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HER2 inhibitors intravenous solution (420 mg/14 mL)

Pertuzumab

Generic name: pertuzumab

Brand names: Perjeta

Used for breast cancer
Last updated November 3, 2026 0 views
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What is pertuzumab?

Pertuzumab is used along with other medicines (trastuzumab and docetaxel) to treat HER2-positive breast cancer.

Pertuzumab may also be used for reasons not mentioned in this medication guide.

This section was rewritten for readability and reviewed for meaning.

Warnings

Pertuzumab can cause birth defects or death to the unborn baby. Do not use if you are pregnant. Avoid getting pregnant while using pertuzumab, within 7 months of becoming pregnant, and for at least 7 months after your last dose.

Pertuzumab can cause life-threatening heart problems. Call your doctor right away if you have new or worsening cough, shortness of breath, or swelling in your lower legs.

This section was rewritten for readability and reviewed for meaning.

Before taking this medicine

You should not use pertuzumab if you are allergic to it, or if you are pregnant or breast-feeding.

Tell your doctor if you have ever had:

  • heart disease, congestive heart failure, heart rhythm disorder;
  • untreated or uncontrolled high blood pressure (hypertension);
  • a heart attack; or
  • radiation treatment in your chest area.

Pregnancy

Do not use pertuzumab during pregnancy or within 7 months of conception because it can cause harm to the fetus, including embryo-fetal death and birth defects. Your pregnancy status will be checked before starting treatment. Use effective contraception during treatment with pertuzumab and trastuzumab, and for at least 7 months after your last dose.

If you are exposed to pertuzumab in combination with trastuzumab during pregnancy or within 7 months before conception, contact Genentech at 1-888-835-2555. Your name may be included in a pregnancy registry to monitor the effects on the baby.

Breastfeeding

It may not be safe to breastfeed while using pertuzumab with trastuzumab, or for up to 7 months after your last dose. Talk to your doctor about the risks and benefits before breastfeeding.

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Pertuzumab side effects

Get emergency medical help if you notice signs of an allergic reaction: hives; difficulty breathing; swelling of your face, lips, tongue, or throat.

Some side effects may happen during the injection. Tell your caregiver immediately if you feel weak, tired, or nauseated, or if you experience a fast heartbeat, headache, fever, chills, muscle pain, or an unusual taste in your mouth.

Pertuzumab may cause serious side effects. Call your doctor right away if you have:

  • dizziness, pounding heartbeats or fluttering in your chest;
  • new or worsening cough or shortness of breath;
  • swelling in your lower legs;
  • low blood cell counts—fever, chills, mouth sores, skin sores, easy bruising, unusual bleeding, pale skin, cold hands and feet, feeling light-headed; or
  • signs of tumor cell breakdown—confusion, weakness, muscle cramps, nausea, vomiting, fast or slow heart rate, decreased urination, tingling in your hands and feet or around your mouth.

Your cancer treatments may be delayed or stopped permanently if you experience certain side effects.

Common side effects are more likely to occur, such as:

  • nausea, diarrhea;
  • temporary hair loss;
  • fever, low blood cell counts;
  • tiredness;
  • rash; or
  • numbness, tingling, or burning pain in your hands or feet.

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.

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How is pertuzumab given?

Pertuzumab is given as an infusion into a vein. A healthcare provider will give you this injection.

Pertuzumab is usually given once every 3 weeks. Follow your doctor's instructions.

Pertuzumab can cause life-threatening heart problems. Your heart function may need to be checked before you start using pertuzumab and during your treatment.

What happens if I miss a dose?

Call your doctor for instructions if you miss an appointment for your Perjeta injection.

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What happens if I overdose?

Since this medication is given by a healthcare professional in a medical setting, an overdose is unlikely to happen.

Follow your doctor's instructions about any limits on food, drinks, or activities.

This section was rewritten for readability and reviewed for meaning.

What other drugs will affect pertuzumab?

Other drugs may affect pertuzumab, 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.

Biosimilar and interchangeable products are biological products that are very similar to and have no important differences from the reference product.

Reference products

These are biological products that have already been approved by the FDA, against which biosimilar products are compared. There is 1 for pertuzumab.

Perjeta (pertuzumab) - Genentech, Inc.

Formulation typeStrength
Single-Dose Vial420 mg/14 mL

View Perjeta information in detail.

Perjeta interchangeable products

Interchangeable biosimilar products can be dispensed by a pharmacist without needing approval from the prescriber of the reference product.

Pharmacy laws for biosimilar prescribing may vary by state.

Poherdy (pertuzumab-dpzb) - Shanghai Henlius Biotech, Inc.

Formulation typeStrength
Single-Dose Vial420 mg/14 mL (30 mg/mL)

Poherdy

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Common questions about pertuzumab

How well does Enhertu work in metastatic breast cancer?
Enhertu improved progression-free survival and lowered recurrence risk in studies of metastatic and early-stage HER2-positive breast cancer. Clinical trials showed longer progression-free survival, lower progression or death risk, higher pathologic complete response rates before surgery, and fewer recurrences after surgery versus standard HER2-targeted treatments. Continue reading
How long can you stay on Herceptin and Perjeta?
If you are receiving Perjeta for treatment of HER2+ early breast cancer, you may continue treatments with Herceptin every 3 weeks for one year (18 cycles total). For the treatment of HER2+ metastatic breast cancer, you will receive Perjeta and Herceptin until the medicine no longer controls your breast cancer or you have side effects that require you to stop treatment. You may receive other treatments with these medications. Continue reading
How much does Perjeta cost?
Perjeta (generic name: pertuzumab) is an expensive targeted therapy for HER2-positive breast cancer. When it launched, Genentech set its price at about $5,900 per month — roughly $71,000 a year for Perjeta alone. Because it is almost always given together with Herceptin (trastuzumab) and chemotherapy, the cost of a full course of treatment can run well over $100,000. Continue reading
Is Perjeta a chemotherapy drug?
Perjeta (pertuzumab) is considered a targeted cancer therapy, which is different from chemotherapy. Chemotherapy kills cancer cells that grow rapidly, but may also affect normal cells. Targeted drug therapy like Perjeta attacks HER2 proteins on certain cancer cells that cause rapid growth. However, Perjeta may also affect these proteins on healthy cells (which occur in fewer amounts). Continue reading

Related medicines

Before you take this medicine: the information on this page is general and may not cover your personal circumstances. Read the label supplied with your medicine and ask a pharmacist or doctor if you are unsure, especially if you are pregnant, breastfeeding, taking other medicines or managing a long-term condition.
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Content is provided for education and is not medical advice. See our medical disclaimer.