Fexofenadine is an antihistamine, which means it works by blocking a substance called histamine that your body releases during an allergic reaction. When you come into contact with pollen, the cells in the linings of your nose and eyes release histamine, causing inflammation that leads to allergy symptoms such as itchy eyes and a runny nose.

Fexofenadine is an antihistamine that may be used to treat allergy symptoms (including hay fever) in adults and children. Fexofenadine is also used to treat skin itching and hives caused by a condition called chronic idiopathic urticaria in adults and children who are at least 6 years old.