adhd
"I'm an adult who has taken this off and on for 4 years.  I've always had trouble concentrating and Focalin is an effective fix.  

I do think there are minor side-effects though.  It makes me feel much more focused and less worried/panicked about what I need to do.  Unlike other though I would not say it calms me down I feel like it actually stresses me out more.  When I take this I'm more serious and easily annoyed and I can't relax.  I have also found that my appetite drops off and that I don't sleep very deeply.

Overall a great medicine but for me and many ADHD people our symptoms are brought out due to simply a lack of strenuous physical exercise (1hr) every day.  When on a regular exercise and sleep schedule I do not need it."