Get emergency medical help if you have signs of an allergic reaction to Fasenra: hives, rash; difficult breathing, feeling light-headed; swelling of your face, lips, tongue, or throat.
Call your doctor at once if you have:
new or worsening asthma symptoms.
Common Fasenra side effects may include:
sore throat; or
headache.
This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.
 Fasenra side effects (more detail)
