Key takeaways
Flunisolide and fexofenadine (Allegra) are both used to treat allergy symptoms, but they work in different ways and are used differently. Flunisolide is a corticosteroid nasal spray that you use directly in your nose to reduce inflammation and treat symptoms like congestion and sneezing. It requires a prescription and is used regularly for the best results. On the other hand, fexofenadine is an over-the-counter antihistamine taken orally to block histamine and relieve symptoms like sneezing, runny nose, and itchy eyes. Fexofenadine starts working in about 2 hours and can be taken as needed or regularly. Flunisolide is suitable for children 6 years and older, while fexofenadine can be used by children as young as 2 years, depending on the formulation. Flunisolide may cause nasal burning and stinging, while fexofenadine can cause headaches and dry mouth.
