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Understanding Side Effects

KYMRIAH

What side effects may I experience with KYMRIAH?

There are side effects you may experience with KYMRIAH™ (tisagenlecleucel) therapy. Your treatment team knows what to expect and is prepared to help manage these side effects.

 

KYMRIAH may cause side effects that are severe or life-threatening. Call your health care provider or get emergency help right away if you get any of the following:

  • difficulty breathing
  • fever (100.4°F/38°C or higher)
  • chills/shaking chills
  • confusion
  • severe nausea, vomiting, diarrhea
  • severe muscle or joint pain
  • very low blood pressure
  • dizziness/lightheadedness

 

Cytokine release syndrome (CRS) is a common and expected side effect that happens when the immune system is highly activated, as with KYMRIAH therapy. It can range from mild symptoms like fever and muscle pains, to severe symptoms like low blood pressure and breathing trouble.

 

Your treatment team is prepared to manage CRS. Mild-to-moderate CRS may require hospitalization, antibiotics, and pain medications. Severe CRS may require medication, a stay in the intensive care unit (ICU), or breathing support.

 

Neurological Events
KYMRIAH may also have effects on the brain. You may feel very confused, unaware, or agitated. More severe symptoms might affect your speech or cause hallucinations or seizures. In most cases, symptoms occur within 8 weeks of receiving KYMRIAH and resolve within 12 days. They may go away on their own, but be sure to tell your doctor right away if you experience any neurological signs or symptoms.

 

Prolonged Low Blood Cell Counts (Cytopenia)
KYMRIAH may cause a condition called cytopenia. This is when you have low levels of one or more types of blood cells. Your treatment team will do blood tests to check all of your blood cell counts after treatment with KYMRIAH. Cytopenia that lasts a long time (prolonged) may increase your risk of infection. Cytopenia will be monitored and your treatment team is prepared to manage it. Tell your doctor right away if you get a fever, are feeling tired, or have bruising or bleeding.

 

Low Antibody Levels (Hypogammaglobulinemia)
Because KYMRIAH CAR-T cells are designed to detect and destroy your B cells, they will also attack the normal B cells in your body. B cells defend your body by producing antibodies. Antibodies bind to invaders so other immune cells can destroy them.

 

After KYMRIAH, you may have fewer normal B cells and, therefore, fewer antibodies. A low level of antibodies in your blood is a condition called hypogammaglobulinemia (hy-po-gam-muh-glob-u-lin-EEM-EE-uh). If untreated, a low antibody level may increase your risk for infections. Your treatment team can manage this with antibody replacement medications (for example, IVIG infusions). Tell your doctor right away if you develop signs or symptoms of an infection.

Common side effects

The most common side effects of KYMRIAH are:

  • difficulty breathing
  • fever (100.4°F/38°C or higher)
  • chills/shaking chills
  • confusion
  • severe nausea, vomiting, diarrhea
  • severe muscle or joint pain
  • very low blood pressure
  • dizziness/lightheadedness

 

These are not all the possible side effects of KYMRIAH treatment. Talk to your treatment team about other possible side effects and medical advice about side effects. You are encouraged to report negative side effects of prescription drugs to the FDA. Visit www.fda.gov/medwatch, or call 1-800-FDA-1088.

How will I feel after KYMRIAH?

After you get your new KYMRIAH cells, you may feel bad in different ways including feeling sick, tired, or very warm. Sometimes these feelings will go away on their own, but your doctor is here to help you if they don't.