Why is it cheap? Low tax? Is is manufactured in india?
Because unlike the US, India's med scene is not controlled and held hostage by Big Pharm companies.
Along with the other reasons stated here.
But using it for a pre workout is not the best choice, It lasts long after the work out is over. Now if you work out first thing in the morning and need something to carry you through the rest of the day, it is ideal.
For whoever asked about other ADHD meds, Modafinil is milder than adderall, ritalin, and vyvnase. (those three are nothing but watered down meth in my opinion). You don't get the jitters and other nasty sides from it.