Much of the history of pharmacology and therapeutics involves finding new uses for old drugs. The latest rediscovery is that of psychedelic drugs. Since they can cause profound distortions of perception and were once used as part of religious ceremonies, such research may seem unusual at this time.
Sellers, E. M. (2017). Psilocybin: Good Trip or Bad Trip. Clinical Pharmacology & Therapeutics. 10.1002/cpt.697
Link to full text