What are the basics of how a nasal decongestant spray works?
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I’ll add for clarity’s sake, some nasal “anti-allergy” sprays work using a hormone that changes the nature of the sinus cavity, which takes time and diligent applications. Not sure where you live, or what the brand names by you are, but things like “Flonase” (Medically “Fluticason”) take weeks to have an effect, don’t grab those for a quick relief hit.
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