What side effects may I notice from receiving AYVAKIT?

Side effects that you should report to your doctor or health care professional as soon as possible:

-allergic reactions (skin rash; itching or hives; swelling of the face, lips, or tongue)
-changes in emotions or moods
-hallucinations
-stroke (changes in vision; confusion; trouble speaking or understanding; severe headaches; sudden numbness or weakness of the face, arm or leg; trouble walking; dizziness; loss of balance or coordination
-unusual bruising or bleeding
-vomiting
Side effects that usually do not require medical attention (report these to your doctor or health care professional if they continue or are bothersome):

-constipation
-diarrhea
-lack of or loss of appetite
-nausea
-stomach pain
-swelling of the ankles, feet, hands
-tiredness

This list may not describe all possible side effects for AYVAKIT. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.