Unblocks your nose fastlasts up to 10 hoursnon drowsymetered spraysudafed is a registered trade markxylometazoline hydrochloridehow does this product helpsudafed blocked nose spray with xylometazoline hydrochloride works in minutes to help clear blocked noses and relieve sinus pressure caused by colds and hayfever the metered spray gives an exact dose that lasts for up to 10 hours