Around here, it’s related to the Meth explosion.
Eventually, meth just doesn’t “do it” enough for the heads, and they move on to mainlining heroin.
Meth is still pretty disgusting. It makes me puke to hear of all the foreign substances that people use in making meth, and yet people put that into their own body.
And heroin, that’s pretty awful, awful because it pretty much attaches itself to a person and becomes a permanent apetite.