LET'S TALK SAFETY
KESIMPTA works by impacting your immune system, so it could increase the risk of serious infections, including:
-
Hepatitis B virus (HBV) reactivation: Before starting KESIMPTA, you'll get a blood test for HBV. If you've ever had HBV infection, it may become active again during or after treatment with KESIMPTA
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Progressive multifocal leukoencephalopathy (PML): PML may happen with KESIMPTA. PML is a rare, serious brain infection caused by a virus that may get worse over days or weeks, and can result in death or severe disability
Another serious side effect is:
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Low immunoglobulins: KESIMPTA may decrease some types of antibodies. Your doctor will do blood tests to check your immunoglobulin levels
THINGS TO TELL YOUR DOCTOR
Before you take KESIMPTA, it's important to tell your doctor if you have any infections, or if you:
-
Have or think you have HBV or PML
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Have taken or plan to take medication that affects your immune system
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Had a recent vaccination or have one scheduled
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Are pregnant, think you may be, or are planning to be
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Are breastfeeding or plan to
HERE'S WHAT'S MOST COMMON

Local injection-site reactions:
Symptoms
include redness, pain,
itching, and swelling.

Injection-related reactions (systemic): Symptoms include fever, headache, muscle pain, chills, and fatigue.
-
Injection-related reactions were mostly mild to moderate (99.8%) in the clinical trials
-
The incidence of systemic injection-related reactions with KESIMPTA was highest with the first injection (14.4%), decreasing with subsequent injections (4.4% with second, less than 3% with third)
Other possible side
effects include

Upper respiratory infections: Symptoms include sore throat, runny nose, and headache.

Headache

My doctor and I discussed the possible side effects of KESIMPTA, and decided its potential benefits outweighed the potential risks.
– SARAH Q.
Sarah Q. has taken KESIMPTA and has been compensated for her time.
Sarah Q. has taken KESIMPTA and has been compensated for her time.
Learn about
KESIMPTA and COVID-19.
ABOUT COVID-19
Check out the results from the
KESIMPTA clinical trials.