Fexofenadine. - Telfast pills are hypoallergenic, non-drowsy pills used to relieve annoying allergy symptoms. - These tablets contain fexofenadine, an antihistamine that does not cause drowsiness, which enables you to use it during the day. - It is also characterized by its long-lasting effect that lasts for a whole day, so you can take only one dose per day when suffering from chronic allergies. - Telfast pills soothe itching and rash in addition to relieving the symptoms of cold and sneezing associated with chronic and seasonal allergies.