Ritalin, Concerta, and Metadate are all forms of Methylphenidate.

Some of the differences between Metadate CD and Concerta are:

Concerta is availble in 18,27,36 and 54 mg while metadate is currently only availble in 20 mg.


One does of concerta is supposed to last 10 to 12 hours while Metadate is supposed to last 4 to 8 hours.