Concerta, 18mg-72mg officially and up to ~200mg unofficially.
Initial Thoughts: just curiosity, open to whatever happens.
The Experience: heart rate increasing and palms sweating a bit more on higher dosages. Otherwise nothing.
The Balance: most definitely not worth it. The main issue was the cost of it and absolutely no beneficial effects. Did put me off of trying other ones as well as those would have needed extra paperwork every time.