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Necitumumab (Intravenous)

Generic name: necitumumab

Brand names: Portrazza

Last updated December 3, 2025 0 views
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Uses for necitumumab

Necitumumab injection is used along with gemcitabine and cisplatin to treat squamous non-small cell lung cancer that has spread.

Necitumumab works by interfering with the growth of cancer cells, which are eventually destroyed by the body. Since necitumumab may also affect the growth of normal body cells, it can cause other unwanted effects. Some of these effects can be serious and need to be reported to your doctor. Some unwanted effects, like a skin rash, may not be serious but can still cause concern. Additionally, some unwanted effects may not appear until months or years after using the medicine.

This medicine should be given only by or under the supervision of your doctor.

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Precautions while using necitumumab

It is very important that your doctor check your progress at regular visits to make sure this medicine is working properly and to check for unwanted effects. Blood tests may be needed to check for unwanted effects.

Using this medicine while you are pregnant can harm your unborn baby. Use an effective form of birth control to prevent pregnancy during therapy and for 3 months after the last dose of this medicine. If you think you have become pregnant while using the medicine, tell your doctor right away.

Hypomagnesemia may occur while you are receiving this medicine. Tell your doctor right away if you experience drowsiness, changes in mood or mental state, muscle spasms or twitching, seizures, or unusual tiredness or weakness after receiving this medicine.

Blood clots may occur while you are receiving this medicine. Call your doctor if you have chest pain that may spread to your arms, jaw, back, or neck, are coughing up blood, feel nauseous, experience numbness or weakness in your arm or leg, or on one side of your body, have a sudden or severe headache, or have problems with vision, speech, or walking, trouble breathing, or unusual sweating.

This medicine may make your skin more sensitive to sunlight. Use sunscreen when you are outdoors. Avoid sunlamps and tanning beds.

Infusion-related reactions may occur while you are receiving this medicine. Tell your doctor right away if you have any of the following symptoms: back pain, chest tightness, chills, fever, flushing, headache, nausea and vomiting, weakness, or trouble breathing.

This section was rewritten for readability and reviewed for meaning.

Before using necitumumab

In deciding to use a medicine, you and your doctor need to consider the risks of taking the medicine compared to the benefits it may provide. For this medicine, the following factors should be thought about:

Allergies

Inform your doctor if you have ever had any unusual or allergic reactions to this medicine or any other medicines. Also, let your healthcare professional know if you have other types of allergies, such as to foods, dyes, preservatives, or animals. For non-prescription products, read the label or package ingredients carefully.

Pediatric

There have not been appropriate studies on how age affects the effects of necitumumab injection in children. Safety and effectiveness have not been established.

Geriatric

Studies so far have not shown any specific problems in older adults that would limit the usefulness of necitumumab injection. However, older patients are more likely to experience blood clots (e.g., pulmonary embolism), which may require caution when using necitumumab injection.

Breast Feeding

There are no adequate studies in women to determine the risk to infants when using this medication while breastfeeding. Weigh the potential benefits against the potential risks before taking this medication during breastfeeding.

Interactions with Medicines

Some medicines should not be used together at all, while in other instances, two different medicines may be used together even if an interaction could happen. In these cases, your doctor may need to adjust the dose, or other precautions may be necessary. Inform your healthcare professional if you are taking any other prescription or nonprescription (over-the-counter [OTC]) medicines.

Interactions with Food/Tobacco/Alcohol

Certain medicines should not be used around mealtime or with certain types of food due to possible interactions. Using alcohol or tobacco with some medicines may also lead to interactions. Discuss with your healthcare professional the use of your medicine with food, alcohol, or tobacco.

Other Medical Problems

Having other medical problems may affect the use of this medicine. Be sure to tell your doctor if you have any other medical issues, especially:

  • Blood clots (e.g., deep vein thrombosis, pulmonary embolism) or
  • Hypomagnesemia (low magnesium in the blood)—Use with caution. May worsen these conditions.

This section was rewritten for readability and reviewed for meaning.

Side Effects of necitumumab

Along with its needed effects, a medicine may cause some unwanted effects. Although not all of these side effects may occur, if they do occur they may need medical attention.

Check with your doctor or nurse immediately if any of the following side effects occur:

More common

  • Abdominal or stomach cramps
  • confusion
  • convulsions
  • decreased urine
  • difficulty with breathing
  • drowsiness
  • dry mouth
  • increased thirst
  • irregular heartbeat
  • loss of appetite
  • mood or mental changes
  • muscle cramps in the hands, arms, feet, legs, or face
  • muscle pain or muscle spasms (tetany) or twitching
  • nausea or vomiting
  • numbness and tingling around the mouth, fingertips, or feet
  • tremor
  • unusual tiredness or weakness

Less common

  • Anxiety
  • back pain
  • chest pain or discomfort
  • chest tightness
  • chills
  • cough
  • difficulty with speaking
  • dizziness or lightheadedness
  • double vision
  • fainting
  • fast heartbeat
  • fever
  • flushing
  • headache
  • heart stops
  • inability to move the arms, legs, or facial muscles
  • no breathing
  • no pulse or blood pressure
  • pain or discomfort in the arms, jaw, back, or neck
  • pain, redness, or swelling in the arm or leg
  • pains in the chest, groin, or legs, especially the calves of the legs
  • severe headaches of sudden onset
  • slow speech
  • sudden loss of coordination
  • sudden onset of slurred speech
  • sudden shortness of breath or troubled breathing
  • sudden vision changes
  • sweating
  • trouble breathing
  • unconscious

Some side effects may occur that usually do not need medical attention. These side effects may go away during treatment as your body adjusts to the medicine. Also, your health care professional may be able to tell you about ways to prevent or reduce some of these side effects. Check with your health care professional if any of the following side effects continue or are bothersome or if you have any questions about them:

More common

  • Blemishes on the skin
  • burning, dry, or itching eyes
  • decreased weight
  • diarrhea
  • discharge or excessive tearing
  • dry skin
  • itching skin or rash
  • loosening of the fingernails
  • pimples
  • rash with flat lesions or small raised lesions on the skin
  • redness or soreness around the fingernails
  • redness, pain, or swelling of the eye, eyelid, or inner lining of the eyelid
  • swelling or inflammation of the mouth

Other side effects not listed may also occur in some patients. If you notice any other effects, check with your healthcare professional.

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

In the U.S.

  • Portrazza

Available Dosage Forms:

  • Solution

Therapeutic Class: Antineoplastic Agent

Pharmacologic Class: Monoclonal Antibody

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Proper use of necitumumab

A nurse or other trained health professional will give you this medicine. This medicine is given through a needle placed in one of your veins. It must be given slowly, so the needle will remain in place for 60 minutes and the infusion will be given on Day 1 and 8 of each 3-week cycle.

You may also receive medicines to help prevent possible allergic reactions to the injection.

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.