Concerta is almost exactly the same thing as Ritalin it's just that with the time release it lasts 12 hours.
My brother is prescribed it and he hates it but he can't get Ritalin cause he lives in Japan and they don't prescribe like anything good in Japan, I mean they are WAY worse than the U.S. and won't even prescribe him Ritalin.
So he gave me some a few times when he was home and at first I didn't like it because what he would do is remove the time release things from the capsules so they'd be shorter acting and when he'd do that and I'd take it I didn't like it and it gave me jitters.
But then he gave me two of the normal ones the way they come to just take them both in the morning and I had a GREAT day on them.
Then another time I combined them with Kratom and that gave me an excellent high.
Yes, it does often give bad jitters, or at least it did when my brother tampered with it and made his own instant release ones, and he gets jitters all the time from them and complains, but IMO now I see its true potential and it can be good stuff sometimes if you react properly to it.
He says that some days he'll take it and it will do nothing at all and others he'll feel ok from it and that for some reason he thinks it's a weird temperamental drug that has a mind of its own.
There are drugs like that, like kind of Kratom in a way will behave weird, even though it is quite possibly my favorite drug, sometimes even the same doses of the same strains will behave differently and it can at times be unpredictable, but it's ten times better than Concerta.
Anyways, IMO Ritalin is probably better, but yes Dexadrine and Adderall (close to the same thing) are WAY better than either. I'm trying to see if I can convince my psych. to prescribe Adderall right now, or at least I will when i see him soon (he's the only psych. I've ever met covered in tattoos everywhere but his face and used to be a hippie and is pretty cool so I think I have a shot HAHAHA).
But yeah, Concerta is the same thing as Ritalin more or less, comes with lots of jitters and side effects, but also has euphoria that can be nice, but if you have a choice get Dexedrine or Adderall.