Rhinitis medicamentosa

Rhinitis medicamentosa (or RM, also known as rebound congestion) is a condition of reboundnasal congestion suspected to be brought on by extended use of topical decongestants (e.g., oxymetazoline, phenylephrine, xylometazoline, and naphazolinenasal sprays) and certain oral medications (e.g., sympathomimetic amines and various 2-imidazolines) that constrict blood vessels in the lining of the nose, although evidence has been contradictory.