I think Singulair is a great medication. I had a chronic cough for many years and Singulair is the ONLY medication I have found that has given me relief. I take it daily and year round. When I stop taking the medication for even a few days I always suffer again from my cough and usually get some form of a sinus infection. I also work in the medical field and recommend and prescribe Singulair to my patients all the time - I have had no complaints about SEs from my patients and most report that it reduces their asthma and/or allergy sxs.