nootropics

Modafinil is a class above caffeine.

→ Less addictive
→ More powerful and longer-lasting
→ Little to no impact on falling asleep (if taken early in the morning)
→ Alleviates sleep deprivation

I don't understand why it requires a prescription while caffeine is available OTC.

Co-Founder at sablier.com, and open-source developer. I have a broad range of interests, including longevity, epistemology, physics, and psychology.

I tried it once but my face started twitching. 

Also noticed (side benefit) it really suppresses appetite.