what happens when you use nasal spray?
I use an over-the-counter nasal spray for congestion associated with allergies. What you may be referring to is a rebound effect that can occur if you use over-the-counter nasal decongestant sprays regularly. After a few days of using this type of nasal spray, your nose may become less responsive to the effects of the medication. As a result, you may need to use more and more of the medication to control congestion.