[mrob]

It's common to distinguish between "psychedelics", which primarily function via serotonin receptors, and "dissociatives", which primarily function via NMDA receptors.

[alan-hn]

The term psychedelic is describing specific subjective effects rather than a mechanism of action, what you're thinking of are the classic serotonergic psychedelics which are 5ht2a agonists but ketamine and other dissociatives can be considered dissociative psychedelics

[cess11]

Not really. Cannabis and salvinorins are commonly used for psychedelic effects. Many psychedelic compounds cause dissociation, e.g. LSD.