Levocetirizine Hydrochloride & Montelukast

Updated
NIKHIL KHEDKAR Says:

I have allergic problem due to dust,paint spray,deo spray and some unusual atmosphere change. due to this allergic, i am suffer with cold & cough most of the time. I am using Levocetirizine Hydrochloride & Montelukast tablets since last one week, it is really affecting on me, Now i am feeling better.

But I am really don't know what are the Major side effects of this tablets..
kindly advise.