</font><blockquote><div id="quote"><font class="small">Quote:</font>
WinterRose said:
Do Concerta and Adderall use different chemicals?

</div></font></blockquote><font class="post">Yes.

Concerta = methylphenidate
Adderall = mixed amphetamine salts, including d-amphetamine and l-amphetamine (chemical mirror images of each other)
Vyvanse = Lisdexamfetamine, which is broken down into the amino acid lysine and d-amphetamine (the active drug)

If you want an extended release form of Concerta, there is now a patch that you wear called Daytrana, which releases methylphenidate continuously. With this maybe you wouldn't need to supplement late in the day.