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Vectibix

Generic Name: panitumumab (PAN-i-TOOM-ue-mab)
Brand Name: Vectibix

Skin problems, including acne-like rash, cracking, dryness, infection of the fingernails or toenails, itching, and redness, are common with Vectibix. Severe skin problems, including swollen, blistered, or peeling skin; skin infection; and infected sores (abscesses), may also occur. Serious and sometimes fatal systemic infections have also occurred along with severe skin problems. Be sure to report any unusual skin changes to your doctor right away.

Rarely, serious and sometimes fatal infusion reactions have occurred in patients while receiving Vectibix. Symptoms may include chills; dizziness or light-headedness; fainting; fever; hives; rash; swelling of the mouth, face, lips, or tongue; tightness in the chest; trouble breathing; or unusual hoarseness. Tell your doctor if you experience any of these symptoms or other unusual effects during an infusion. Discuss the risks and benefits of using Vectibix with your doctor.


Vectibix is used for:

Treating certain types of colon or rectal cancer that have spread to other parts of the body. It may also be used for other conditions as determined by your doctor.

Vectibix is a monoclonal antibody. It works to treat certain types of cancer by reducing the growth and survival of the cancer.

Do NOT use Vectibix if:

  • you are allergic to any ingredient in Vectibix
  • you have a certain gene mutation (KRAS) or if it is not known if you have this type of gene mutation

Contact your doctor or health care provider right away if this applies to you.

Slideshow: 2014 Update: First Time Brand-to-Generic Switches

Before using Vectibix:

Some medical conditions may interact with Vectibix. Tell your doctor or pharmacist if you have any medical conditions, especially if any of the following apply to you:

  • if you are pregnant, planning to become pregnant, or are breast-feeding
  • if you are taking any prescription or nonprescription medicine, herbal preparation, or dietary supplement
  • if you have allergies to medicines, foods, or other substances
  • if you have a history of lung problems (eg, pulmonary fibrosis), skin problems, or eye problems
  • if you have low blood calcium, magnesium, or potassium levels
  • if you have diarrhea or you are dehydrated
  • if you are scheduled to receive a vaccine
  • if you are receiving other chemotherapy medicines (eg, bevacizumab)

Some MEDICINES MAY INTERACT with Vectibix. Tell your health care provider if you are taking any other medicines, especially any of the following:

  • Other chemotherapy medicines (eg, bevacizumab) because they may increase the risk of Vectibix's side effects

This may not be a complete list of all interactions that may occur. Ask your health care provider if Vectibix may interact with other medicines that you take. Check with your health care provider before you start, stop, or change the dose of any medicine.

How to use Vectibix:

Use Vectibix as directed by your doctor. Check the label on the medicine for exact dosing instructions.

  • Vectibix is usually given as an injection at your doctor's office, hospital, or clinic. Contact your health care provider if you have any questions.
  • Vectibix is a colorless solution that may contain a very small amount of clear to white particles. Do not use Vectibix if it contains a large amount of particles, is cloudy or discolored, or if the vial is cracked or damaged.
  • Do not shake Vectibix.
  • Keep this product, as well as syringes and needles, out of the reach of children and away from pets. Do not reuse needles, syringes, or other materials. Ask your health care provider how to dispose of these materials after use. Follow all local rules for disposal.
  • If you miss a dose of Vectibix, contact your doctor right away.

Ask your health care provider any questions you may have about how to use Vectibix.

Important safety information:

  • Vectibix often causes skin reactions. Exposure to sunlight may make this worse. Avoid the sun, sunlamps, or tanning booths while you use Vectibix and for 2 months after you stop using it. Use sunscreen and wear protective clothing if you must be outside for more than a short time.
  • Tell your doctor or dentist that you take Vectibix before you receive any medical or dental care, emergency care, or surgery.
  • If vomiting or diarrhea occurs, you will need to take care not to become dehydrated. Contact your doctor for instructions.
  • Lab tests, including blood electrolytes, may be performed while you use Vectibix and for 8 weeks after you stop Vectibix. These tests may be used to monitor your condition or check for side effects. Be sure to keep all doctor and lab appointments.
  • Women who are able to become pregnant must use an effective form of birth control while using Vectibix. You will need to continue to use birth control while you use Vectibix and for 6 months after you stop using it. If you have questions about effective birth control, talk with your doctor.
  • Men who use Vectibix should always use a condom when having sex with a woman who may become pregnant. Do this for as long as you use Vectibix and for 6 months after you stop using it.
  • Vectibix should be used with extreme caution in CHILDREN; safety and effectiveness in children have not been confirmed.
  • PREGNANCY and BREAST-FEEDING: Vectibix may cause harm to the fetus. Do not become pregnant while you are using it. If you think you may be pregnant, contact your doctor. You will need to discuss the benefits and risks of using Vectibix while you are pregnant. It is not known if Vectibix is found in breast milk. Do not breast-feed while you use Vectibix and for 2 months after you stop using it.

Possible side effects of Vectibix:

All medicines may cause side effects, but many people have no, or minor, side effects. Check with your doctor if any of these most COMMON side effects persist or become bothersome:

Constipation; diarrhea; eyelash growth; mild acne; mild dryness, itching, or redness of the skin; nausea; stomach pain; tiredness; vomiting.

Seek medical attention right away if any of these SEVERE side effects occur:

Severe allergic reactions (rash; hives; itching; difficulty breathing or swallowing; tightness in the chest; swelling of the mouth, face, lips, throat, or tongue; unusual hoarseness); chest pain; coughing up blood; discharge from the eye; dry mouth or eyes; increased tearing; irritation, pain, redness, or swelling of the eye or eyelid; irritation, redness, swelling, or sores in or around the mouth; moderate to severe skin changes (eg, blistered, cracking, peeling, swollen, or painful skin; moderate to severe acne; moderate to severe redness or itching); new or worsening lung or breathing problems (eg, cough, shortness of breath, wheezing); pain, redness, or swelling at the injection site; pain, redness, or swelling near the nailbed; severe or persistent constipation, diarrhea, nausea, stomach pain, or vomiting; signs of infection (eg, chills, fever, sore throat); sluggishness; swelling of the ankles, feet, or hands; symptoms of low blood magnesium levels (eg, irregular heartbeat; mental or mood changes; muscle aches, cramps, pain, spasms, or weakness; seizures; tremor; loss of appetite); vision changes; weakness.

This is not a complete list of all side effects that may occur. If you have questions about side effects, contact your health care provider. Call your doctor for medical advice about side effects. To report side effects to the appropriate agency, please read the Guide to Reporting Problems to FDA.

If OVERDOSE is suspected:

Contact 1-800-222-1222 (the American Association of Poison Control Centers), your local poison control center, or emergency room immediately. Symptoms may include diarrhea; dry mouth or eyes; skin problems; sluggishness; tiredness; weakness.

Proper storage of Vectibix:

Vectibix is usually handled and stored by a health care provider. If you are using Vectibix at home, store Vectibix as directed by your pharmacist or health care provider. Keep Vectibix out of the reach of children and away from pets.

General information:

  • If you have any questions about Vectibix, please talk with your doctor, pharmacist, or other health care provider.
  • Vectibix is to be used only by the patient for whom it is prescribed. Do not share it with other people.
  • If your symptoms do not improve or if they become worse, check with your doctor.
  • Check with your pharmacist about how to dispose of unused medicine.

This information should not be used to decide whether or not to take Vectibix or any other medicine. Only your health care provider has the knowledge and training to decide which medicines are right for you. This information does not endorse any medicine as safe, effective, or approved for treating any patient or health condition. This is only a brief summary of general information about Vectibix. It does NOT include all information about the possible uses, directions, warnings, precautions, interactions, adverse effects, or risks that may apply to Vectibix. This information is not specific medical advice and does not replace information you receive from your health care provider. You must talk with your healthcare provider for complete information about the risks and benefits of using Vectibix.

Issue Date: April 2, 2014
Database Edition 14.2.1.001
Copyright © 2014 Wolters Kluwer Health, Inc.

Disclaimer: This information should not be used to decide whether or not to take this medicine or any other medicine. Only your health care provider has the knowledge and training to decide which medicines are right for you. This information does not endorse any medicine as safe, effective, or approved for treating any patient or health condition. This is only a brief summary of general information about this medicine. It does NOT include all information about the possible uses, directions, warnings, precautions, interactions, adverse effects, or risks that may apply to this medicine. This information is not specific medical advice and does not replace information you receive from your health care provider. You must talk with your healthcare provider for complete information about the risks and benefits of using this medicine.

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