Ketamine-Assisted Psychotherapy —
Transformational Healing
A boutique ketamine therapy center offering in-person Ketamine-Assisted
Psychotherapy for adults and couples struggling with depression,
anxiety, trauma, and substance use.
✦ In-person sessions only — no Zoom
✦ Led by a California Licensed Psychotherapist
✦ Deep focus on preparation & post-integration

Your Healing Journey Begins Here
Evidence-based ketamine therapy paired with licensed psychotherapy for lasting transformation.
3
Phase Process
1:1
Personal Care
CA
Licensed
100%
Confidential
Our Difference
Why Marin Ketamine Therapy Center?
We combine clinical excellence with grounded, nature-inspired care — because
transformation requires both safety and depth.
🌿
In-Person Therapy Only
Every session happens face-to-face in a calm, safe environment. No video calls — real human presence matters.
◎
Ketamine Troches
We use sublingual lozenges — a gentle, precise route of administration that supports deep internal work.
⟳
Deep Preparation & Integration
The medicine session is just one part. We invest heavily in preparing you and integrating insights afterward.
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Boutique, Grounded Care
A small practice means you receive personal, unhurried attention at every stage of your journey.
What is KAP?
Ketamine-Assisted Psychotherapy
Ketamine-Assisted Psychotherapy (KAP) combines carefully guided ketamine sessions with psychotherapy to support deep emotional healing and lasting change. It is not simply a medication — it is a therapeutic journey.
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Neuroplasticity Window
Ketamine creates a brief period of enhanced brain plasticity, making psychotherapy more effective.
💚
Rapid Relief
Many clients notice shifts in mood and perspective within the first few sessions.
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Lasting Integration
Post-session integration therapy turns insight into lasting, meaningful change.
Who We Serve
Who We Help
We work with adults and couples navigating some of life’s most difficult terrain.
Depression & Anxiety
Trauma & PTSD
Substance Use & Relapse
Couples Seeking Healing
Our Process
The Healing Journey
Every journey is guided with care, intention, and clinical expertise at each stage.
1
Preparation Therapy
Building trust, setting intentions, and establishing a safe therapeutic relationship before the medicine session.
2
Medicine Session
In-person ketamine session with continuous therapeutic presence throughout the experience.
3
Post-Integration Therapy
Processing insights, anchoring shifts, and translating the experience into lasting life change.
Meet Your Therapist
A Familiar Face Before You Begin
Before your first consultation, we invite you to watch this short introduction. Learn about our background, our therapeutic philosophy, and what to expect.
Introduction & Therapeutic Philosophy
~ 4 minutes
Testimonials
What Clients & Colleagues Say
Shared with permission — every story is a reminder that transformation is possible.
"
After battling severe depression and anxiety for over a decade, I felt like I had tried everything. I was trapped in a cycle of switching anti-depressants, dealing with side effects, and never really finding relief—they just never worked for me. I decided to try Ketamine Therapy and Thom Kessler was recommended to me. Thom Kessler
Thom’s unique approach to KAP changed the trajectory of my life. He doesn’t just administer ketamine he guides you through a deeply transformative therapeutic process. For the first time in years, the heavy cloud of anxiety and depression has lifted. Thom provided the safe space and brilliant integration work I needed to finally heal. I am incredibly grateful for his care.”
K.W.
"
Working with Thom Kessler has been a truly transformative experience. I was initially hesitant about trying Ketamine, but Thom’s unique, deeply intentional approach made all the difference. He doesn’t just facilitate the sessions; he creates an incredibly safe, grounded space that allowed me to fully explore and process things I’ve felt stuck on for years. His integration work is where his expertise as a psychotherapist really shines. If you are looking for a practitioner who balances clinical mastery with genuine heart and a distinct therapeutic perspective, I cannot recommend Thom highly enough.”
R.D.
"
Thom brings a truly refreshing and unique approach to Ketamine Psychotherapy. From our very first consultation, it was clear that his methodology goes way beyond standard treatment models. He treats the whole person, tailoring the preparation and integration phases perfectly to my needs. Thanks to his guidance, I’ve experienced profound breakthroughs in my mental health that standard therapy couldn’t reach. Thom is a deeply trusted professional, and his private practice is a sanctuary for real healing.”
S.S.
"
If you are considering Ketamine Assisted Psychotherapy, Thom Kessler is the practitioner to see. His approach to KAP is entirely unique, thoughtful, and highly effective. He provides excellent care, insightful integration sessions, and a supportive environment from start to finish. A phenomenal therapist who is truly dedicated to his patients’ healing journeys.”
B.M
"
I cannot recommend Thom Kessler enough, especially for anyone who feels hopeless after years of treatment-resistant depression and anxiety. Anti-depressants never really worked for me, leaving me feeling stuck and exhausted. Thom’s unique approach to Ketamine Therapy offered a completely different path. His methodology goes far beyond traditional clinical settings. Through his attentive preparation and deep integration therapy, I experienced a level of relief from my anxiety and depression that I didn’t think was possible. He is an exceptional therapist who truly understands how to facilitate deep healing.”
M.H
"
“If you’ve struggled for years with depression and anxiety and found that standard anti-depressants just don’t work for you, please see Thom Kessler. His unique approach to Ketamine Assisted Psychotherapy gave me my life back. Thom provides an incredibly supportive, safe environment, and his expertise as a psychotherapist made all the difference in my recovery. Truly life-changing care.”
A.W
blogs
Latest Insights
Understanding why ketamine often works when traditional antidepressants and therapy have fallen short.
Five practical ways to anchor the insights from your medicine session into your daily routine and long-term habits.
How Ketamine-Assisted Psychotherapy opens a unique physiological window for mental health breakthroughs.
Frequently Asked Questions
Everything You Need to Know
Find answers to the most common questions about our services, process, pricing, and support.
If you can’t find the information you’re looking for, feel free to get in touch with us.
Who Is Suitable For Ketamine Treatment?
Studies show that Ketamine can be effective in treating mental health conditions such as depression, anxiety, addiction, OCD, chronic pain, and PTSD. Some people also seek KAP for deeper psychological and existential exploration. Others turn to KAP when feeling “stuck” and seeking direction, when navigating life transitions, when processing grief and loss, or simply to gain a broader perspective on life.
What Does Ketamine Feel Like?
Ketamine produces a relaxing, floating, dissociative effect that many describe as being “out of” their body. Many experience shifts in perception of both inner and outer worlds that often feel expansive in nature. People’s experiences range from a restful, sleepy feeling to a full-blown mystical experience. A minority may not have any conscious response to Ketamine at all – and while this can feel disappointing, it is often just as therapeutically rich and important as the “bigger” experience one was perhaps hoping to have.
Under the influence of Ketamine, people commonly experience reduced control over motor functions such as speaking or walking. These phenomena are often experienced with relief or amusement. You’ll be lying down in a comfortable position during the experience.
While you may be accessing deep and painful psychological material while on your journey, Ketamine is an “anxiolytic,” meaning it reduces anxiety and keeps you feeling calm and relaxed. In this regard, Ketamine can allow safe and supportive access to parts of oneself that may feel too painful or too scary in the context of regular talk therapy.
What Are The Risks And Side Effects Of Ketamine?
Ketamine is regarded as extremely safe with minimal risks of cardiac issues or respiratory depression and is widely used as an anesthetic agent in medical practice, both in the US and around the world. However, as with any medication, there are also potential risks and side effects to consider. These include nausea and elevated heart rate or blood pressure. These are typically mild and transient, wearing off within a few hours following treatment. You will be carefully screened for underlying medical concerns prior to taking Ketamine to ensure you are a good fit for this treatment. Patients must have a pre-arranged transportation from our office as driving is not allowed on the day of the dosing session.
What If I Have A “Bad Trip”
We encourage our patients to take a nonjudgmental stance towards everything that might arise in a KAP session. Ketamine therapy can open a wide variety of doors during a session, including ones that are pleasurable and sometimes ones that are a bit disturbing. We have found that “challenging” experiences can be extremely therapeutically valuable and ultimately catalyze important breakthroughs that may lead to significant improvements in perspective, mindset, and relationships. Regardless of whether you saw your medicine session as “good” or “bad,” we work with you to utilize your experiences to facilitate insight, awareness, and growth.
Begin Today
Take the First Step Toward Healing
A free, private 20-minute consultation to see if KAP is right for you.