Let's not ignore how a great many people got hooked on these in the first place: Through their doctor.
Here is a relevant article from today:
http://thehustle.co/oxycontin-global
Like tobacco, too much resistance in the US means Oxycontin is going global.
A shame the presidential candidates don't seem (as far as I'm aware) to have mentioned this epidemic as one of the important crisis facing America. Might have resonated deeper than ISIS or some other things.