Portrazza (necitumumab)

Portrazza® is approved as a treatment in combination with chemotherapy drugs gemcitabine and cisplatin for patients with metastatic (spread to distant parts of the body) squamous non-small cell lung cancer (NSCLC). Portrazza is a targeted therapy that is classified as a monoclonal antibody. Antibodies are a normal part of the immune system that attach to antigens (such as germs) to mark them for destruction by other components in the immune system. Monoclonal antibodies are created in a laboratory to attach to specific antigens on the surface of cancer cells. Portrazza is a monoclonal antibody that attaches to EGFR (epidermal growth factor receptors) and is an EGFR antagonist (blocks the EGFR pathway to inhibit cancer growth).1,2

About EGFR

EGFR is one of several receptor tyrosine kinases (RTKs). RTKs are cell-surface receptors that partner with ligands, proteins that activate the receptor to cause a specific action in the cell. In its normal capacity, EGFR triggers cell growth and division. When there is a mutation to the EGFR gene, such as is found in many cancer cells, the malignant (cancerous) cells are activated to divide, grow faster, and survive.3-5

Taking Portrazza

Portrazza is given as an infusion through an IV (intravenous) line. It is administered over 60 minutes on days 1 and 8 of each 3-week cycle prior to the infusion of gemcitabine and cisplatin. The dosage is determined by several factors, including the patient’s general health and ongoing response to treatment.2

Side Effects of Portrazza

Portrazza may cause side effects, and in some cases, these side effects can be severe. Any side effects should be reported to a health care professional. Side effects experienced in greater than 30% of patients taking Portrazza include skin reactions (rash, dry skin, itching, and/or redness) and lowered amounts of magnesium, calcium, and phosphorous in the blood. Less common side effects experienced in 10-29% of patients receiving Portrazza include vomiting, diarrhea, acne, weight loss, mouth sores, coughing up blood, and lowered amounts of potassium in the blood. Rarely, Portrazza can cause severe side effects, including serious heart and lung events. Patients taking Portrazza should seek medical care immediately if they experience any of the following symptoms: fever of 100.4°F or higher, mood changes, confusion, muscle pain or weakness, a heartbeat that feels abnormal, seizures, not feeling hungry, bad stomach upset, weakness on one side of the body, difficulty speaking or thinking, changes in balance, blurred eyesight, dizziness, passing out, or signs of a blood clot, such as chest pain, pressure, coughing up blood, shortness of breath, or swelling, warmth, numbness or pain in a leg or arm.2 This is not a complete list of side effects.

Precautions

Patients receiving Portrazza should talk to their doctor about other medications, herbal remedies, and any supplements they are taking, as well as any other health conditions. Patients should talk to their doctor before receiving immunizations or vaccinations while taking Portrazza to make sure they are appropriate. Patients who are pregnant or may become pregnant during treatment should discuss their condition with their doctor prior to starting Portrazza, as it may be hazardous to the fetus. It is not recommended for men or women to conceive a child while taking Portrazza, and patients are advised to use barrier methods of contraception (i.e. condoms) during treatment and for 3 months after final dose. It is not known whether Portrazza passes into breast milk, and patients should not breastfeed while taking Portrazza and for 3 months after final dose.2

Written by: Emily Downward | Last reviewed: October 2018.
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