The uses of BUDENASE AQ ( Rhinocort, Generic Budesonide ) include: This medication is used to treat nasal symptoms (sneezing, itching, runny/stuffy nose) caused by allergies. Budesonide belongs to a class of drugs known as corticosteroids. It works by reducing swelling (inflammation) in the nasal passages. How to use Budesonide Nasl Read the Patient Information Leaflet provided by your pharmacist before you start using budesonide and each time you get a refill. If you have any questions, consult your doctor or pharmacist.