Pegvaliase-Pqpz Injection


Pegvaliase-pqpz injection is used along with a specific diet to reduce blood phenylalanine levels in people who have phenylketonuria (PKU; an inborn condition in which phenylalanine may build up in the blood and causes decreased intelligence and a decreased ability to focus, remember, and organize information) and who have uncontrolled blood phenylalanine levels. Pegvaliase-pqpz injection is in a class of medications called enzymes. It works by helping to reduce the amount of phenylalanine in the body.

Side Effects Of Pegvaliase-Pqpz Injection

Pegvaliase-pqpz injection may cause side effects. Tell your doctor if any of these symptoms are severe or do not go away:

  • redness, itching, pain, bruising, rash, swelling, tenderness at the injection site
  • joint pain
  • headache
  • stomach pain
  • mouth and throat pain
  • feeling tired
  • anxiety
  • hair loss

Some side effects can be serious. If you experience any of these symptoms or those listed in the WARNINGS and PRECAUTIONS section, stop using pegvaliase-pqpz injection and call your doctor immediately or get emergency medical treatment:

  • rash, itching, hives, or skin redness that lasts at least 14 days
  • Pegvaliase-pqpz injection may cause other side effects. Call your doctor if you have any unusual problems while using this medication.

Warnings & Precautions

Before using pegvaliase-pqpz injection:

  • tell your doctor and pharmacist if you are allergic to pegvaliase, any other medications, or any of the ingredients in pegvaliase-pqpz injection. Ask your pharmacist or check the Medication Guide for a list of the ingredients.
  • tell your doctor and pharmacist what other prescription and nonprescription medications, vitamins, nutritional supplements, and herbal products you are taking or plan to take. Be sure to mention any of the following: other PEGylated medications such as griseofulvin (Gris-Peg), medroxyprogesterone (Depo-Provera, in others), or peg-interferon medications (Pegasys, Peg-Intron, Sylatron, others). Your doctor may need to change the doses of your medications or monitor you carefully for side effects.
  • tell your doctor if you are pregnant, plan to become pregnant, or are breastfeeding. If you become pregnant while using pegvaliase-pqpz injection, call your doctor.

Dosage Of Pegvaliase-Pqpz Injection

Pegvaliase-pqpz injection comes as a solution (liquid) to inject subcutaneously (just under the skin). It is usually injected once weekly for 4 weeks and then increased gradually over the next 5 weeks to once daily. Your doctor will change your dose based on your body’s response to the medication. Follow the directions on your prescription label carefully, and ask your doctor or pharmacist to explain any part you do not understand. Use pegvaliase-pqpz injection exactly as directed. Do not use more or less of it or use it more often than prescribed by your doctor.

Before you use pegvaliase-pqpz injection, look at the solution closely. The medication should be clear to pale yellow and free of floating particles. If the medication is cloudy, discolored, or contains particles, do not use it. Do not shake the prefilled syringe.

You may inject pegvaliase-pqpz injection on the front of your thighs or anywhere on your stomach except your navel (belly button) and the area 2 inches around it. If another person is injecting your medication, the top of the buttocks and the outer area of the upper arms also may be used. Do not inject the medication into the skin that is tender, bruised, red, hard, or not intact, or that has scars, moles, tattoos, or bruises. Choose a different spot each time you inject the medication, at least 2 inches away from a spot that you have used before. If more than one injection is needed for a single dose, the injection sites must be at least 2 inches away from each other but can be on the same part of the body or a different part of the body.


Do not let anyone else use your medication. Ask your pharmacist any questions you have about refilling your prescription.

It is important for you to keep a written list of all of the prescription and nonprescription (over-the-counter) medicines you are taking, as well as any products such as vitamins, minerals, or other dietary supplements. You should bring this list with you each time you visit a doctor or if you are admitted to a hospital. It is also important information to carry with you in case of emergencies.


All information has been provided courtesy of MedLinePlus from the National Library of Medicine and from the FDA.