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LSD Psychosis or LSD-Induced Schizophrenia?

Michael M. Vardy

Archives of General Psychiatry August 1, 1983 DOI: 10.1001/archpsyc.1983.01790070067008 (opens in new tab)

Study at a glance

AI-extracted from the abstract
Characteristics Observational cohort Peer reviewed
Sample size 81
Population Patients hospitalized for LSD psychosis and matched first-break schizophrenics
Duration 3-5 year follow-up
Topics LSD
Keywords Psychosis Schizophrenia object-oriented programming Clinical psychology Population Hallucinogen
Citations 145
Key findings LSD psychotics were fundamentally similar to schizophrenics in genealogy, phenomenology, and course of illness, supporting a model of drug-induced schizophreniform reaction.

Abstract

We studied whether patients hospitalized for LSD psychosis are clinically separable from acute schizophrenics. The family histories, manifest symptoms, premorbid adjustment, and profiles on an extensive test battery were analyzed for 52 LSD psychotics and 29 matched first-break schizophrenics. The LSD patients did not differ from schizophrenics in incidence of psychosis or suicide among the parents. However, the rate of parental alcoholism for LSD psychotics far exceeded that for schizophrenics and the general population. The two groups were distinguished on some clinical features but were equivalent in premorbid adjustment, on most cognitive measures when initially hospitalized or reassessed three to five years later, and in number of subsequent rehospitalizations. Thus, in most respects the LSD psychotics were fundamentally similar to schizophrenics in geneaology, phenomenology, and course of illness. The findings supported a model of LSD psychosis as a drug-induced schizophreniform reaction in persons vulnerable to both substance abuse and psychosis.

Comparable studies

Other observational and cohort studies on LSD, most cited first.

Study Year Design Participants
Increased Global Functional Connectivity Correlates with LSD-Induced Ego Dissolution. Human participants 2016 Observational cohort
Increased spontaneous MEG signal diversity for psychoactive doses of ketamine, LSD and psilocybin Humans 2017 Observational study
Classic psychedelic use is associated with reduced psychological distress and suicidality in the United States adult population. USA adult respondents from the National Survey on Drug Use and Health (2008-2012) 2015 Observational cohort n = 190,000
Psychedelics not linked to mental health problems or suicidal behavior: A population study Randomly selected United States adults 2015 Observational cohort n = 135,095
Whole-Brain Multimodal Neuroimaging Model Using Serotonin Receptor Maps Explains Non-linear Functional Effects of LSD. Healthy human participants 2018 Observational study with computational modeling

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