my almost 10 yr old son has diagnosed ADHD. he has tried 3 different stimulant drugs at various dosages, some have worked for a little while and school have seen a big improvement in behaviour and work but then they seem to stop working as well. others have over stimulated him leaving him 'gurning' and fixated on a rubix cube for 8 hrs solid. doc is now wanting to try this but after reading side effects im really not sure! he does talk of killing himself now and then and wishes his elder sister dead almost daily. can anyone give me any advice/guidance? forgot to mention some of his meds have left him with no appetite until theyv worn off and he finds it difficult to get to sleep. hes already very slim. pls help :-(