<< Yep, caffeine can have a relaxing effect on some people. It's a stimulant, but sometimes, as with ritallin and such, it will relax ya. >>
Yep.
If your mind is racing, you can't fall asleep.
Stimulants help you concentrate.
So, ADD folks have cronic sleep problems.
Typically, they are suffering from lack of sleep.
Then, they have a Mountain Dew or a Ritalin, and as soon as their mind stops racing..boom, they pass out.