What ever your saying fits into Astham or bronchitis. And it is a longterm issue to deal with. It is cause of diferent reasons so can't be cures in short periods. What ever medication your using is correct but you should know when and how long to use them.if you use them properly it will help yout child to improve is lung capacity and sumptoms will come down. You need a regular follow up at peciatrician even though the symptoms are not heavy, don't self medicate the child, it can hamper doctors diagnosi and intervention. Avoid cold foods and keep a monitor on his good which are aggrevating his symptoms and try to avoid them.