From personal experience, subjectively speaking, large doses of MDMA are psychedelic in very much the same way as the classic psychedelics like mushrooms and LS

From personal experience, subjectively speaking, large doses of MDMA are psychedelic in very much the same way as the classic psychedelics like mushrooms and LSD. It's a subtle effect, dominated by the stimulant and empathogenic effects, but it's decidedly there, especially when you close your eyes. I suspect such doses are well beyond what's used in therapy though.