We use EukyBear Rub...I was using it on #2 last night with croup (lol, I initially typed crap, and yes, croup is pretty crap!). It can help with breathing, I know it clears my nose, and it seemed to help last night. So that made him less distressed and more relaxed, which made it easier for him to breathe.

I tend not to use it often, mostly when they're having trouble breathing and a bit upset by that. Then we blow noses, and use Eukyrub. If nothing else, having it rubbed on their chests is a comforting contrast to being assaulted with tissues all the time.