Here is a scientific study that states that individuals can indeed lose themselves for YEARS after large doses are taken:
“Hallucinogen Persisting Perception Disorder”(HPPD), which appears to be particularly associated with LSD. Halpern and Pope  reviewed 20 quantitative studies from 1955 to 2001 and concluded that the occurrence of HPPD is very rare, but, when it occurs, it typically will have a limited course of months to a year, but can, in some even rarer cases, last for years with considerable morbidity.”
An abstract from NCBI about the similarities and differences between LSD-related psychotic breaks and schizophrenic patients.
Heres an article about how the government was using LSD on unsuspecting military personelle,( A TIME article) and another (from the NY Times) about how those being experimented on died, suffered psychological damage or went mad.
and a fact sheet from the DEA stating death or psychosis are indeed symptoms of LSD overdose. (I’m not sure I entirely believe the DEA because of their conflicts of interest in the “war on psychedelics”- but it is a synthetic. Lots of things, including water, in large enough quantities can kill you. )
Call it dubious, but do your research- most studies regarding LSD and related overdoses are indeed outside of the realms of US involvement due to its schedule 1 priority. LSD overdose is a real phenomenon. LSD-related deaths have occurred that were not related to self-harm.