[gaspoweredcat]

nothing legal, however if youre willing to bend the rules a little then there are some options available:

Amphetamines (adderall/vyvanse/amfexa etc): these will easily clear the fog from lack of sleep, the downside being theyre expensive

Modafinil: this chemical was developed for narcolepsy but was soon found to be useful for cognitive enhancement, itll keep you going up to 48 hours with almost no loss of focus or ability and in some cases youll even be better. the other up side to this is that Modafinil is very cheap

[rl3]

>...itll keep you going up to 48 hours with almost no loss of focus or ability

That isn't true. Sleep deprivation will significantly impact your cognitive abilities even so, perhaps just not as much as it otherwise would.

Quality sleep on a regular basis is the foundation for anything sustainable, regardless of drugs.

[chefkoch]

>Amphetamines (adderall/vyvanse/amfexa etc): these will easily clear the fog from lack of sleep, the downside being theyre expensive

and addictive and often neurotoxic..

[afarrell]

dexamfetamine might mean you don't feel the fog, but its your Working Memory will still be shot.