Around a week ago, I came across this link here on HN that suggested that there's a new form of meth: https://news.ycombinator.com/item?id=28938888 The theory is that new meth is based on a synthesis using a chemical called P2P rather than the old synthesis that used ephedrine. There are claims that this new form of meth is chemically different in some what that started creating schizophrenia around 2017. However, wh…
It doesn't seem to be common in the legal markets, and especially not at the kind of doses addicts would be exposed to.
From Wikipedia on Levomethamphetamine:
> In larger doses (more than 20 mg/day), it loses its specificity for MAO-B and also inhibits MAO-A, which increases serotonin and norepinephrine levels in the brain.
So there is a difference in response at higher doses. I would expect that addicts could be exposed to much more than 20mg/day, which begs the question of whether we even know what several hundred milligrams a day could do.
That's without getting into method of consumption. I'm not a chemist, but would we expect both isomers to break down under heat the same way? Or is the l-meth potentially being converted to something different than d-meth when smoked?
If the issue is the quantity, I would have expected schizophrenia to be constantly present. There's a fixed upper limit on how much people can do in a day, and overdoses have always existed, so there have always been people teetering on the edge. The amount heavy users use hasn't changed, there's just more heavy users and more users in general.
There doesn't seem to be debate that P2P processes create l-meth and d-meth, and that l-meth was less common in earlier versions.
I also don't think there's a debate that l-meth and d-meth have different effects. They're both used in prescription drugs, and those drugs are not interchangeable. You can't treat ADHD with l-meth, and you can't use d-meth in segiline.
None of that is conclusive. It could still be the quantity, or even something we haven't though of like an interaction between meth and fentanyl (which started its rise around 2015). I just don't think the evidence is so weak that we can discard the potential that l-meth is involved.