What are characteristics of dissociatives?

Ketamine, PCP, Dextromethorphan (DXM), and the gaseous anesthetic, nitrous oxide (inhalant ?) Distinguished pharmacologically and clinically from true hallucinogens: - hallucinogens affect primarily 5HT2A receptors instead of NMDA receptors - hallucinogens are associated with a different 5HT2A- associated clinical syndrome of intoxication: dissociation or impaired reality testing is less typically involved and visual hallucinations are more commonly involved