IMO stimulant drugs like amphetamine salt combo, detxtroamphetamine, methylphenidate racemic, and dextromethylphenidate all really aren't performance enhancers. They don't make people smarter, they don't necessarily make people work faster, they don't reduce the amount of mistakes say on a test or quiz, etc. It can help individuals find motivation, reduce the movements and tics, stop people from falling asleep, and maybe a few other things. It drives me mad seeing people on amps who think they are 100x as smart while on them, think it is some sort of miracle drug, or even use them to stay up over night to get shit done (not that when you have to turn a paper in the next day, the ability to stay awake isnt useful). When you stay awake using amphetamines, the number of mistakes on whatever assignment you are working on will be like 10x the amount of sober , organization can some times become messier, the material you are trying to retain doesn't, etc. Its better to work sober ahead of time. Cognitive behavioral therapy, extra time, different testing environment, extra help with individuals who can find better ways for you to study/organize, etc., are all a hell of a lot more productive. Now I'm not saying people don't get some advantage with using them, but honestly I see most ADHD individuals and non-ADHD individuals have no improvement from their use. Adding alpha 2 adren agonists like clonidine or guanfacine might actually make stimulants more useful as they cut a lot of the side-effects out of the picture aswell as improve certain functions that amphetamines likely hurt. For example Guanfacine has been seen to help improve working memory, reduce distractibility, helps control impulses (can help with behavioral issues, or potentially in this those heading towards substance abuse, reduce the likely hood), etc.
young kids and young teenagers IMO certainly shouldn't be put on stimulant drugs besides in rare cases. Other methods should be employeed. parents need to become trained in how to deal with their child, as their responses to the childs actions can make their problems worse. Children with ADHD are struggling in their own mind, don't understand why they are different than others, why they get in trouble for bad grades or being disruptive when its not because they are being deviant (most of the time), etc. The fact that teachers and parent punish the kids, or talk to them in such ways that emotionally destroy a child with ADHD, just makes shit worse. You can not treat a child who might have or grow into having ADHD like everyone else, they need to be talked to in certain ways, they need to have different approaches to learning than most other students, etc. If teachers and parents could try and use other methods than drugs to help the child, they may not grow into having ADHD as an adult, which then is a life long struggle.
The only stimulant I really like for ADHD is methamphetamine. The therapuetic benefits for ADHD start at doses a lot lower than some of the side-effects/recreational effects, compared to amphetamine. Even just 5mg of methamphetamine once in a day ime is better than any dose of amphetamine.