I'm commenting just to balance out everyone saying this is false. I took Ritalin in middle school and never felt high whatsoever. One day my mom took it (once) because she was curious and she said she felt high (she told me this many many years later).

I took it again after college and can say that yes if you take a high enough dose it will make you slightly euphoric but I think it's different than the high of recreational drugs. If your mood is too heightened when you take it then probably you should cut back on your dosage.