question: My son, who has exercise induced asthma, has had a significant chronic dry cough for several weeks. I have taken him in and he was put on prendazone. It did not do any good. He has an inhaler which does not do any good. We are a very smoke free environment. I have bought him a new pillow reduce allergens as much as possible. We are very health conscious... He is having a hard time sleeping and is disruptive in school...