My 12 yr. old son has been on singulair for about 5 years. He ha...

My 12 yr. old son has been on singulair for about 5 years. He has always been a sensitive child but there have been times when music or even going to church would make him cry. My Mom passed 5 yrs ago as well and we connected his sadness with her passing. Now I'm not so sure. He does sleep walk from time to time and states he has trouble getting to sleep. He is taking singulair for allergies not asthma. I'm stopping him tonight. He is heading into puberty and I have to say I'm frightened about the suicidal thoughts. I wonder if it could be similar to the anti depressants that effect teens in the same way.