What side effects can this medication cause?

Azelastine may cause side effects. Tell your doctor if any of these symptoms are severe or do not go away:

• eye burning or stinging
• headaches
• bitter taste
• eye pain
• blurred vision
• excessive tiredness
• sore throat

Some side effects can be serious. The following symptom is uncommon, but if you experience it, call your doctor immediately:

• difficulty breathing

Azelastine may cause other side effects. Call your doctor if you have any unusual problems while using this medication.

If you experience a serious side effect, you or your doctor may send a report to the Food and Drug Administration's (FDA) MedWatch Adverse Event Reporting program online at http://www.fda.gov/MedWatch/report.htm or by phone 1-800-332-1088.