It is kind of like the effect that narcotics have on severe pain. Someone who wants to take morphine sulfate for a high will get that high and a great euphoric effect. Someone with severe burns or broken bones, etc., can get 20mg of morphine and all it does is dull their pain, with no real "high". Same way with ADD folks. My son has been on Adderal XR for about 4 years and functions fine at school with it. He could not focus without it. It does dull his personality down just a little. He seems to be more "creative" when he is NOT on it. He comes off of it all summer, and he says that he has no withdrawal, so to speak.
He really struggled in school before he started on it.
Bob
That's fairly accurate.
Most people can actually be classified ADD in some manner or another, but whether its clinical, low [specific] Neurotransmitter levels, is a whole different subject.
Most college students can benefit from ADD stimulant medications, but even then, sometimes caffeine doesn't do anything for some people, or has a nasty effect instead of the stimulant properties. But stimulants will bring energy and focus to just about anyone, simply based on the way the stimulants interact with specific Neurotransmitters.
For the clinical ADD/ADHD, specific stimulants have an odd reaction. Those who can clinically be diagnosed as having ADD/ADHD often have an imbalance of Neurotransmitters, and for this disorder, specific drugs in the stimulant class of chemicals can jump in and help right the brain's NT imbalance. Norepinephrine (noradrenaline), dopamine, and serotonin levels, specifically, iirc, are the NTs thought to be responsible for ADD/ADHD when they are imbalanced together.
Why ADHD kids have intense energy and a stimulant can bring them down to "normal", hell if I know. ADD, on the other hand, is a little bit different of an animal, because often when the brain is wired one odd way, those wires cause imbalances elsewhere. People with clinical ADD have a moderate-to-high chance of having clinical depression too (and everything isn't Yes or No, varying degrees of all symptoms from random NT imbalances). A stimulant for those people, I don't quite know why something like amphetamine turns their volume knob down a bit, but it does help bring their attention and focusing-ability into baseline levels, and for those individuals that is like a much-welcomed boost in attention span.
For us mildly-normal folks, that normal level doesn't work for us, because we've had it for so long. So intense periods of insane focus due to stimulants, is awesome.
I'm starting to think I don't have clinical ADD, because yep, amphetamine just doesn't "change" me, I just get mildly euphoric (very mild) and have an itch to do SOMETHING, with a great ability to concentrate on whatever I'm doing. Sadly, the procrastination bug sticks around, so I'll use that "itch" to do whatever I can possibly do that ISN'T what I need to do.

And then I focus so damn sharply on whatever I'm doing, time ticks away. But eventually I usually get to the point of "damn, I'm on this drug, I need to do what I said I was going to do". If it's a paper, I typically don't have much of an issue getting around to it, but rarely does a paper cause me much issue without Adderall. It's the reading a lot of pages to study/review, or doing something else to review for a test, that I just keep pushing away. When I get around to it, Adderall keeps me locked in once doing it, but I still battle the procrastination bug no matter what I throw into my body.
I've basically concluded I don't have ADD but rather have an inability to care/desire to do what I want/lacking self discipline. I hate myself for it because I've yet to win out, sometimes I get good times where getting things done just happens and feels natural, and other times where I have fight myself every minute, and eventually I fall off the horse and nef or aimlessly run around the internets.
And I'm glad I can't get a prescription for Adderall because I wouldn't want it to around me. I take enough shit to try and keep myself going throughout the day, I don't want a prescribed and controlled substance daily just to get things done. I like it for the cram session where I need to pull an all nighter (and for all-nighters, it's perfect because it just feels like I am awake in the day, no real extra stimulant effects), or an extra leg to tackle a huge task/project in a day... but haven't had any of those in awhile (maybe I'm not stressing enough lately), and haven't needed to find anything.