there are many studies about these medicines - curious where this statement that there are none is coming from?
here's a tip of the iceberg, a good place to start --
https://www.nature.com/articles/s41591-021-01336-3
https://www.tandfonline.com/doi/abs/10.3109/00952990.2016.11...
https://www.hopkinsmedicine.org/news/newsroom/news-releases/...
https://www.hopkinsmedicine.org/news/media/releases/hallucin...
https://www.hopkinsmedicine.org/news/media/releases/magic_mu...