Now that sounds like something you don't want to put in your system unlessyoi actually need it.
anything else is playing with fire, given that amphetamine (barring methamphetamine and heroin) is the most addictive substance known to man.
For peole who need it, when used a directed, it allows them to concentrate as a normal person would (ADHD).
Take it as "rocket fuel for the mind" and sooner, rather than later, you won't be able to do anything without your artificial "fuel"
Even well educated and informed professionals with a college degree and functional family and work environments will find themselves making up excuses and false pretenses of being able to control amphetamine addiction, just after finishing "this last project", "just this last sprint/cram/night"
My advice: if not prescribed by a qualified psychiatrist; dont even consider it. Get it out of your way, and stay out of its way.
Unless you see a 12 step program and rebuilding a life from scratch in your near future a something appealing and totally worth it.