Kesimpta may cause serious side effects, including:
See Important information
Injection-related reactions. Injection-related reactions is a common side effect of Kesimpta. Injecting this medicine can cause injection-related reactions that can happen within 24 hours (1 day) following the first injections and with later injections. Talk with your healthcare provider if you have any of these signs and symptoms:
at or near the injection site: redness of the skin, swelling, itching and pain or
that may happen when certain substances are released in your body: fever, headache, pain in the muscles, chills, and tiredness.
Low immunoglobulins. Kesimpta may cause a decrease in some types of antibodies. Your healthcare provider will do blood tests to check your blood immunoglobulin levels.
The most common side effects of Kesimpta include:
upper respiratory tract infection, with symptoms such as sore throat and runny nose, and headache. See Important information
headache
These are not all the possible side effects of Kesimpta. Call your doctor for medical advice about side effects.
You may report side effects to FDA at 1-800-FDA-1088.
 Kesimpta side effects (more detail)
How should I store Kesimpta?
Store Kesimpta in a refrigerator between 36°F to 46°F (2°C to 8°C).
Keep Kesimpta in the original carton until ready for use to protect from light.
Do not freeze.
Do not shake.
Keep Kesimpta and all medicines out of the reach of children.
General information about the safe and effective use of Kesimpta.
Medicines are sometimes prescribed for purposes other than those listed in a Medication Guide. Do not use this medicine for a condition for which it was not prescribed. Do not give it to other people, even if they have the same symptoms that you have. It may harm them.You can ask your pharmacist or healthcare provider for information that is written for health professionals.
What are the ingredients in Kesimpta?
Active ingredient: ofatumumab
Inactive ingredients: Sensoready pen and prefilled syringe: arginine, disodium edetate, polysorbate 80, sodium acetate trihydrate, sodium chloride, and Water for Injection. Hydrochloric acid may be added.
