[jack_pp]

have you tried modafinil? might not be the best solution for long drives except if you plan well ahead, like say if you have a late 4h drive after which you will sleep maybe take modafinil 6-7h before the drive so you can actually sleep when it's over

[lostlogin]

Modafinil might make you smarter too.

https://pubmed.ncbi.nlm.nih.gov/16140369/

[jack_pp]

personally I've tried to use it for work and it's hit or miss, if I have some frustrating bugs I'll be more irritable on modafinil or caffeine because while on them I want to achieve things fast and I'll be more easily irritated if I'm blocked by long running tests or other long periods where it's not clear how to proceed.