Epinephrine
Croup is a disease that mostly happens in children, and is caused by a virus. It can cause swelling in the throat, which can make it hard to breathe. Epinephrine can help bring this swelling down, which makes it easier for the child to breathe. Epinephrine works best for croup if it is breathed in, so it is made into a special mist that can be inhaled.