question: Hi, dr My son is 6 yeras ,he suffering to HRDA ashama , he gives a dighirler fb 200 2 pump in a day & montair lc kid 5ml 1 time& deriphyllin 5 ml 2 time but sunddenly he coughing n cold ,he cant breath normally some time i give him ashthalin nubilizer 2/3time .after 3 ya 4 day he felling good .please dr help me & suggest me what i do for him permantly solution