Told my doc that I was taking it instead of Provigil (the brand name for modafinil) and they're all for it, as long as I get my liver enzymes checked on a regular basis.
Technically, I was prescribed Provigil to deal with very bad sleep apnea, but it's also to take care of my mild ADHD. Sleep apnea / shift work disorder are the only "on label" ways that insurance will pay for it.
I tried adderall a few years ago, and it was great for ADHD / productivity / made me much more outgoing (according to my girlfriend at the time), but I'm one of the few people that has the side effect of massive uncontrollable sweating. I could be sitting in a 75F degree office and just dripping. Had to stop taking it after two weeks. The changes in prescription laws (must have a new prescription every time, no refills, and then supply issues for a while) are almost too much trouble to be worth it, anyway.
In the US?