CETUXIMAB is a monoclonal antibody. It is used to treat colorectal cancer and head and neck cancer. Compare EGFR inhibitors.

What is Cetuximab?

Commonly Used Brand Name(s)Erbitux

Therapeutic ClassificationsAntineoplastic Agent

Pharmacologic ClassificationsMonoclonal Antibody



Blackbox WarningTOP

Intravenous route (Solution)

Serious and potentially fatal infusion reactions may occur and require immediate interruption of the cetuximab infusion and permanent discontinuation. Cardiopulmonary arrest and/or sudden death have been reported in patients with squamous cell carcinoma of the head and neck treated with radiation therapy and cetuximab or platinum-based therapy with 5-fluorouracil and cetuximab. Monitoring of serum electrolytes during and after cetuximab therapy is recommended .


Cetuximab injection is given with radiation treatment and other medicines to treat cancer in the colon and rectal area, and cancer in the head and neck area. This medicine is usually given to patients who have already received other cancer treatments. Cetuximab should only be used in patients with metastatic (cancer that spreads to other parts of the body) colon or rectal cancer who have had a KRAS gene mutation test. This test helps the doctor decide whether the medicine will treat their cancer.

Cetuximab interferes with the growth of cancer cells, which are then destroyed by the body. Since the growth of normal body cells may also be affected by cetuximab, other effects will also occur. Some of these may be serious and must be reported to your doctor. Other effects, such as a skin rash, may not be serious but may cause concern. Some effects do not occur until months or years after the medicine is used.

Before you begin treatment with cetuximab, you and your doctor should talk about the benefits this medicine will do as well as the risks of using it.

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

Proper UseTOP

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. This medicine is given through a needle placed in one of your veins. Cetuximab needs to be given slowly, so the needle will remain in place for at least an hour. The first dose of this medicine could take 2 hours to give.

You may also receive medicines (e.g., diphenhydramine) to help prevent possible allergic reactions to the injection.

This medicine sometimes causes nausea and vomiting. However, it is very important that you continue to receive the medicine, even if you begin to feel ill. Ask your doctor for ways to lessen these effects.

Before UsingTOP

In deciding to use a medicine, the risks of taking the medicine must be weighed against the good it will do. This is a decision you and your doctor will make. For this medicine, the following should be considered:


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


Appropriate studies have not been performed on the relationship of age to the effects of cetuximab injection in the pediatric population. Safety and efficacy have not been established.


Appropriate studies performed to date have not demonstrated geriatric-specific problems that would limit the usefulness of cetuximab injection in the elderly.


Pregnancy CategoryExplanation
All TrimestersCAnimal studies have shown an adverse effect and there are no adequate studies in pregnant women OR no animal studies have been conducted and there are no adequate studies in pregnant women.

Breast FeedingTOP

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

Drug InteractionsTOP

Although certain medicines should not be used together at all, in other cases two different medicines may be used together even if an interaction might occur. In these cases, your doctor may want to change the dose, or other precautions may be necessary. Tell your healthcare professional if you are taking any other prescription or nonprescription (over-the-counter [OTC]) medicine.

Other InteractionsTOP

Certain medicines should not be used at or around the time of eating food or eating certain types of food since interactions may occur. Using alcohol or tobacco with certain medicines may also cause interactions to occur. Discuss with your healthcare professional the use of your medicine with food, alcohol, or tobacco.

Other Medical ProblemsTOP

The presence of other medical problems may affect the use of this medicine. Make sure you tell your doctor if you have any other medical problems, especially:


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

Cetuximab may cause a serious side effect called an infusion reaction. This can be life-threatening and require immediate medical attention. Tell your doctor or nurse right away if you have a fever, chills, trouble with breathing, lightheadedness, fainting, or chest pain within a few hours after you receive it.

Tell your doctor or nurse right away if you are having shortness of breath, cough, difficulty with breathing, or other breathing problems while being treated with this medicine. These may be symptoms of a serious lung problem.

Serious skin reactions can occur with this medicine. Check with your doctor right away if you have blistering, peeling, or loosening of the skin; dry skin; grooves or lines in the skin; red skin lesions; severe acne or skin rash; sores or ulcers on the skin; or fever or chills while you are using this medicine.

This medicine may make your skin more sensitive to sunlight. Use a sunscreen or sun-blocking lotion when you are outdoors. Wear protective clothing and hats. Avoid sunlamps and tanning beds.

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