I have been asthmatic for 25+years and was advised at my last asthma review a year ago to use Fostair and told to take one Montelukast at night. However, these have gradually made my asthma worse so until I see my doctor in the morning I have not taken either of these medications for 5 days. Although I have been short of breath since stopping, I can clear my trachea of mucus a lot easier and once I do this I can breath normally. Before I had a dry irritating cough that I had not had before and I can only put it down to either the Fostair, Montelukast or both. I will write again to let everyone know how my doctor's visit went. I am going to ask to be put back on my brown inhaler (the name I have forgotten!) as I faired better on it and I will be letting the doctor know that I won't be taking the Montelukast tablets either. Too many side effects in my opinion of both of these medications and none of which I would recommend. Of course this is only my opinion and base on my own experience whilst using them so please take notice of your own doctor's advice!