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Health Guide

Trastuzumab/Hyaluronidase-oysk (By injection)

Hyaluronidase-oysk (hye-al-ure-ON-i-dase - oysk), Trastuzumab (tras-TOOZ-oo-mab)

Treats breast cancer.

Brand Name(s):

Herceptin Hylecta

There may be other brand names for this medicine.

When This Medicine Should Not Be Used:

This medicine is not right for everyone. You should not receive it if you had an allergic reaction to trastuzumab or hyaluronidase-oysk, or if you are pregnant.

How to Use This Medicine:

Injectable

  • Your doctor will prescribe your exact dose and tell you how often it should be given. This medicine is given as a shot under your skin.
  • You will receive this medicine while you are in a hospital or cancer treatment center. A nurse or other trained health professional will give you this medicine.
  • Missed dose: This medicine needs to be given on a fixed schedule. If you miss a dose, call your doctor, home health caregiver, or treatment clinic for instructions.

Drugs and Foods to Avoid:

Ask your doctor or pharmacist before using any other medicine, including over-the-counter medicines, vitamins, and herbal products.

  • Do not use an anthracycline medicine for up to 7 months after stopping treatment with this medicine.

Warnings While Using This Medicine:

  • It is not safe to take this medicine during pregnancy. It could harm an unborn baby. Tell your doctor right away if you become pregnant. Use an effective form of birth control during treatment with this medicine and for 7 months after your last dose.
  • Tell your doctor if you are breastfeeding, or if you have heart disease, heart failure, or lung disease (including lung tumor).
  • This medicine may cause the following problems:
    • Heart problems, including heart failure, heart rhythm problems, thickening of the heart, or high blood pressure
    • Lung or breathing problems
  • Medicines used to treat cancer are very strong and can have many side effects. Before receiving this medicine, make sure you understand all the risks and benefits. It is important for you to work closely with your doctor during your treatment.
  • This medicine may make you bleed, bruise, or get infections more easily. Take precautions to prevent illness and injury. Wash your hands often.
  • Your doctor will do lab tests at regular visits to check on the effects of this medicine. Keep all appointments.

Possible Side Effects While Using This Medicine:

Call your doctor right away if you notice any of these 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
  • Chest pain, trouble breathing, fast, slow, or uneven heartbeat
  • Fever, chills, cough, runny or stuffy nose, sore throat, body aches
  • Lightheadedness, dizziness, fainting, vomiting, headache
  • Rapid weight gain, swelling in your hands, ankles, or feet
  • Unusual bleeding, bruising, or weakness

If you notice these less serious side effects, talk with your doctor:

  • Bone, muscle, or joint pain
  • Discoloration of the fingernails or toenails
  • Hair loss or thinning of hair
  • Nausea, diarrhea, decreased appetite, stomach pain
  • Pain, redness, itching, burning, swelling, or a lump under your skin where the shot is given

If you notice other side effects that you think are caused by this medicine, tell your doctor

Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088


Last Updated: 8/2/2019
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