How To Treat Allergic Bronchitis Inspite Of Giving Budesal?

Hi...my son has allergic bronchitis since past one year. I have been giving him Romilast B5 since past 9 months. He has been falling sick off n on. Now since past 2 weeks he is again unwell. The doc suggested him Levolin puff thrice daily....it didnot work...then he prescribed Budesal .5 thru nebuliser. He was much relieved but the day his course got over he again developed cough with fever. Levolin puff again is not working. I don t know what should I do. the doc is out of station and will be back only next week.