First, you need to have an Rx for that in the USA, and as far as I know, in all other reputable countries with whom we have internet purchasing. That's dangerous stuff, and if you don't have a thorough physical, you could die suddenly of a heart attack on Adderall. I'm not a goodie-2 shoes by saying this, as this is a hard drug which must not be misused. With that said, it's NOT hard to get a psychiatrist to prescribe it, as long as you pass the physical. Many adults have ADD and ADHD, and Adderall (methamphetamine salts) is a very popular drug to help those people.
So that's what I suggest; get a good doctor, and know you're on it safely and not having to fear law enforcement or worse yet; Saint Peter's call.
Charles