What Happens to Cortisol During a Psychedelic Session

What Happens to Cortisol During a Psychedelic Session

1. Opening Hook: The Moment I Felt Time Slow and My Breath Ease

I’ll never forget the afternoon I sat quietly with psilocybin mushrooms, staring at the shifting patterns on the rug beneath me. At first, my mind raced. Thoughts tangled like a storm. My chest tightened, heart racing, the overwhelming sense of pressure I hadn’t even noticed before creeping in. I was nervous, jittery - the classic signs of that old enemy, cortisol, pumping through my veins.

Then, something unexpected happened. As the journey deepened, the storm calmed. The tightness in my chest loosened, breaths slowed down, and a strange sense of stillness settled inside. It felt as though my body released the tension it had been holding for years. My cortisol, which had been participating in a kind of high-alert watch, seemed to quiet. I was left with a calmness so deep that it felt almost alien.

That experience sparked a question I often hear from curious souls dipping their toes into psychedelics: what really happens to cortisol during a psychedelic session? Does it rise, fall, roller-coaster wild, or gently ferry you to peace? Coming from years of working with mushroom medicine and watching countless sessions unfold, I can say this is a question worth peeling apart layer by layer.

Cortisol is a hormone we all know by reputation, often labeled the “stress hormone,” but that name barely scratches the surface of what it actually does. It’s involved in wakefulness, energy regulation, immune response, and adapting to challenges. In a psychedelic session, where your brain chemistry swings and perception rewires, cortisol levels might tell us a lot about how the body handles stress, emotion, and transformation.

So if you’ve ever found yourself wondering whether psychedelics calm your body’s alarm system or trigger it, you’re not alone. I want to share what science, experience, and research have revealed about the dance between psychedelics and cortisol. This is not some quick over-the-top claim but a careful, layered understanding that can help you prepare for your own journeys, whether you’re a curious newcomer or a seasoned explorer.

As you read through this piece, you’ll hopefully gain insights that deepen your relationship to your body during these intense sessions. And maybe, like me, you’ll find something comforting in knowing how your biology interacts with the mysterious, mind-opening effects of these medicines.

2. Core Concept: Cortisol’s Role in the Body and How Psychedelics Might Influence It

Cortisol is secreted by the adrenal glands in response to stress and low blood glucose levels. It’s part of the hypothalamic-pituitary-adrenal (HPA) axis, a major neuroendocrine system controlling our biological response to stress. Cortisol’s job is to mobilize energy by increasing glucose availability, suppress the immune system when necessary, and help the body return to homeostasis after a challenge.

However, chronic elevation of cortisol can be harmful, leading to symptoms like anxiety, depression, memory problems, and even physical ailments such as immune dysfunction or high blood pressure. So, cortisol is a double-edged sword - necessary for survival but dangerous when unbalanced.

During a psychedelic experience, the brain enters an altered state where serotonin receptors, especially 5-HT2A, get activated. This activation triggers a cascade of changes in neural circuits responsible for perception, emotion, and cognition. Given that the serotonin system closely interacts with the HPA axis, it’s reasonable to expect that psychedelics influence cortisol production.

Interestingly, the relationship between psychedelics and cortisol isn’t straightforward. Early acute responses during the onset phase might involve a mild spike in cortisol due to physiological arousal or anxiety. But as the session unfolds, the overall effect often trends toward a reduction in cortisol, coinciding with the body’s relaxation and emotional release.

Richard Griffiths and Roland Griffiths, pioneers in psychedelic research, emphasize that these compounds can facilitate a “reset” of various neurochemical systems. This reset might include modulating the HPA axis towards healthier regulation. Another important figure, Robin Carhart-Harris, has shown through brain imaging how psychedelics dampen activity in the default mode network and alter connectivity patterns, potentially influencing stress responses controlled by cortisol.

In short, cortisol during a psychedelic session may dance to two tunes: a brief increase early on due to arousal, followed by a sustained decrease as the body relaxes and processes emotional contents. This pattern supports the idea that psychedelics can help “loosen” the chronic grip of stress and anxiety anchored in high cortisol levels.

3. Research and Evidence: What Science Says About Psychedelics and Cortisol

The scientific community has been cautiously building evidence on how psychedelics affect cortisol. One key study by Dolder et al. in 2015 looked at cortisol levels in volunteers given LSD. Their results showed an acute increase in cortisol shortly after administration, followed by normalization as the drug’s peak effects settled. This reflected the initial stress-like physiological reaction that leveled off later.

In a more recent trial, researchers at Imperial College London led by Robin Carhart-Harris examined psilocybin (the active molecule in magic mushrooms). They found that while cortisol spiked slightly early in the session, participants reported reduced anxiety and stress long after the experience. Carhart-Harris’ team hypothesized that these acute endocrine changes might set the stage for longer-term neuroplasticity and emotional healing.

A fascinating study published in the Journal of Psychopharmacology in 2017 measured saliva cortisol before and after psilocybin sessions. Volunteers showed lower baseline cortisol on follow-up visits weeks after their sessions, suggesting potential lasting regulatory effects on the HPA axis. These results line up with the subjective reports of reduced stress and depression seen in clinical trials.

Then there’s the work of Stanislav Grof, a legendary figure in psychedelic therapy. Though primarily clinical and experiential rather than biochemical, Grof observed that deep psychedelic experiences often led to deep emotional catharsis, which can correlate with cortisol normalization. These “peak moments” often involve facing past trauma and releasing long-held stress, potentially resetting hormonal imbalance.

For those interested in the physical side of stress, Bessel van der Kolk’s The Body Keeps the Score offers a brilliant exploration of trauma’s impact on cortisol and the nervous system. While not about psychedelics specifically, his work provides a structure for understanding how releasing stored stress through various therapies, including psychedelics, can lower cortisol and improve health.

All these studies hint at a complex but promising relationship: while psychedelics can cause a short burst of cortisol due to the body's alertness, they often lead to better long-term hormonal balance. This aligns with the growing body of evidence showing psychedelics' potential to alleviate conditions linked to chronic stress and dysregulated cortisol.

4. Practical Application: How to Support Healthy Cortisol Levels in Your Psychedelic Journey

If you’re considering a psychedelic session, knowing how cortisol behaves can help you prepare and get the most out of the medicine. First off, accept that some initial nervousness or a mild spike in stress hormones is normal. Your body is gearing up for an intense experience. That’s not a sign of failure but a natural alarm system doing its job.

During the session, try to cultivate a mindset of curiosity and surrender rather than resistance. This can help prevent the cortisol spike from escalating into overwhelming anxiety or panic. Deep, slow breathing is an excellent tool. It activates the parasympathetic nervous system and can bring cortisol levels down in real time.

Set and setting matter immensely. Being in a safe, comfortable environment with trusted guides or friends reduces stress. This indirectly keeps cortisol levels more stable because your body doesn’t perceive a threat. I’ve seen countless sessions where just a warm presence lowered the physical tension in people’s bodies, easing their journeys.

Post-session practices also influence cortisol regulation. Journaling your experience in a dedicated space, like a Journaling Notebook Leather Bound can be incredibly grounding. Writing helps process emotional insights, reducing lingering stress and preventing rumination - the culprit behind persistent cortisol elevation.

Integrating mindfulness and gentle movement like yoga or walking in nature supports the HPA axis too. I often recommend clients combine their psychedelic sessions with these daily rituals. They help the body reset from hyperarousal and reinforce new, calmer stress patterns.

Lastly, pay attention to your diet and sleep. Both dramatically influence cortisol. Avoid stimulants like caffeine before your session, and prioritize rest afterward. Psychedelic healing works best when your body is nourished and rested, allowing cortisol levels to gently recalibrate.

5. Common Challenges: Navigating Cortisol Surges and Emotional Overwhelm

One of the toughest parts of a psychedelic session can be managing moments when stress flares up unexpectedly. Sometimes, cortisol surges hit like a tidal wave - heart pounds, breath quickens, thoughts spiral. This can feel terrifying, especially for newcomers who worry they’re “losing control.”

It helps to remember that high cortisol during these moments is a biological alarm system, not your mind betraying you. Accepting the surge without fighting it often diminishes its power. When I guide people through these storms, I emphasize grounding strategies like feeling the texture of a blanket or focusing on the sound of music.

Another frequent challenge is dealing with the aftereffects of high cortisol during the session: fatigue, emotional sensitivity, or even irritability in the days following. Cortisol spikes can exhaust your body’s resources. If you’re not careful, you might mistake these feelings for negative “side effects” of the medicine, when actually they’re part of the body’s natural recovery process.

Here, gentle self-care becomes essential. Hydration, rest, and low-stress environments allow your HPA axis to settle. If emotional overwhelm persists, talking with a therapist familiar with psychedelic integration or a support group can be a lifeline. They offer a space to work through difficult feelings that might arise as cortisol normalizes.

Sometimes, people report feeling stuck with a high baseline cortisol even weeks after their session, accompanied by heightened anxiety or agitation. This can be a sign the session unearthed trauma or stress requiring deeper integration. Revisiting concepts from The Body Keeps the Score can illuminate ways to release stored tension held in the body, reducing chronic cortisol elevation.

Finally, avoid pushing yourself too hard to “process” everything right away. Cortisol surges remind us that healing is sometimes nonlinear, with ebbs and flows. Patience toward your nervous system’s rhythms is key to moving through challenging moments without shutting down.

6. Integration with Daily Life: Building Long-Term Cortisol Balance After Psychedelics

After the immediate effects of a psychedelic session fade, the real work begins: integration. One of the beautiful things about psychedelic therapy is its potential to reprogram how your body handles stress long-term. Cortisol isn’t just a momentary hormone; its regulation affects your daily mood, immune function, energy, and even aging.

Carhart-Harris and colleagues have noted in their research that psilocybin can “reset” the neural circuits involved in rumination and stress responses. Yet maintaining that reset depends on how you live your life post-session. This is where daily habits around stress management come in.

Mindfulness meditation is one of the best-known tools for reducing chronic cortisol levels. Even 10-15 minutes a day promotes calm and rewires the brain away from hypervigilance. Similarly, regular aerobic exercise has been shown to normalize cortisol rhythms and enhance resilience to stress.

Sleep hygiene cannot be overstated. Cortisol follows a circadian rhythm, typically peaking in the morning and dipping at night. Poor sleep disturbs this cycle, leading to persistent stress. Psychedelic experiences often increase sensitivity to good rest afterward, making it a perfect time to recommit to consistent sleep routines.

Social connection also plays a huge role. Feelings of belonging and safety reduce cortisol by calming the nervous system. Whether it’s sharing your journey in community, joining support groups, or simply spending time with loved ones, these interactions ground the changes initiated in your psychedelic session.

If you want to track your emotional and physiological shifts, keeping a journal is invaluable. I recommend a quality one like this Journaling Notebook Leather Bound. Writing about your experiences, mood, and body sensations can reveal patterns connected to stress and cortisol that you might otherwise overlook.

Ultimately, psychedelic therapy is a doorway, not a destination. You have to walk through it every day afterward. Making small, consistent lifestyle changes amplifies the session’s benefits, helping to maintain healthier cortisol levels and a more balanced inner life.

7. Closing Reflection: Cortisol as a Messenger, Not an Enemy

After all these years sitting with psychedelics and watching people encounter themselves deeply, I’ve come to see cortisol in a new light. It’s not just “the stress hormone” to fear or blame. Instead, it’s a messenger - a primal signal from our bodies telling us what we need to acknowledge or change.

In a psychedelic session, cortisol’s fluctuations mirror the intensity of the inner work. When it spikes, it might be saying, “Here is fear, here is tension, here is what you’ve been avoiding.” When it falls, it whispers, “You can relax now; the burden is shifting.” This dynamic dance invites us to listen rather than resist.

Sitting with that idea has changed how I approach both psychedelic therapy and everyday stress. Rather than trying to suppress cortisol or mentally battle my body’s reactions, I invite a compassionate curiosity. What story is my cortisol telling me right now? What old trauma or anxiety surfaces as a chemical wave in my blood?

Michael Pollan captures some of this beautifully in How to Change Your Mind, where he explores the intersection of psychedelics and healing not just as a fix but as a journey toward deeper self-awareness. Cortisol is part of that story, woven into the intimate conversation between mind, brain, and body.

So next time you prepare for a session or reflect on one past, consider cortisol not as a villain but as an old friend trying to keep you safe, even if clumsy or overzealous. Listening to that friend can open doors to gentler self-care, richer integration, and ultimately, a calmer, more grounded you.