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Ofatumumab, Injection oh-fah-TOO-moo-mab

What are other names for this medicine?

Type of medicine: antineoplastic (anticancer); monoclonal antibody

Generic and brand names: ofatumumab, injection; Arzerra

What is this medicine used for?

This medicine is given by IV infusion (slow drip through a needle into a large vein) to treat chronic lymphocytic leukemia when other anticancer medicines are not effective.

What should my healthcare provider know before I take this medicine?

Before taking this medicine, tell your healthcare provider if you have ever had:

  • an allergic reaction to any medicine
  • hepatitis B or other liver problems

Females of childbearing age: Tell your healthcare provider if you are pregnant or plan to become pregnant. It is not known whether this medicine will harm an unborn baby. Do not breast-feed while taking this medicine without your healthcare provider's approval.

How do I use it?

These infusions are given by your healthcare provider. Each infusion will be given over several hours. You will be monitored while you receive the medicine. How long you will need this treatment will be determined by your healthcare provider.

You will be given medicines before the infusion to help prevent side effects.

What should I watch out for?

You may get infections, including fungal infections, more easily when you are taking this medicine. Stay away from people with colds, flu, or other infections. Contact your healthcare provider right away if you develop a fever or ANY other symptoms of infection. Also, do not have any vaccines without getting your healthcare provider's approval first.

Your healthcare provider will check you regularly to see how this medicine affects you. Keep all appointments.

If you need emergency care, surgery, or dental work, tell the healthcare provider or dentist you are taking this medicine.

What are the possible side effects?

Along with its needed effects, your medicine may cause some unwanted side effects. Some side effects may be very serious. Some side effects may go away as your body adjusts to the medicine. Tell your healthcare provider if you have any side effects that continue or get worse.

Life-threatening (Report these to your healthcare provider right away. If you cannot reach your healthcare provider right away, get emergency medical care or call 911 for help): Allergic reaction (hives; itching; rash; trouble breathing; tightness or pain in your chest; swelling of your lips, tongue, and throat).

Serious (report these to your healthcare provider right away): Cough, fever, unexplained sore throat, confusion, trouble talking or walking, vision problems, severe headache, stiff neck, unusual bruising or bleeding, pinpoint red spots on the skin, yellow skin or eyes, unexplained tiredness or weakness, new or worsening stomach pain or nausea, fast heartbeat; unexplained swelling in hands or feet.

Other: Redness, swelling, or bruising around the injection site; headache; nausea; dizziness; runny nose; heartburn; back pain; diarrhea; trouble sleeping; sweating.

What products might interact with this medicine?

Some vaccinations should not be given while you are receiving this medicine, and some should not be given for several months after you stop receiving this medicine. Ask your healthcare provider about this.

If you are not sure if your medicines might interact, ask your pharmacist or healthcare provider. Keep a list of all your medicines with you. List all the prescription medicines, nonprescription medicines, supplements, natural remedies, and vitamins that you take. Be sure that you tell all healthcare providers who treat you about all the products you are taking.


This advisory includes selected information only and may not include all side effects of this medicine or interactions with other medicines. Ask your healthcare provider or pharmacist for more information or if you have any questions.

Keep all medicines out of the reach of children.

Do not share medicines with other people.


Developed by RelayHealth.
Medication Advisor 2012.1 published by RelayHealth.
Last modified: 2010-03-26
Last reviewed: 2010-01-29
This content is reviewed periodically and is subject to change as new health information becomes available. The information is intended to inform and educate and is not a replacement for medical evaluation, advice, diagnosis or treatment by a healthcare professional.
© 2012 RelayHealth and/or its affiliates. All rights reserved.
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