Fexon is used to treat allergic rhinitis, also known as runny nose caused by allergies. Its symptoms include runny nose, itchy nose, red eyes, and sore throat. It is also called urticaria, which is a common manifestation of allergies and can lead to a rash and itching resulting from a reaction to allergens.
Fexon is one of the treatments used to reduce the effects of the natural chemical histamine in the body, as it works as an antihistamine. It should be noted that hay fever is one of the common symptoms of allergies.