@jackie jones Indeed, I find DXM to be something unique too - while I certainly find the arylcyclohexylamine dissociatives like K to be more warm and bright overall, they too lead more to escapism and don't have the potential of DXM to unlock suppressed or otherwise hidden memories. It was my very first chemical and already then, over 13 years ago, it came with a sense of nostalgia - one of the most impressive trips, not of overwhelming intensity but because it was so distinctive, seemingly easy yet completely non-graspable, was when I watched a historical movie that played on board of a sailing ship on an old tube TV on a maybe moderate 2nd plateau trip ... the whole movie had a strong feeling and even taste (in a synesthetic meaning) of
nostalgia - I assume that this probably won't trigger any memory in most, and I really can't explain better for now but it might be related to the feature of uncovering hidden memories.
But thought that DXM was, curiously, in most western countries at least, and in opposition to the other moderate strength cough suppressant codeine, an OTC drug due to the fact that it had been approved for ages now and restrictions were much lighter back then. Just Switzerland made it prescription only the last year, partially because of so-called abuse but the main reason was that codeine had been the same category.
I am curious about the sigma receptor relation, as DXM appears to be a decent sigma1 agonist and a moderate sigma2 one, many other dissociatives together with other recreational drugs share thus affinity but it's said that sigma agonism alone wouldn't have real effects on its own - another source, I thought the wikipedia article to the sigmaergic noscapine, lists it was being abused similarly to DXM. We have the antidepressant fluvoxamine which has benefits for OCD and is said to be superior than other antidepressants for certain types of depression because of the sigma agonism, the antagonist sertraline had horribly bad effects and we have pre-087 (which I never managed to acquire due to lack of EU resellers) that is said to be antidepressant and reinforcing. Venlafaxine gets potentiated by sigma agonists and it + DXM make a nice combo.. Yet is it all about sigma1 while DXM is also a sigma2 agonist.
Yeah, DXM has decent visuals

sometimes they can be more or less directly influenced by willpower, yet aren't one to one changing with what's in your mind but more so if you want to
see something. Like a new, dissoverse-only sense! I could construct random objects up to the interior of a whole spaceship - OEVs at nighttime - but again all just in black & white as I since many years am somehow unable to get any more colorful visuals, from most substances like K even no visuals at all

just yesterday 1cP-LSD (+ little DXM) gave me full on LSD optics, very unlike the red-yellow-green morphing ones of mushrooms but absolutely like on many LSD pictures so I guess they were the full deal and truly amazing, a hyperspace intertwined with our reality, like a hypermatrix made out of weird little gears, locks and puzzle pieces of fern.
Unfortunately DXM also has a distinct visual synergistic feeling to me, one that I don't like. It feels
fluidly solid, like quicksilver ... in early times it felt more like syrup I guess, but the quicksilver is really annoying. I truly miss the nostalgia and overall magic feelings of my youth ... yet
absolutely no auditory hallucinations aka "voices" even with DXM + 1cP-LSD + morphine on comedown.
Don't let doctors to fool you into so-called "paranoid schizophrenia" and don't take antipsychotics when they don't feel right.
The theory is flawed as hell. They think we had a neurotransmitter specific for psychosis, and that it was either DMT, a sigma agonist or a NMDA antagonist and all is wrong. Psychosis is probably a disruption of processing, something which can happen in 10'000 different ways (like if your computer wouldn't blue screen but continue to work in a corrupted state, leading to e.g. pixel / block mess on TV etc..) and certainly we don't have a specific transmitter for crazyness...! Man, that old war on drugs. Sigh.