Modafinil is a hot topic these days
I use it because I am not naturally suited for the work. I have a genetic variation(gs224) that makes me tired all of the time and stimulation-deprived. However in our current economy, it seems like the only career path I can take that will work with my abrasive, likely autistic personality while still providing long-term career growth opportunities.
[1] https://en.wikipedia.org/wiki/Substituted_phenethylamine
for some it provides clarity, for others, fog. the dopamine transporters are very mysterious to me.