Do you know that if you give a cocaine addict Ritalin, he won't know it isn't coke? It's because it is the same base as meth. (It is like 1 letter and 1/2 an element or such different only, sorry, I'm not a scientist.)
Yes, we know, the reason ADDers are more likely to get addicted to coke/meth instead of alcohol, and we are all addicted to adrenaline

(at least I always have been!) is because our frontal lobes have reduced blood flow and don't make as much endorphins as normal, so Ritalin in us helps get us up to normal and is not addictive, it's been the biggest blessing in my life in a long time.
Reading is fundamental.