The “KAP Nap”: What Happens When You Fall Asleep During Ketamine-Assisted Psychotherapy?

Falling asleep during a KAP session can feel confusing, or even disappointing.

“I think I missed the session.”

“Did I do it wrong?”

“Was the medicine wasted?”

There isn’t much research that looks specifically at this aspect of KAP. What follows is a synthesis of clinical experience and related research that helps frame why the “KAP Nap” may be more powerful than you think.

The Brain on Ketamine

Ketamine works differently than tradtional antidepressants. Rather than primarily targeting serotonin, it acts on glutamate systems through NMDA receptor antagonism. This leads to increased neuroplasticity and synaptic connectivity. It also appears to decrease activity in the Default Mode Network (DMN), which is associated with self-referential thinking and rumination (Ionescu et al., 2018).

In practice, this can look like:

• reduced internal narration

• dreamlike or symbolic experiences

• altered sense of self and time

• increased emotional or somatic access

• deep physiological relaxation

  
  

Therapeutic processing is not dependent on staying cognitively “online.” Emotional learning, memory reconsolidation, and nervous system shifts can continue beneath conscious awareness. The brain and body may still be actively processing, even when someone falls asleep (Brem et al., 2013).

From a Neuroexperiential Lens

Falling asleep during a KAP session may reflect processing that is occurring beyond conscious awareness within the deeper, subcortical systems that organize experience in the brain and body.

When someone falls asleep, it doesn’t mean the process has stopped. It may indicate a shift out of top-down cortical control and into bottom-up processing where the midbrain, limbic system, and autonomic nervous system are more directly engaged. From this perspective, the work continues even without narrative, language, or conscious tracking.

The Neuroexperiential Model suggests that much processing happens beneath conscious awareness, guided by our system’s own innate capacity to metabolize experience when provided with an attuned container (Grand, 2013).

The Uncertainty Principle further reminds us that the act of trying to define or pin down what is happening can pull us out of the experience itself. In this way, not knowing is an important part of the process. Even if the mind cannot fully make sense of it; the brain and body may still be actively reorganizing, integrating, and processing in ways that unfold over time.

Attachment + Polyvagal Lens

From an attachment and polyvagal lens, falling asleep in session may also be relational.

Our ability to rest develops through co-regulation and feeling safe enough (Porges, 2022). Sleep may have not been historically safe for some of us.

Within a supportive KAP container, we might find:

• the ability to soften while someone else remains present

• the absence of threat in closeness

• feeling cared for without needing to perform

• not having to stay on guard

  
  

Sometimes the most reparative experience is feeling safe enough to fall asleep in the presence of an other.

From A Parts Work Lens

Many of us have parts that are constantly “on.” Parts that anticipate needs, track everyone else’s emotions, manage, organize, and hold it all together. These parts are adaptive. They’ve been doing important, often thankless, work for a long time (Tomich Sorci, 2026).

But they also rarely get to rest. So when someone falls asleep during a KAP session, it may be a part experiencing (maybe for the first time) that it doesn’t have to keep working in that moment. A shift from constant monitoring to allowing.

And sometimes, from a parts perspective, sleep itself may be protective. If something feels too overwhelming, unfamiliar, or outside of current capacity; a part may gently move the system toward shutdown or rest as an act of care.

“I Felt Safe Enough to Fall Asleep”

Many clients come into KAP with nervous systems shaped by chronic vigilance: monitoring, anticipating, caregiving, performing. Rest is not always accessible in those states.

I have experienced clients falling asleep in KAP sessions, and have also experienced this myself. After some reflection and integration work, I often hear things like:

"I felt so safe and held".

“This is the only quiet time I have to myself.”

I truly feel honored when a client feels safe and secure enough to fall asleep in a session.

There is something deeply healing about being present with a nervous system that finally feels supported enough to let go in that way.

Not Every “KAP Nap” Means the Same Thing

Of course, sometimes sleep is just sleep. Sometimes the sleep comes out of sheer exhaustion. Sometimes the effects of the medicine is sedating. Maybe a client didn't sleep well the night before.

Regardless, we can trust that the brain is processing. Sometimes deep subcortical processing doesn't include grand insights or imagery. The brain and body know what they need, and sometimes that is some much needed rest.

References

Brem, A. K., Ran, K., & Pascual-Leone, A. (2013). Learning and memory. Handbook of clinical neurology, 116, 693–737.

David Grand. (2013). Brainspotting: The revolutionary new therapy for rapid and effective change. Sounds True.

Dore, J., Turnipseed, B., Dwyer, S., Turnipseed, A., Andries, J., Ascani, G., Monnette, C., Huidekoper, A., Strauss, N., & Wolfson, P. (2019). Ketamine-assisted psychotherapy (KAP): Patient demographics, clinical data and outcomes in three large practices administering ketamine with psychotherapy. Journal of Psychoactive Drugs, 51(2), 189–198.

Ionescu, Dawn F. MD; Felicione, Julia M. BA; Gosai, Aishwarya BA; Cusin, Cristina MD; Shin, Philip BS; Shapero, Benjamin G. PhD; Deckersbach, Thilo PhD. Ketamine-Associated Brain Changes: A Review of the Neuroimaging Literature. Harvard Review of Psychiatry 26(6):p 320-339, 11/12 2018.

Porges S. W. (2022). Polyvagal Theory: A Science of Safety. Frontiers in integrative neuroscience, 16, 871227.

Sorci, J. T. (2026). When good moms feel bad: An empowering guide for transforming guilt, anxiety and anger into compassion, confidence, and connectedness.