I think the article may be focusing more upon the intention behind taking the drug, rather than the drug's actual function. If we were to extend the definition

I think the article may be focusing more upon the intention behind taking the drug, rather than the drug's actual function. If we were to extend the definition as functionally "neuroenhancing," you may end up with a rather wonky list; Take for instance 2,4-Dinitrophenol. Source:http://onlinelibrary.wiley.com/doi/10.1080/15216540600702198/abstract;jsessionid=48AA99076FE8C76A12359421A8042B00.f02t01 http://onlinelibrary.wiley.com/doi/10.1080/15216540600702198...