[stochastic_monk]

It’s pretty clearly D2-like receptors being overexcited, at least as far as cause and effect. Hence psychotic symptoms in stimulant users and a remission of psychosis in schizophrenic patients when on D2-blocking drugs.

[meowface]

D2 receptors are undoubtedly tied to many forms of psychosis, but their being the root cause is not yet proven.