In have been on Ritalin LA for someime now, but now I'm changing to Concerta could I plz have some information about it from other people who are on this drug.

Ritalin LA and Concerta are both extended release methylphenidate preparations. The only difference is the release mechanism.

I just started Concerta, and so far, it hasn't done a whole lot for me. Few positive effects, but, on the bright side, no negatives, either.