Serotonin-like and Antiserotonin Properties of Psilocybin and Psilocin Science June 1, 1962 D. W. Woolley, N.k. Campbell 13 citations Certain compounds that mimic psychosis, which are structurally similar to serotonin, sometimes produce effects like the hormone and sometimes oppose it, depending on the test used. DOI: 10.1126/science.136.3518.777 Psilocybin Hallucinogen Serotonin antagonists 5-HT Receptor +2