What are the basics of how a nasal decongestant spray works?
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It constricts the blood vessels which constricts the nasal passages and also reduces nasal swelling by not allowing as many pro inflammatory cells to “leak out” of the blood vessels. It’s also why they should only be used short term (a couple days) because your blood vessels will end up getting used to the decongestant and will then always swell up without it.
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