Fexon is used to treat allergic rhinitis, runny nose, itchy nose, red eyes, sore throat, urticaria, also known as allergic rhinitis, a common manifestation of allergy that can cause skin rash and itching due to a reaction to allergens.
Fexon is one of the medications used to reduce the effects of the natural chemical histamine in the body, which is an antihistamine. Hay fever is a common sign of allergy.