Otrivin Nasal Drops 0.05%, which includes 0.5 mg of Xylometazoline hydrochloride per milliliter, is used to treat colds. 0.0125 mg of xylometazoline hydrochloride are delivered in each drop. It is intended for use in the nostrils, where it decongests the mucosa of the throat and nose by having a vasoconstricting effect.