Drug Formulary information is intended for use by healthcare professionals. It is not intended to be medical advice. Some of the information, including information about funding for cancer drugs, does not apply to all patients. Cancer treatment plans are unique to each patient. If you are a patient, please speak with your healthcare team to understand how this information applies to you.
Severe weather warning in your area. Please stay indoors and stay safe. Read more
drug-infosheet
oFAtumumab
Other Name: Arzerra®
- For treating patients with chronic lymphocytic leukemia (CLL) given alone, or in combination with another medication.
- Tell your doctor if you have/had significant medical condition(s), especially if you have / had heart or lung problems, hepatitis or liver disease, active infections or history of infections, or if you have any allergies.
- Your doctor will test your blood for exposure to hepatitis B virus before starting treatment
- People who have cancer or leukemia are at a higher risk of developing other cancers/leukemias (usually some years later) or blood clots. Some cancer medications may increase these risks, especially if used for a prolonged period of time. You should discuss any concerns with your doctor.
- oFAtumumab can harm the unborn baby and should not be used by pregnant women.
- If there is ANY chance that you or your partner may become pregnant, you and your partner together must: ► Use 2 effective forms of birth control at the same time while receiving this drug: Keep using birth control until at least 6 months after the last dose (general recommendation). Discuss with your healthcare team.
- Tell your doctor right away if you or your partner becomes pregnant.
- Do not breastfeed while using this drug
- Effects on Fertility: Unlikely
- Effects on Fertility: Unlikely
This drug is given by injection into a vein.
This drug will be given over a longer period of time for the first cycle. If you have no problems with this infusion, it will be given over a shorter time for the following cycles.
- You will be given drug(s) before ofatumumab to prevent a reaction.
Although it is unlikely that other medications can affect your treatment, make sure your health care team knows about all of your medicines (prescription or over-the-counter medications, herbals and supplements). Check with your health care team before starting or stopping any of them.
For mild aches and pain:
- You may take acetaminophen (Tylenol®) tablets. Ask your health care team about the right dose for you.
- Ibuprofen (Advil®, Motrin®), naproxen (Aleve®) or aspirin (acetylsalicylic acid, ASA), including low dose aspirin for heart conditions, may increase your chance of bleeding.
- Talk to your health care team before you start or stop these medications.
- If you feel unwell, take your temperature before taking any of these medications. They may hide a fever.
- Talk to your health care team or go to the closest emergency room right away if you have a fever. See the Fever pamphlet for more information.
Common side effects usually occur in more than 1 out of every 10 patients. Other side effects are less common, but may be severe. You may not have all of the side effects below. You may have side effects that are not listed.
|
|||||
Cough; Feeling short of breath
|
Contact your health care team if no improvement or if severe | ||||
Unusual bleeding or bruising You may have black stools, cough up blood, blood in your urine, purple or red dots on your skin or bleeding that will not stop. Fever, chills, infection You have a fever if your temperature taken in your mouth (oral temperature) is:
While you are getting chemotherapy treatments:
If you have a fever, talk to your health care team or go to the closest emergency room. |
Get emergency medical help right away | ||||
Diarrhea
|
Contact your health care team if no improvement or if severe | ||||
Tiredness
|
Contact your health care team if no improvement or if severe | ||||
Infections that happen when the immune system is impaired (usually by viruses, bacteria or fungi that would not normally result in infections in patients with normal immunity) |
Get emergency medical help right away | ||||
Nausea and vomiting (generally mild)
|
Contact your health care team if no improvement or if severe | ||||
Rash; dry, itchy skin (may be severe)
|
Contact your health care team if no improvement or if severe | ||||
Mild swelling in arms and legs; puffiness
|
Contact your health care team if no improvement or if severe | ||||
Headache; mild joint, muscle pain or cramps
|
Contact your health care team if no improvement or if severe | ||||
|
|||||||
Heart problems
|
Get emergency medical help right away | ||||||
Drug reaction (fever, severe rash, itchiness, flushing, dizziness, shortness of breath, chest or throat tightness)
|
Get emergency medical help right away | ||||||
Blood clot (limb pain or swelling, hardened vein in limb), may occur in lungs (sudden start of coughing, breathing problems, chest pain, coughing blood) Blockage of an artery (blood vessel) in your heart, brain, chest, belly, or limbs; this may result in stroke (sudden loss of vision, speech, or the use of your limb(s)) or heart attack (chest pain, shortness of breath), or pain in chest, belly or limb |
Get emergency medical help right away | ||||||
Blocked intestines |
Get emergency medical help right away | ||||||
Effects on the brain (confusion, difficulty with thinking, speaking, movement or balance, blurred and/or loss of vision, weakness on one side of the body) |
Get emergency medical help right away | ||||||
Rapid killing of cancer cells when you start treatment may lead to build up of cell waste products
|
Get emergency medical help right away | ||||||
For more links on how to manage your symptoms go to https://www.cancercareontario.ca/en/symptom-management.
The information set out in the medication information sheets, regimen information sheets, and symptom management information (for patients) contained in the Drug Formulary (the "Formulary") is intended to be used by health professionals and patients for informational purposes only. The information is not intended to cover all possible uses, directions, precautions, drug interactions or side effects of a certain drug, nor should it be used to indicate that use of a particular drug is safe, appropriate or effective for a given condition.
A patient should always consult a healthcare provider if he/she has any questions regarding the information set out in the Formulary. The information in the Formulary is not intended to act as or replace medical advice and should not be relied upon in any such regard. All uses of the Formulary are subject to clinical judgment and actual prescribing patterns may not follow the information provided in the Formulary.
Last Updated: July 21, 2026