http://www.medications.com/effect/view/31769 My son, now 10...has been on singular off and on, since I don't' know how long...today was the second time he was intentionally hurting his cat. He has told me time and time again about visions while he was awake, violent ones, he argues with anyone and eve Wed, 25 Jun 2008 19:20:47 -0400 http://www.medications.com/effect/view/31769?item=9521 I am so sorry to hear about your son. I wrote about my 11 year old son, who seemed to be fueled by anger while on this medcine. After he started on the singulair again in March for allergies, he became so aggressive. The psychologist said maybe it was t http://www.medications.com/effect/view/31769?item=9521 Wed, 25 Jun 2008 20:13:01 -0400 http://www.medications.com/effect/view/31769?item=9522 The crazy sleep patterns are the worst,and although things got better off the singulair for my son,we had to work on the sleep problems,it seems to disrupt there internal clock,and it also seems to give them unrestful sleep,off singulair you can see peacef http://www.medications.com/effect/view/31769?item=9522