How Psychedelics Shape the Experience of Catastrophic Events
The Nova Festival attack is a living laboratory of psychedelic effects on trauma.
Posted November 18, 2025 | Reviewed by Hara Estroff Marano
The horrific October 7, 2023, attack at the Nova Music Festival in Israel represents a tragic but important moment in the history of trauma research. For the first time, a major mass-casualty terror event occurred when most victims were under the influence of psychoactive substances.
This convergence of psychedelic intoxication and extreme trauma generated a rare opportunity to retrospectively analyze how altered states of consciousness affected real-life responses to life-threatening situations. Thus a new line of research, some already published and some still in process, has emerged from this tragic event.
Why This Research Is Different
Until these recent studies, published literature on psychedelics focused heavily on therapeutic uses in carefully-controlled research environments. Almost nothing was known about how psychedelics could shape perception, cognition , and emotional processing during a catastrophic event.
I reviewed the data from the 343 festival attendees aged 18-64 (189 women, 154 men): Fifty-seven had used classic psychedelics (psilocybin, LSD, or mescaline), 133 had used cannabis, 147 had consumed alcohol , and 124 had taken MDMA (Ecstasy) one to five hours before the attack. Those who took psychedelics such as LSD or psilocybin experienced lower rates of PTSD and anxiety , as I reported previously .
The first new study, published in November 2025, by Simon et al., examined experiences of survivors through a neurophenomenological lens, identifying how psychedelic intoxication influenced survival responses, emotional processing, and post- traumatic integration. The authors of the study name this "adaptive psychedelic dissociation," a combination of traumatic and psychedelic dissociative features: emotional detachment, derealization and depersonalization, automatic behaviors, and preserved functionality. Survivors believed psychedelic subjective effects were suppressed during the acute trauma exposure, resurfacing after the life-or-death threat was over. Counterintuitively, the majority thought being under the influence helped them survive.
The second study,also by Simon et al., which will be published in December 2025, was from semi-structured interviews with 45 Israeli survivors (25 male, 20 female), recruited through a nonprofit trauma support organization. All participants had been under the influence of at least one psychoactive substance during the attack and were engaged in psychological support afterward.
It suggests psychedelics alone don’t heal trauma; rather, they destabilize networks through which trauma is given meaning, and healing or injury that follows depends on relational and cultural frameworks around the individual. This study may challenge conventional assumptions about what works in trauma recovery by emphasizing the importance of culturally sensitive, system-level approaches to collective trauma recovery and emphasizing the need for trauma services that incorporate community-led care and nonjudgmental engagement with altered states of consciousness.
What the Nova Rave Survivor Studies Show
The studies identified three phases of survivors’ experiences: immediate survival, in-event emotional coping, and post-event processing. During the attack, participants often reported that psychedelic effects seemed to recede temporarily, allowing instinctual survival processes to dominate. Many described sharpened attention , rapid decision-making , and an unexpected capacity for calm amid extreme chaos. Others recalled experiencing time as slowed or fragmented, a known effect of psychedelics and acute trauma. Some survivors described heightened sensory acuity—perceiving details, sounds, and movements with unusual clarity—as though the psychedelic state magnified helpful perceptual channels while muting emotional ones.
These reports align with what’s known about acute stress physiology: In life-threatening situations, the sympathetic nervous system triggers fight-or-flight responses, overriding many cognitive states.
Still other survivors reported spiritual interpretations of their experiences, feeling a sense of destiny or profound meaning, even during the attack. While this reaction may have supported survival in the moment, it contributed to emotional consequences later, and for many, the absence of appropriate fear during the event subsequently caused confusion, guilt , or shame . Some questioned whether their muted emotions reflected failure to comprehend the gravity of the situation or whether drug use distorted their moral or psychological responses. These concerns highlight many challenges for survivors, who may struggle not only with the event itself but also, later, with interpreting their own emotional reactions—or lack of them—to it.
Return of Psychedelic Effects After Acute Danger
A striking pattern across survivors’ testimonies: After the threat passed there was sudden re-emergence or intensification of psychedelic effects. Once survivors reached relative safety, the psychedelic experience often flooded back. Survivors described vivid hallucinations, existential reflections, or bodily sensations amplified beyond typical psychedelic experiences. This resurgence coincided with shock, grief , and dawning awareness of the catastrophe.
Trauma disrupts normal memory processes, and psychedelic-induced alterations in cognition can complicate the organization and integration of traumatic memories.
Adaptive Dissociation
The qualitative studies by Simon et al. introducing the concept of adaptive psychedelic dissociation define it as a state that blends dissociative detachment with preserved executive function . In the Nova context, dissociative qualities appear to have allowed survivors to navigate life-threatening situations with clarity, determination, and emotional detachment. Many reported that feelings of fear, panic, and overwhelming terror—expected responses to an armed attack—were blunted, and the combination of psychedelic influence and instinctual survival responses produced psychological responses sometimes preventing panic-driven mistakes. Dr. Joshua Siegel’s pioneering neuroimaging research at Washington University in St Louis and, most recently, NYU may explain the Nova observations.
Siegel’s real-time brain effect data and Simon’s phenomenological findings describe different layers of the same underlying process: a psychedelic-induced mental state that may mute immediate stress responses and open a plasticity window for revising traumatic memories.
In a series of high-resolution, repeated fMRI studies, Siegel’s group demonstrated that psilocybin produces profound, multiscale desynchronization across the brain, disrupting functional connectivity. The most substantial effects occurred in the default mode network (DMN), the part of the brain that usually works during daydreaming or non-focused thinking. This desynchronization represents loosening of the brain’s intrinsic networks governing self and autobiographical memory. Crucially, Siegel also found that task engagement forces the brain to recruit more structured patterns of connectivity, temporarily overriding the desynchronized psychedelic state.
The Nova survivors’ emotional blunting during the attack aligns with Siegel’s findings. If psychedelic desynchronization weakens tight coupling between the DMN and anterior hippocampus, then emotional and autobiographical coherence is temporarily loosened; the self-narrative machinery that typically organizes emotional reactions operates in a disrupted regime.
This state could reduce fear and panic, explaining survivors’ frequent reports of unexpected calm or depersonalized clarity. In Simon et al., this dissociative clarity was adaptive, enabling goal-directed action under conditions that were impossibly threatening.
From Siegel’s perspective, this corresponds to a DMN temporarily decoupled from limbic memory circuits, producing a psychological state in which individuals experience themselves not as the center of a narrative in danger, but as an agent performing immediate survival tasks without the usual emotional load. Extreme threat can transiently reverse or suppress this destabilization, explaining the “on-off” quality of the psychedelic experience during the Nova attack.
Siegel’s most provocative contribution was his observation that psilocybin leaves the brain in a “loosened” state for weeks. This finding provides a network-level explanation for Simon’s emphasis on a prolonged integration window following the event. Psychedelics allowed bottom-up perceptions and emotions to dominate. Importantly, during moments of acute danger, the psychedelic state apparently switched off, with survivors reporting heightened focus, calm, or automatic yet effective action.
If the circuitry responsible for linking episodic memories to one’s autobiographical self-story is weakened for weeks, trauma memories acquired during the psychedelic state may be susceptible to reorganization. This could be adaptive or maladaptive depending on the social and relational environment.
The emerging studies on Nova Festival survivors provided unprecedented insight into the interaction between psychedelics and extreme trauma. They reveal that psychedelic intoxication does not simply amplify vulnerability. Understanding how psychedelics interact with trauma not only enriches clinical practice but also deepens our appreciation of human resilience under unimaginable circumstances.
Survivors often experienced emotional blunting, intense perceptual alterations, and dissociative clarity, all of which could enhance survival in the moment but complicate emotional integration afterward.
Simon G, Gal-Birman M, Tadmor N, Halperin D. Facing trauma under the influence of psychedelics: A phenomenological study with Nova rave survivors. J Psychopharmacol. 2025 Nov 11:2698811251372508. doi: 10.1177/02698811251372508. Epub ahead of print. PMID: 41217093.
Simon G, Gal-Birman M, Tadmor N, Halperin D, Ben-Zion Z. Psychedelics and collective trauma: multisystemic resilience and recovery pathways among Nova festival survivors - a qualitative study. Eur J Psychotraumatol. 2025 Dec;16(1):2582303. doi: 10.1080/20008066.2025.2582303. Epub 2025 Nov 12. PMID: 41222082; PMCID: PMC12613306.
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Padawer-Curry JA, Krentzman OJ, Kuo CC, Wang X, Bice AR, Nicol GE, Snyder AZ, Siegel JS, McCall JG, Bauer AQ. Psychedelic 5-HT2A receptor agonism alters neurovascular coupling and differentially affects neuronal and hemodynamic measures of brain function. Nat Neurosci. 2025 Nov;28(11):2330-2343. doi: 10.1038/s41593-025-02069-z. Epub 2025 Oct 13. PMID: 41083844.
Karp Barnir E, Rubinstein Z, Abend R, Lev-Ran S, Naor L, Mikulincer M. Peri-traumatic consumption of classic psychedelics is associated with lower anxiety and post-traumatic responses 3 weeks after exposure. J Psychopharmacol. 2025 Apr 21:2698811251334025. doi: 10.1177/02698811251334025. Epub ahead of print. PMID: 40256869.
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Mark S. Gold, M.D., is a pioneering researcher, professor, and chairman of psychiatry at Yale, the University of Florida, and Washington University in St Louis.
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