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It does many things, in order to achieve the goal of nasal decongestion. It acts by enhancing norepinephrine (noradrenaline) and epinephrine (adrenaline) or adrenergic activity by stimulating the α-adrenergic receptors. This induces vasoconstriction of the blood vessels in the nose, throat, and paranasal sinuses, which results in reduced inflammation (swelling) and mucus formation in these areas.

Basically it temporarily constricts blood vessels to allow for more "breathing room" so to speak in your nose and throat.

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15y ago

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