I've heard from many people that if you're legitimately on the drug the experience is totally different than if you're taking it without a brain chemistry that needs it i.e. as a study drug. I wonder if that means that people who have ADHD could possibly have different or fewer side-effects than people without, if the two groups respond so differently. Are there any large scale studies about the long term health implications of using Adderall or Vivance without having ADHD?

Fighter pilots are given modafinil for alertness. Granted its probably a different type of work.