Nasacort allergy nasal spray works to relieve allergy symptoms for up to 24 hours nasacort allergy nasal spray is thixotropic which means it stays where it is needed most in the nose nasacort allergy nasal spray has an anti inflammatory action which brings quick relief from allergy symptoms such as sneezing congested nose itchy nose and runny nose as an alternative doctors can also prescribe medication that can assist with your hayfever please visit our online doctor service to proceed