What side effects may I notice from receiving Fasenra?

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
-breathing problems
-signs and symptoms of low blood pressure like dizziness; feeling faint or lightheaded, falls
-signs and symptoms of infection like fever or chills; cough; sore throat

Side effects that usually do not require medical attention (report these to your doctor or health care professional if they continue or are bothersome):

-headache
-pain, redness, or irritation at the site where injected

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