instructions for proper use. Ask your doctor or pharmacist if you have questions.

Prepare your injection only when you are ready to give it. Do not use if the medicine has changed colors or has particles in it. Call your pharmacist for new medicine.

Do not shake the prefilled syringe or you may ruin the medicine.

Your care provider will show you where on your body to inject pegvaliase. Use a different place each time you give an injection. Do not inject into the same place two times in a row.

Pegvaliase comes with a Medication Guide and a Warning Card listing symptoms of an allergic reaction. Read this information and learn what symptoms to watch for. Keep the Wallet Card with you at all times.

You will need frequent medical tests.

You will need to follow a special diet while using pegvaliase. Follow all instructions of your doctor or dietitian. Learn about the foods to eat or avoid to help control your condition.

Store this medicine in the refrigerator, do not freeze.

You may store the medicine for up to 30 days at room temperature in its original container, protected from light. Do not put the medicine back into the refrigerator. Throw away any unused medicine after 30 days or after the expiration date on the label has passed.

Each single-use prefilled syringe is for one use only. Throw it away after one use, even if there is still medicine left inside.

Use a needle and syringe only once and then place them in a puncture-proof "sharps" container. Follow state or local laws about how to dispose of this container. Keep it out of the reach of children and pets.

What happens if I miss a dose (Palynziq)?

Skip the missed dose and use your next dose at the regular time. Do not use two doses at one time.

What happens if I overdose (Palynziq)?

Seek emergency medical attention or call the Poison Help line at 1-800-222-1222.

What should I avoid while using pegvaliase (Palynziq)?

Avoid injecting pegvaliase into skin that is red, bruised, hard, tender, injured, or irritated. Do not inject this medicine into skin areas with moles, scars, birthmarks, or tattoos.

What other drugs will affect pegvaliase (Palynziq)?

Other drugs may affect pegvaliase, including prescription and over-the-counter medicines, vitamins, and herbal products. Tell your doctor about all your current medicines and any medicine you start or stop using.

Where can I get more information (Palynziq)?

Your pharmacist can provide more information about pegvaliase.

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.
Every effort has been made to ensure that the information provided by Cerner Multum, Inc. ('Multum') is accurate, up-to-date, and complete, but no guarantee is made to that effect. Drug information contained herein may be time sensitive. Multum information has been compiled for use by healthcare practitioners and consumers in the United States and therefore Multum does not warrant that uses outside of the United States are appropriate, unless specifically indicated otherwise. Multum's drug information does not endorse drugs, diagnose patients or recommend therapy. Multum's drug information is an informational resource designed to assist licensed healthcare practitioners in caring for their patients and/or to serve consumers viewing this service as a supplement to, and not a substitute for, the expertise, skill, knowledge and judgment of healthcare practitioners. The absence of a warning for a given drug or drug combination in no way should be construed to indicate that the drug or drug combination is safe, effective or appropriate for any given patient. Multum does not assume any responsibility for any aspect of healthcare administered with the aid of information Multum provides. The information contained herein is not intended to cover all possible uses, directions, precautions, warnings, drug interactions, allergic reactions, or adverse effects. If you have questions about the drugs you are taking, check with your doctor, nurse or pharmacist.

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Reviewed on 3/17/2022

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