Ive been using it on and off for a few years
Artvigil armodafinil
Ive got sleep apnea and work pretty crazy hours at times
Ive never noticed any withdrawl from it, but i do use bupropion, i usually only use 1 quarter pill to maybe a half on a big day occasionally ill go 3 quarters to a full pill but its quarter at a time throughout the day
Imo less is more with this stuff, a cup of coffee lights you back up as it wears off but i dont want to feel all fucked outi just use them for productivity at work