Fenadex 120mg is a medication that contains Fexofenadine Hydrochloride as its active ingredient. Fexofenadine is an antihistamine used to treat symptoms associated with allergic conditions. Fenadex (Fexofenadine) is commonly used to relieve allergy symptoms such as:Sneezing,Runny or itchy nose, Itchy or watery eyes (due to allergic rhinitis), Urticaria (hives), or itchy skin rash.