My son is continuing coughing past 20 days, I had visited doctor and he suggested mahacef100, montek lc and chericofls in our first visit but it didn't work, he suggested pft test which had been done and reports is moderate, in 2 d visit he suggested nebulizer with levolin. 0.63 mg and budecort 0.50 mg for 7 days and in night montek lc once in a day night time. But my kid situation is worse he is coughing like bark. My kid is 7 years old. Pls suggest what should I do.