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Three Cases of Depersonalization/Derealization Disorder Related to the Use of Classic Psychedelics

Dario Jalilzadeh Masah, Derin Marbin, Tomislav Majić

SUCHT - Zeitschrift für Wissenschaft und Praxis / Journal of Addiction Research and Practice December 1, 2025 DOI: 10.1024/0939-5911/a000959 (opens in new tab)

Study at a glance

AI-extracted from the abstract
Characteristics Case series Case report Peer reviewed
Sample size 3
Population Individuals with depersonalization-derealization disorder after psychedelic use
Intervention Psychotherapy
Duration Several months
Topics Psilocybin
Keywords Psychodynamics Depersonalization Distress Derealization Psychotherapist Psychological intervention Hallucinogen Typology Clinical psychology
Citations 1
Key findings Psychotherapy should be prioritized for psychedelic-related depersonalization-derealization disorder, and exploring the acute drug experience may strengthen the patient relationship and reveal psychodynamic factors.

Abstract

Abstract:

Aims: Symptoms of depersonalization (DP) and derealization (DR) are commonly reported during the acute effects of classic psychedelics. In some individuals, these symptoms persist, resulting in depersonalization-derealization disorder (DDD), associated with distress and help-seeking behavior. This case series seeks to underscore some of the diagnostic challenges and treatment complexities associated with psychedelic-associated DDD from a psychodynamic perspective. Case Report: We present three cases of DDD after the use of psychedelics – LSD, psilocybin and 5-methoxy-dimethyltryptamine – all of whom were treated at our outpatient clinic for post-psychedelic complications. Symptoms emerged shortly after psychedelic exposure and persisted for several months. Psychotherapeutic interventions proved to be helpful. In some cases, initial misdiagnoses delayed appropriate treatment.

Conclusions: Psychotherapy should be prioritized in psychedelic related DDD, while pharmacological treatment ought to be considered as second-line option. Even if treatment is not distinct from DDD unrelated to the use of psychedelics, a thorough exploration of what was experienced during the acute drug effects may have validating effects and strengthen the patient relationship. At the same time, it may facilitate a deeper understanding of the psychodynamic factors underlying individual pathologies.

Comparable studies

Other case reports and case series on psilocybin, most cited first.

Study Year Design Participants
Psilocybin Mushroom (Psilocybe semilanceata) Intoxication with Myocardial Infarction 18-year-old man 1998 Case study n = 1
Relief from intractable phantom pain by combining psilocybin and mirror visual-feedback (MVF) Person with leg amputation and phantom-limb pain 2018 Case study n = 1
Hallucinogen persisting perception disorder after psilocybin consumption: a case study 18-year-old man with HPPD after mixed psilocybin and cannabis intoxication 2005 Case study n = 1
Microdosing psilocybin for chronic pain: a case series Individuals with chronic neuropathic pain 2022 Case series n = 3
Psilocybin and Obsessive Compulsive Disorder Individual with Obsessive Compulsive Disorder 2014 Case study n = 1

Citations in the library

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