Effect of Montair. To solve this?

Hello Doctor, we relocated from USA to india this January. My son was born in USA and used to get mild wheezing only with cold and congestion ( not every time). After moving here he had couple of cold episodes. So our pediatrician put him on montair 5 ml daily for 6 months. Now with this season he is catching cold very often .. one week full of cold and be better for next week and catch one more cold week after. And every time it start with sneezing for two days then sudden fever of 101 or so.. with medication fever will be controlled then starts cold and cough for 4 - 5 days ... same sequence repeating for 4 times in a row. Is montair making him prone to infections? Couple Mother's forum also mentioned that their kids got more viral infections with montair. Can we stop montair ? Is there any alternative to solve this ? Please advise. Thank you.