Are Adderall and Methylphenidate the same?

Essentially speaking, "meth", Adderall (and other ADD meds), and cocaine are all made up of the same stuff, called Amphetamines. The only difference is their mechanisms of action, which are not yet fully understood. The 'meth' in methamphetamines is an extra molecule which binds on to the amphetamines and makes them last longer in your body. http://en.wikipedia.org/wiki/Amphetamines