What side effects may I notice from receiving TAZVERIK?

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

-allergic reactions like skin rash, itching or hives, swelling of the face, lips, or tongue
-bone pain
-breathing problems
-feeling faint; lightheaded, falls
-fever or chills, sore throat
-signs and symptoms of bleeding such as bloody or black, tarry stools; red or dark brown urine; spitting up blood or brown material that looks like coffee grounds; red spots on the skin; unusual bruising or bleeding from the eyes, gums, or nose
-unusually weak or tired
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
-decreased appetite
-muscle pain
-nausea, vomiting
-stomach pain
-tiredness

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