I cannot believe I am seeing this. I thought my son develops ADHD...

I cannot believe I am seeing this. I thought my son develops ADHD.... My son (6) took Singulair since he was 2 1/2 (asthma). The drug worked great, until about one year ago: anxiety, severe mood swings (yes, crying at the drop of a hat), fears of being alone in a room, any room (even when I was in his view), aggression, loss of concentration. I thought it was because my husband was deployed and took my son to the psychologist. Over the last month, my son developed new symptoms: itching, and therefore, rubbing first over his face, by now from the feet up over his whole front body. We took him off Singulair two days ago and investigate other asthma meds (he still is on Flovent). Hopefully, we will see improvement soon.