Singulair Explosive Reactions, Googled, Bodily Harm, 5 Months, Adhd

My 7-1/2-year-old son was on Singulair for 5 months for asthma and possible allergies. He had been on medication for ADHD for almost a year at that point and had been doing well with it. Singulair made him into a monster. He could not be reasoned with and was constantly overreacting to everything. Just asking him to put on his shoes caused explosive reactions, even to the point of threatening us (his parents) with bodily harm if he did not get his way. We unexpectedly stayed the night out of town and did not give him his Singulair for a few days and started noticing that he was much more rational, calm, and more like his old self. I had heard of the depression risk with Singulair and googled about it this morning and was floored by the amount of children with these type reactions. It is now listed as an allergy for my son and I will never give it to him again.