I'm 22 years old. I've been on Singulair for about 5 years. I have stomach pains and mood swings frequently. As soon as I heard the news about depression and suicide I stopped taking it. I have a family history of depression and suicide so I don't need anything helping it out. I thought the mood swings were just from my hormones... guess not. I have not felt much of a change yet. I've been off the med sinceThursday.