Do you have the text of it? Wikipedia has a small quote which doesn't back it up: "The 3 patients in whom an extended psychosis followed a single ingestion of

Do you have the text of it? Wikipedia has a small quote which doesn't back it up: "The 3 patients in whom an extended psychosis followed a single ingestion of LSD clearly had long standing schizophrenia..." The page on it is here: https://en.wikipedia.org/wiki/LSD_and_schizophrenia https://en.wikipedia.org/wiki/LSD_and_schizophrenia - there doesn't seem to be any strong studies. A small increased risk is possible/likely. On the flip side, many folks seem to feel LSD is one of the most meaningful experiences they've had in life. It seems reasonable that healthy people should seek out such an experience in a controlled, safe, environment.