my son is 6 years old, he had a dry cough for almost 20 days and after that he developed new problem, i.e. during night in deep sleep he has been having cough once and during that period he is having problem in taking breadth, so doctor prescribed levolin, codylex, montaire and budecort 200 mcg rotacap. After using these medicines for about 20 days he is still not completely ok, so what should I do?