TL;DR
- •Derealization is a specific form of dissociation where your surroundings — not yourself — feel unreal, dreamlike, foggy, or detached.
- •It's closely related to depersonalization (where you feel unreal) and the two often co-occur, but derealization is specifically about the world feeling "off."
- •Brief derealization is a normal response to acute stress, sleep deprivation, panic, or cannabis use — many healthy people experience it occasionally.
- •It becomes clinically significant when persistent, distressing, or affecting function — and is commonly associated with anxiety disorders, panic disorder, PTSD, and depression.
- •First-line treatment depends on the driver: trauma-focused therapy for PTSD-related, CBT and SSRIs for anxiety-driven, grounding techniques as a baseline skill.
- •Because ketamine produces a controlled dissociative state, patients with prior pathological derealization need specific screening before treatment.
What this can look like
- •Familiar places looking subtly "off" — like a stage set or a video-game version of where you actually are
- •A sense of glass or fog between you and the world; colors seem muted or visual depth feels flat
- •Sounds feel muffled or as if they're coming from far away
- •Time perception shifts — minutes feel like hours, or hours pass without sense of duration
- •Loved ones' faces look slightly unfamiliar despite knowing intellectually who they are
- •Brief episodes after stress, panic, or poor sleep that resolve once you "settle"
Commonly associated with
This is descriptive, not diagnostic. Having this symptom doesn’t mean you have any of these conditions — only a clinician can make that determination.
Panic disorder
Derealization commonly occurs during or after a panic attack — the perceptual shift can be more distressing than the racing heart and is often what brings patients to the ER.
PTSD and trauma-spectrum conditions
Derealization is part of the dissociative subtype of PTSD — recurring perceptual disconnection can be triggered by trauma reminders even in objectively safe contexts.
Generalized anxiety disorder
Chronic anxiety can produce a background derealization that intensifies during anxious episodes and recedes during calmer periods.
Depersonalization-derealization disorder
When derealization is persistent (months or years), affects function, and reality-testing remains intact, the clinical pattern can meet criteria for depersonalization-derealization disorder.
Substance-induced states
Cannabis (especially high-THC), hallucinogens, and dissociatives can trigger derealization that sometimes persists after use stops — distinguishing substance-driven from primary derealization matters for treatment.
Self-help patterns
Patterns that may complement professional treatment — not substitutes for it.
- •Grounding through the senses — naming five things you can see, four you can touch, three you can hear; the act of attending to concrete detail re-engages perception
- •Cold exposure (ice cube in hand, splashing cold water on the face) interrupts derealization episodes for many people
- •Reduce or eliminate cannabis — it's one of the most consistent perpetuating factors for derealization in patients prone to it
- •Regular sleep and reduced caffeine — both sleep loss and caffeine load amplify derealization in vulnerable patients
- •Track triggers — derealization often has identifiable patterns (specific places, levels of stress, post-panic states) that aren't obvious without logging
When to seek professional help
- •Derealization is occurring most days or persistently
- •It's affecting your ability to work, drive, or care for others
- •You have an identifiable trauma history and derealization feels connected to it
- •You're using cannabis or other substances to cope and the pattern is worsening
- •You're considering ketamine therapy and have prior dissociative experiences worth screening for
Treatment options
Treatment depends on what's driving the derealization. For trauma-related cases, trauma-focused psychotherapy (EMDR, sensorimotor, IFS, prolonged exposure) is first-line. For anxiety- or panic-driven cases, CBT with grounding components plus SSRIs or SNRIs is the standard combination. For persistent depersonalization-derealization disorder, lamotrigine has the most evidence among medications, though no FDA-approved option exists specifically. Ketamine therapy is a special case for these patients — its dissociative mechanism overlaps with the symptom and requires specific clinical evaluation.
Where ketamine fits
This needs careful clinical care. Ketamine produces a controlled dissociative state that overlaps with derealization itself. For patients whose primary complaint is persistent derealization, ketamine is generally not first-choice and may amplify the pattern. For patients with derealization as part of a broader treatment-resistant depression or PTSD picture, ketamine can be appropriate — but requires explicit screening of the derealization history, adapted dosing, and longer integration sessions. Tovani screens for these patterns during consultation and adjusts the protocol accordingly.
Check eligibility for ketamine therapy5-minute screening · Reviewed by a board-certified physician · FL & NJ
Frequently asked
Is derealization dangerous?
No — derealization itself isn't medically dangerous. It's subjectively distressing but doesn't indicate brain damage or imminent psychosis. The clinically meaningful question is whether it's persistent, what's driving it, and how much it's affecting your function.
Will derealization go away on its own?
Brief stress-driven episodes usually resolve once the underlying state settles. Persistent derealization (weeks to months) is less likely to resolve without treatment, especially when an underlying anxiety, PTSD, or depressive picture is driving it. Earlier evaluation generally produces faster recovery.
Can cannabis cause permanent derealization?
Cannabis-triggered derealization is real and well-documented. In most patients, it resolves over weeks to months after stopping. In a smaller subset, it persists longer and meets criteria for cannabis-induced or persistent depersonalization-derealization disorder. The first step in either case is stopping cannabis use and getting clinical evaluation.
Should I try ketamine if I already have derealization?
Generally not as a first-line option, and only after specific clinical evaluation. Ketamine's dissociative mechanism overlaps with the symptom you're already experiencing, which can be unpredictable. For patients with both depression or PTSD AND derealization, ketamine can be appropriate with adapted protocols — but the consultation needs to address the dissociative history explicitly.
What's the difference between derealization and psychosis?
In derealization, reality-testing is preserved — you know the world is real even though it feels unreal. In psychosis, reality-testing is impaired — the person genuinely believes their unusual perceptions. Derealization is distressing precisely because you can recognize the gap between how things feel and how they are. A clinician can help distinguish them when the pattern is unclear.
References
- Murrough JW et al. 2013, American Journal of Psychiatry. Ketamine RCT in treatment-resistant depression — the dissociative effect was characterized as part of the protocol and did not predict response or non-response, informing how to approach patients with dissociative complaints. PMID 23982301
- Sanacora G et al. 2017, JAMA Psychiatry. APA consensus on ketamine in mood disorders — addresses screening considerations including prior dissociative experience as a factor in treatment planning. PMID 28249076
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