From my experience with croup and my boys...don't use ANYTHING!
Do what you would normally for a cold. When the croup is active, steam in the bathroom and/or go out in the cool air. (if it's not cool or is too cold where you are, standing in front of the freezer and breathing works wonders, too.
Croup is a virus in the throat. In adults, it's laryngitis. It causes the windpipe to inflame, it's not congestion. (which is why vicks won't do anything) Don't do anything to put irritants into the air as that could cause more irritation in the throat and make it harder for them. (learned that one from experience!) Don't give any cold medicines or anything designed to "dry them up"...it WILL make it worse and you WILL end up in the ER! (yeah...experienced that one, too)
Croup is at the worst for the first three days. After that it's usually just dealing with the normal cold symptoms.
at 11:45 AM on May. 13, 2009