Nasal congestion, the blockage of nasal passages due to swollen membranes
Topical decongestants should only be used by patients for a maximum of 3 days in a row, because rebound congestion may occur in the form of rhinitis medicamentosa.
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Rhinitis medicamentosa (or RM) is a condition of rebound nasal congestion brought on by extended use of topical decongestants (e.g., oxymetazoline, phenylephrine, xylometazoline, and naphazoline nasal sprays) that work by constricting blood vessels in the lining of the nose.
Each 5 mL of Benadryl Chesty Cough & Nasal Congestion contains 100 mg of Guaifenesin (an expectorant) and 30 mg of pseudoephedrine hydrochloride as the active ingredients.