Hi JP. Thanks for the response. My autistic son actually has had alot of bowel problems in the past. We have been able to keep it under control with a very strict diet. We haven't noticed any increase in bowel trouble (or any other unwanted side effects), but that is very interesting, I will keep watch.

The reason I was so interested in the Aricept is because of what acetycholine does in the brain. Both of my boys have problems with excecutive function. I have been hearing alot about Provigil. I know it helps with fatigue and sleepiness. I will have to research it and see how it helps with adhd.