Well you know you start with pseudo/ephedrine, and you end up with methamphetamine.
And your asking what happens inbetween?

UTFSE! the byproducts/intermediates produced during a rxn is one of the most talked about topics at the hive!

Was such a question worth the bad karma?

What method are you using to get to meth?  Knowing  this then someone can comment on your question, since there are many ways to get there........java