April 26, 2017
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(ofatumumab) Intravenous Administration



  • Hepatitis B Virus (HBV) reactivation can occur in patients receiving CD20-directed cytolytic antibodies, including ARZERRA®, in some cases resulting in fulminant hepatitis, hepatic failure, and death [see WARNINGS AND PRECAUTIONS].
  • Progressive Multifocal Leukoencephalopathy (PML) resulting in death can occur in patients receiving CD20-directed cytolytic antibodies, including ARZERRA [see WARNINGS AND PRECAUTIONS].


ARZERRA (ofatumumab) is an IgG1κ human monoclonal antibody with a molecular weight of approximately 149 kDa. The antibody was generated via transgenic mouse and hybridoma technology and is produced in a recombinant murine cell line (NS0) using standard mammalian cell cultivation and purification technologies.

ARZERRA is a sterile, clear to opalescent, colorless, preservative-free liquid concentrate for intravenous administration. ARZERRA is supplied at a concentration of 20 mg/mL in single-use vials. Each single-use vial contains either 100 mg ofatumumab in 5 mL of solution or 1,000 mg ofatumumab in 50 mL of solution.

Inactive ingredients include: 10 mg/mL arginine, diluted hydrochloric acid, 0.019 mg/mL edetate disodium, 0.2 mg/mL polysorbate 80, 6.8 mg/mL sodium acetate, 2.98 mg/mL sodium chloride, and Water for Injection, USP. The pH is 5.5.

What are the possible side effects of ofatumumab (Arzerra)?

Some people receiving a ofatumumab injection have had a reaction to the infusion (when the medicine is injected into the vein). Tell your caregiver right away if you feel dizzy, nauseated, light-headed, confused, itchy, tingly, or have chest pain, jaw or arm pain, back pain, stomach pain, wheezing, chest tightness, or trouble breathing. These reactions can occur during the injection or within 24 hours afterward..

Get emergency medical help if you have any of these signs of an allergic reaction: hives; difficult breathing; swelling of your face, lips, tongue, or...

Read All Potential Side Effects and See Pictures of Arzerra »

What are the precautions when taking ofatumumab injection (Arzerra)?

Before receiving this medication, tell your doctor or pharmacist if you are allergic to it; or if you have ever had a severe reaction to it; or if you have any other allergies. This product may contain inactive ingredients, which can cause allergic reactions or other problems. Talk to your pharmacist for more details.

Before using this medication, tell your doctor or pharmacist your medical history, especially of: breathing problems (such as chronic obstructive pulmonary disease - COPD, asthma), liver disease (such as hepatitis B), heart disease (such as chest pain, heart attack), immune system problems (such as HIV).

This drug may make you dizzy. Do not drive, use machinery, or do any activity that requires alertness until you are sure you can perform such activities...

Read All Potential Precautions of Arzerra »

Last reviewed on RxList: 1/9/2017
This monograph has been modified to include the generic and brand name in many instances.

Arzerra - User Reviews

Arzerra User Reviews

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Here is a collection of user reviews for the medication Arzerra sorted by most helpful. Patient Discussions FAQs

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