Phenylephrine
"Over the last few weeks, I've been struggling with nasal congestion on and off with the rapid changes of weather we have been experiencing in Texas. I figured that by drinking plenty of non-caffeinated fluids (i.e. mostly water, herbal teas, etc), my condition would go away on its own. I do not believe in using medicines to solve small problems like headaches and colds, but with only hours to spare before a presentation at work I gave in and tried Sinex. 

I have never had such a quick turn-around from not being able to breathe through my nose at all to having near perfect breathing in a matter of seconds. My family has stood by Vicks products for years and I most certainly can and will recommend Sinex Spray as a solution to nasal congestion."