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Are you sure about that? I have only heard of Ritalin being a brand name for methylphenidate, where in the world does it refer to amphetamine?

Took Ritalin/Concerta most of my life, this is very wrong. Ritalin is Methylphenidate and only Methylphenidate.

Variables are dosage in MG, XR or IR.

There are no way this statement is true

Are you sure? Maybe dext- is Aderall? I take Ritalin and it’s always methyl-

I've never heard of this .Ritalin is methylphenidate.

Do you have any sources ?