adhd
"When I first took Concerta, I was more able to concentrate on hard tasks, such as writing and doing math calculations. When I stopped taking this medication, I was unable to pay attention in class, and kept misplacing flash drives and pencils. Plus, I've got a bunch of D's and F's on essay assignments because I've been leaving ADD untreated for six months. 

Concerta helped me concentrate, but it didn't make me too jittery or not focused enough, and it feels just right. When I came back to the medication, after six months of not taking it, I've had the best school days I've ever had in my life. This medication works, no nonsense, just don't drink too much coffee or energy drinks if you don't want a fast or irregular heartbeat."