I'd guess it falls in the category of "don't do that", along with things like using dd to overwrite your failing hard drive with a copy of your shiny new blank drive. You shouldn't take psychedelics therapeutically unless you're set up to have a good experience, I assume.
(I've heard that expectation of your experience actually influences your experience a lot, so it could even be self-fulfilling!)
(I've heard that expectation of your experience actually influences your experience a lot, so it could even be self-fulfilling!)