The dazed reaction in the evening can be due to an incorrect dosage, or as a result of the medication having worn off. However, if the school is not noticing any improvement, it seems the former situation is more likely.
There is also the possibility that Concerta is not the ideal medication for him.
Poor self esteem is very common among children with AD/HD as they become accustomed to failure. Self esteem courses are available and it may be worthwhile sending him on one, once the medication side has been dealt with.
It is important to be gentle but firm with him during the beginning stags of medication; children of his age may well be feeling 'different' but unable to express it. Please remember the being firm part as well - the last thing you need is a child unwilling to do anything because he knows you feel sorry for him.
It is a trial process, but results should be evident soon.
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