On a different note, something I've been meaning to query for a bit- know of any decent compendium of descriptions or videos of what people look like on various kinds of substances/differential "tells" for substances? There's no way this doesn't exist.
I will hunt around.
I will say personally with someone on opiates it can be very hard to tell unless they are out of pills...sometimes the eyes will give it away, sometimes not.
Lol, what people look like on opiates is one of the things I'm least questioning (the eyes really are a decent giveaway). One example is I've heard that I'm less sure on but makes sense is that powder cocaine has more subtle tells than crack (one you're a little fidgety, maybe a coke jaw, the other you can't hold still).
As someone who's on the therapist side of a lot of drug addicts but stays the fuck away from that in my own life, I can see through bullshit pretty easily, especially over time, but diagnosing in real time exactly what cocktail someone's on is something that's a lot easier for people who have "lived experience." Not that it ends up mattering all that much- you come *into* therapy fucked up enough that you can't hold still or are nodding out or smell like a college dorm or a bar or whatever it is, you've got a drug problem- but I'd be curious to know if there's resources out there that are any good.