Psycholytic therapy is a psychotherapeutic approach that uses low doses of psychedelics to gently shift awareness and support exploration in therapy. It emerged in the 1950s and 1960s with substances like LSD and psilocybin, aiming to facilitate insight, emotional processing, and personal reflection.
Unlike high-dose psychedelic therapy that seeks a full psychedelic experience, psycholytic work focuses on subtler effects while staying engaged in talk therapy. The intention is to create a more flexible state of mind without overwhelming perception.
Today the term is rarely used, and people more often refer to low-dose psychedelic sessions. Research interest exists, but evidence is still developing and these sessions are not recognized as medical treatment. For a concise overview of a low-dose truffle session, see this page.
I hope this clarifies what psycholytic therapy means.