I would HIGLY reccommend you find an alternative to Singulair. See my other posts under matthewct1. Mood swings are a sure sign of Singulair side effects. 11 year old should not cry at the strangest things. Use your instincts. If you allergist isn't aware of these side effects you should find a new one.
I agree with the last post!! Get him off Singulair!
i have read posts of a feeling of a big mucos ball in the throat,at first my son had an adversion to food,then it went to over eating never feeling full,as far as the crazy moods....it is the singulair not his age...you know him best...your doctor struggles to even know his name...if it is not normal behavior for your child then it just may be the singulair...it only takes a day or two to figure out...you see a sweet sweet twinkle in there eyes that you didnt even realize was missing...but when you see it you recognise it right away...good good luck keep us updated we care
mood swings strangest things allergist upper gi 11 years 3 years medicine solid foods singulair side effects singulair instincts moods twinkle good luck