"meth" is not "methamphetamine". "meth" is specifically "crystal meth", a smokable form of methamphetamine which is (much) more dangerous than other 'forms' of methamphetamine and which is not available legally, on prescription or not, anywhere in the world (well OK I don't know for sure about the entire world, but certainly not in any Western country).

You've said this more than once, but you are completely wrong. 'Crystal' is Methamphetamine HCl. Desoxyn is Methamphetamine HCl. They are exactly, 100% the same chemical.

If your issue is with smoking vs. other methods of ingesting, we can talk - but that doesn't make them 'different drugs' any more than Nodoz is a different drug to Caffeine in coffee - Desoxyn being smokeable too, of course, though I'm not sure who would bother.