A lot of comments here are warning about the addictive properties of stimulant medications. For folks without ADHD, you should know that stimulants, like Ritalin and Adderall, do not usually cause the same response as in non-ADHD people. I've spoken with many people on stimulants, and none of them enjoy taking the medication, beyond what it has done to improve their lives. Furthermore, most ADHD people develop tolera…
Only if you're not used to it there is this "bouncing off the fucking walls" effect. But it goes away if you know this effect already.
Than amphetamines can increase focus, and make you chill instead of hyper-active. That's why people take it to study for example actually.
After a few days of continual use only the increased focus effect stays. But it doesn't have almost any effect on one's mood any more. Actually it can even cause a significant drop in mood.
Still it's addictive. Like tee or coffee, which won't make you feel full of energy any more when your addicted, it just becomes a necessity to "function". You can show all physical symptoms of "being sky-high on speed" like pupil dilation and such, but just go to sleep for example.
I don't question that the effects of stimulants like amphetamines may help overcome some medical conditions, only that I don't think that the effects are much different in otherwise healthy individuals.