Hi, I Would Like To Find Out If There Is

Hi, I would like to find out if there is any medication that can be used in a nebulizer to prevent or assist with hay fever for a toddler (my son is 20 months old). I suffer from sever seasonal hay fever my self and already got my injection for this season. However, it seems my son is now also suffering from hay fever and all the mucus has now gone to his chest and he developed a sever cough, wheezing and his voice sounds very husky. I don't want to give him Allergix every day all the time. Please help.