Fexofenadine is an oral tablet used for the management of allergies and hay fever. It has been used effectively to provide relief from sneezing, a runny nose, itchy eyes and skin irritation. Fexofenadine first became available under the brand name Telfast, getting the name from its ability to provide relief as soon as one hour after a dose, with effects lasting for 24 hours. Fexofenadine has the great benefit of being non-sedating, meaning its less likely to make you drowsy and affect your day to day life.