When EMDR and Ketamine Work Together — What the Research Is Showing

Two of the most effective tools for trauma processing are EMDR and ketamine-assisted psychotherapy. Used separately, both have strong evidence behind them. Used together, something more interesting happens, and now the research is starting to catch up to what therapists have been observing for years.

What Each Approach Does on Its Own

EMDR therapy helps the brain reprocess traumatic memories through bilateral stimulation — alternating left-right input that activates the brain's natural memory reconsolidation mechanism. It works by helping stuck experiences move out of the survival brain and into a part of the nervous system that can hold them with more distance and less charge.

Ketamine-assisted psychotherapy works differently. Ketamine operates through the glutamate system, rapidly promoting neuroplasticity — the brain's capacity to form new neural connections and update old patterns. It also temporarily quiets the default mode network, the part of the brain responsible for rumination, self-criticism, and the rigid loops that make trauma feel inescapable.

Each is powerful on its own. But they target different mechanisms — and that's exactly why the combination is generating interest.

What Happens When You Combine Them

The emerging clinical picture is that ketamine creates the neurobiological conditions that make EMDR more effective — and EMDR gives direction and structure to the window ketamine opens.

In a 2024 pilot study, Ketamine Assisted EMDR Therapy led to a statistically and clinically significant reduction in PTSD symptoms and functional impairment. Clients reported being able to process traumatic memories with less fear, in a more relaxed and peaceful state, and felt more connected to their emotions with less resistance to difficult material.

Ketamine's ability to temporarily reduce fear responses and enhance neuroplasticity may allow clients to engage with traumatic memories in a way that feels less overwhelming — reducing the distress that can make EMDR's reprocessing phases difficult to tolerate.

Ketamine also appears to decrease activity in the default mode network — the part of the brain responsible for persistent self-referential thinking and rumination. For clients who get stuck in loops of self-blame or hypervigilance, this quieting effect can create a more receptive state for trauma processing.

In practical terms: the ketamine softens the grip of the fear response and opens the brain's capacity for change. The EMDR then works within that window to help the nervous system complete what it's been holding — updating memories, releasing stuck patterns, and building new neural pathways that support a different relationship with the past.

How This Can Work in Practice

The combination can happen in two ways depending on dose and session structure.

In the same session — low-dose sublingual ketamine is administered at the start of the session, and EMDR processing begins as the ketamine takes effect. The client remains aware and present throughout. The bilateral stimulation happens within the opened neuroplasticity window, often allowing deeper processing with significantly less distress than standard EMDR.

Sequentially — a ketamine session is followed by an EMDR session in a separate appointment. The neuroplasticity window ketamine creates can last for days after the medicine session, meaning EMDR done in the days following KAP can benefit from enhanced receptivity even without the medicine present in the session itself.

Both approaches are valid. The right structure depends on what the client needs, their tolerance for the medicine, and the clinical judgment of the prescribing provider and therapist working together.

Who This Is For

This combination tends to be particularly valuable for people who have tried EMDR or other trauma therapies and feel like progress has stalled. Where the distress around certain memories is high enough that fully engaging with the reprocessing feels too activating. Where treatment-resistant depression or anxiety is running alongside the trauma, making other approaches less effective.

The research is honest about its current limits — most existing studies are small and lack the randomized controlled trial design that represents the gold standard. But the early findings are consistent, and the theoretical rationale is strong. Clinically, what therapists and clients are reporting mirrors what the research is beginning to show: the combination reaches places that neither approach reaches alone.

As a somatic therapist and EMDR therapist based in Carmel-by-the-Sea, I offer KAP in collaboration with a licensed prescribing psychiatric nurse practitioner, working with women in Carmel, Monterey, and throughout California virtually.

Book a consultation here to talk through whether this combination might be right for you.

References

Topel, M., & Ciccone, D. (2025). Ketamine Assisted EMDR Therapy™ for PTSD: Investigating the synergistic effects of pharmacotherapy and psychotherapy. European Journal of Psychotraumatology. https://doi.org/10.1080/20008066.2025.2572861

Topel, M., & Ciccone, D. (2024). Pilot study on Ketamine Assisted EMDR Therapy™. Ketamine Assisted EMDR Therapy™ Institute, Thousand Oaks, CA.

Dore, J., et al. (2019). Ketamine assisted psychotherapy: A preliminary investigation of a novel approach to treatment-resistant depression. Journal of Affective Disorders.

Feder, A., et al. (2021). Randomized, double-blind, placebo-controlled trial of ketamine in PTSD. Molecular Psychiatry.

Duman, R.S., & Aghajanian, G.K. (2012). Synaptic dysfunction in depression: Potential therapeutic targets. Science, 338(6103), 68–72.

Wilkinson, S.T., et al. (2018). The effect of a single dose of intravenous ketamine on suicidal ideation. Journal of Psychiatric Research.

This blog is for educational purposes only and is not a substitute for professional medical or psychological advice, diagnosis, or treatment. Ketamine is a controlled substance requiring a medical evaluation and prescription. Ashley K. Whelan is a Licensed Professional Clinical Counselor (LPCC #11188) in California specializing in EMDR, somatic therapy, and ketamine-assisted psychotherapy. Telehealth available throughout California and Idaho.