I'm 17 years old, I've been taking Singulair for about 3 or 4 years now. I didn't take it all the time, just when my allergies and asthma would kick in. And I can honestly say every time I've taken it I've had mood swings out of no where, I've felt depressed, anxious, had nightmares every night I took it (I usually took it every night with the rest of my medications). It is extremely Ironic that just the day before I heard about the report of linking it to suicide, I was just telling my mother how depressed I was and how I couldn't sit still, felt anxious, wanted to rip my skin off, and I couldn't get sleep. I went to the doctor yesterday, and she told me to discontinue it and to throw the rest of it away.