Fenofex 180 mg is an antihistamine containing fexofenadine hydrochloride. It is used to treat symptoms of seasonal allergic rhinitis (such as sneezing, runny nose, and itchy/watery eyes) and chronic idiopathic urticaria (hives). Fexofenadine works by blocking the action of histamine, a substance in the body that causes allergic reactions. It is a second-generation antihistamine, meaning it has minimal sedative effects, making it less likely to cause drowsiness compared to first-generation antihistamines. Fenofex 180 mg is typically taken once daily and provides relief from allergy symptoms without significantly affecting daily activities.