I have done some experiments with nootropics (namely adderal) as well, but failed to notice anything. I am a chain smoker, that could be the reason, I am not su

I have done some experiments with nootropics (namely adderal) as well, but failed to notice anything. I am a chain smoker, that could be the reason, I am not sure. I failed to understand the basics behind this "cognitive enhancer" hype, lets say these stuff "really" works, then why we don't see those multi-billion pharmaceutical companies investing on them? If they would really worked, then I should already find all those pharmacy shops around me teeming with nootropics (assuming they have negligible side effects), right? BTW, I am actually from south-east asia, here you can buy almost anything (except LSD etc.) without prescription, and we have dozens of pharmaceutical companies outsourcing drugs to the other side of the world. Moreover, if these companies could really come up with something real, then it could be an "instant hit" here.