Do some research and find the orrigions of methadone..
If you trace it Back to Hitler and the Nazis inventing it you are correct.
Its was inventented in the war when Poland (or one of them countrys).
Stopped the supply of Morphiene to the Nazi troops.
So hitlers sceintests had to develop a sythietic Opiate For his wounded soldiers and Methadone was the outcome....

just an interesting bit of info for ya..