"Two forms of #LSD therapy became popular. One, called psychedelic therapy, was based on Osmond and Hoffer’s work, and involved a single large dose of LSD alongside psychotherapy. Osmond and Hoffer believed that hallucinogens are beneficial therapeutically because of their ability to make patients view their condition from a fresh perspective.
The other, called psycholytic therapy, was based on Sandison’s regime of several smaller doses, increasing in size, as a adjunct to psychoanalysis. Sandison’s clinical observations led him to believe that LSD can aid psychotherapy by inducing dream-like hallucinations that reflected the patient’s unconscious mind and enabling them to relive long-lost memories."