Get emergency medical help if you have signs of an allergic reaction: hives; difficult breathing; swelling of your face, lips, tongue, or throat.
Stop using fexofenadine and call your doctor at once if you have:
flu-like symptoms (fever, chills, unusual tiredness);
new or worsening cough;
pain; or
signs of an ear infection--fever, ear pain or full feeling, trouble hearing, drainage from the ear, fussiness in a child.
Common side effects may include:
headache;
back pain; or
cold symptoms such as stuffy nose, sinus pain, sore throat.
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.
 Fexofenadine side effects (more detail)
