Derealization after cannabis or psilocybin
If you've felt foggy, detached or unreal since a cannabis high or a psilocybin experience, you're not broken and you didn't permanently damage your brain. Lingering derealization after a substance experience is a recognized stress response, and it usually eases with time and the right support. I'm Paul Walsh, a licensed marriage and family therapist in Portland. I help adults work through it without judgment, in person in Johns Landing or online across Oregon, Washington and California.
In-network: Regence BlueCross BlueShield · Aetna · Moda Health · First Choice Health
What it usually looks like
Many people describe a similar story. A high or a trip turned frightening, often with panic. The panic passed, but something didn't come back all the way. Days or weeks later:
- The world still looks flat, distant or dreamlike
- You feel like you're watching yourself from outside
- You keep checking whether you feel normal yet
- You worry the substance changed something permanently
That last worry is the one I hear most. It's also the one that keeps the feeling going.
Why it lingers after the substance is gone
During intoxication, derealization usually peaks and fades within a couple of hours. When it lasts longer, the substance itself is usually long gone. THC typically clears the body within a few weeks.
What keeps the feeling going is often the fear the experience left behind. Your nervous system stays on alert, you scan yourself for symptoms, and the scanning keeps the fog in place. That's good news: fear and attention are things therapy can help with.
No lectures
In Oregon, cannabis is legal and licensed psilocybin services have been open since 2023. Plenty of people use both thoughtfully. I don't judge your choices, and I won't push you toward any decision about future use. We'll focus on what you're feeling now and how to get your footing back. If you want to talk about how use fits your life going forward, we can do that honestly too.
How therapy helps
- Making sense of what happened. We go through the experience together so it stops feeling like a mystery or a permanent change.
- Calming the alarm. We work on the panic and fear that often started it and keep it going.
- Loosening the checking. You learn to notice the feeling without testing it all day.
- Grounding that fits you. Practical ways to come back into your body and the room.
- Getting back to life. Returning to work, people and the things you enjoy, without waiting to feel 100 percent first.
When to see a doctor as well
Tell a doctor if you have ongoing visual changes after a psychedelic, such as trails, halos or patterns. That's a different condition from derealization. Also see a doctor if you had a head injury, a seizure, or symptoms that are getting worse rather than slowly easing.
Common questions
Can weed cause derealization?
Yes. Cannabis is one of the most common triggers, especially strong THC products or a high that turns into panic. For most people it fades within hours. For some it lingers, usually because of the fear the experience left behind.
How long does derealization from weed last?
It varies. During a high it usually passes within a couple of hours. When it lasts longer, it often eases over weeks to months as anxiety settles. Therapy can help it ease sooner.
Did cannabis or mushrooms permanently damage my brain?
That fear is very common, and lingering derealization is not a sign of permanent damage. It's a stress response that tends to ease as the fear around it eases.
Can psilocybin cause derealization?
Yes, for some people, especially after a frightening or overwhelming experience. It's usually temporary. If it hasn't eased, therapy can help you make sense of the experience and calm your nervous system.
Do I have to stop using cannabis to get better?
That's your decision, and I won't lecture you about it. Many people choose to take a break while they recover, and we can talk honestly about what makes sense for you.
Do you see people who still use cannabis or psychedelics?
Yes. I don't encourage or discourage use. We focus on how you're feeling and what you want for your life.
Start with a free consultation
Book a free 15-minute consultation to talk about what you're going through. Sessions are $200, and I'm in-network with Regence, Aetna, Moda and First Choice Health. For more on derealization in general, see derealization and depersonalization therapy.
Quiet Light Counseling is not a crisis service. If you're in crisis, call or text 988, or go to your nearest emergency room.