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Related to nasal decongestant: phenylephrine
a drug that provides temporary relief of nasal symptoms in acute and chronic rhinitis and sinusitis. Most are over-the-counter products compounded with a small amount of vasoconstrictor, such as pseudoepHEDrine or phenylephrine. An antihistamine may enhance the value of a nasal decongestant in allergic rhinitis, and a corticosteroid may reduce inflammation. Prolonged use or dosage greater than recommended on the package may cause rebound vasodilation and severe congestion (rhinitis medicamentosa).