Too much may cause serious side effects. Use dexamethasone nasal on a regular basis for best results. It may take several weeks to get the maximum effect of this medication. Dexamethasone is a steroid. It prevents the release of substances in the body that cause inflammation.
Dexamethasone nasal is used to treat the nasal symptoms of allergies and other seasonal reactions.
Dexamethasone nasal is also used to treat some types of nasal polyps. Dexamethasone nasal may also be used for purposes other than those listed in this medication guide. Before taking this medication, tell your doctor if you have a viral, bacterial, or fungal infection of any kind. The absorption of this drug into your system can inhibit your body's ability to fight off infections. You may not be able to use dexamethasone nasal if you have an infection.