There was an NYT article not too long ago whose entire point is that "true" psychedelic drugs are too dangerous to go mainstream, but isolated chemical compounds that provide some of the chemical effects of LSD / Mushrooms / Ketamine without the "trip" were a much better way to go. The reasoning was that they could engineer a way to chemically induce neuroplastic change in the brain without the liability of visual or…
The visual/audio effects aren't what gets you on a trip, though. It's the headspace, the distortion of "automatic self-recognition", and to some extent, the role of the crucial 5-ht2a receptor in the sleep-wake cycle: all 5-ht2a antagonists are soporific, and almost all psychedelics produce insomnia as a side effect. A bad trip leading to worse after-effects practically always proceeds through a sleepless night.