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There are some psychedelics (maybe 2CB, 4-Ho-Met too?) that give trippy visuals but are known for being less “in your head”.

Popular with ravers because they’re easier to handle on the dance floor.

It would be interesting to identify drugs that behave in this way and use them as comparators.

> and give the control group something that elicits a “trippy but not psychedelic experience”

The doses of benadryl they were giving them as an "active placebo" are approaching levels where you do start to get some... Interesting (and often extremely distressing) deliriant effects.

0/10 would not recommend tripping on benadryl,

Studies often use amphetamine as a control. Many psychedelics have a stimulant nature to them.