"Reactions that are prolonged (days to months) and/or require hospitalization
are often referred to as "LSD psychosis," and include a heterogenous
population and group of symptoms."
"In spite of the impressive degree of prior problems noted in many of these
patients, there are occasional reports of severe and prolonged reactions
occuring in basically well adjusted individuals."
Also, one famous example of "bad trips" (maybe with "prior problems"):
https://erowid.org/chemicals/lsd/lsd.shtml