rhinitis me·dic·a·men·to·sa -mə-.dik-ə-men-'tō-sə n an increase in the severity or duration of rhinitis that results from prolonged use of decongestant nasal spray
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rhinitis that is nonallergic and noninfectious and is caused by rebound vasodilation after prolonged or excessive use of vasoconstricting nasal sprays or drops.Medical dictionary. 2011.