Placebos actually do work even if the patient knows they are placebos (source: https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0015591 https:/

Placebos actually do work even if the patient knows they are placebos (source: https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0015591 https://journals.plos.org/plosone/article?id=10.1371/journal...), but regardless, how do you keep the patients from finding out that the psychedelics are just placebos? Why not just use some other realistic-sounding placebo like a rare herb or something?