I dunno, I know a lot of people myself included say that adderall tends to poop out after a week or two, then you have to up the dosage. I'd say it's not worth it. Adderall is a pretty dangerous drug (especially if you have any family history of heart problems). Always put your health first. Adderall in high doses has been known to cause irreversible damage. Also, even if the damage caused is reversible, it will probably take longer that 4 weeks to reverse it. There are many other supplements that can help you out (and are good for you too).
Below is a quote from Scientific American (magazine):
"Cocaine and amphetamines are less benign. Although they work on the brain through different mechanisms, they have similar effects. Taking them increases the release of some of the brain’s feel-good neurotransmitters—including dopamine and serotonin—and produces a rush of euphoria. They also increase alertness and energy.
That all sounds pretty good, but cocaine and amphetamines are extremely addictive drugs and in high doses they can cause psychosis and withdrawal. The withdrawal symptoms are nasty and can lead to depression, the opposite of that euphoric feeling. And of course, an overdose can kill you."
Article Found Here: http://www.sciam.com...a...&print=true