Ketamine Therapy for PTSD & Trauma in Tel Aviv

Ketamine is an NMDA receptor antagonist — a medication that has been used safely as an anesthetic for decades. Its potential psychiatric effects are thought to involve the glutamate system, which differs from the serotonin and norepinephrine systems targeted by most antidepressants.

Neuroplasticity

Current research suggests that ketamine may promote synaptic plasticity — the brain’s capacity to form new neural connections. However, the clinical significance of these findings for PTSD treatment specifically is still being investigated. Most of the evidence comes from preclinical (animal) studies, and the translation to human therapeutic outcomes is not yet fully understood.

Fear Extinction Learning

Some studies suggest ketamine may facilitate fear extinction learning — the process by which fearful associations are gradually reduced through safe re-exposure. This is relevant to PTSD because trauma-focused therapies work partly through fear extinction. However, this mechanism is not yet well-established in humans, and the evidence is preliminary.

Default Mode Network

Neuroimaging studies have observed changes in default mode network activity during ketamine administration. The default mode network is involved in self-referential thinking and rumination — processes often affected in PTSD. The interpretation of these changes and their relationship to therapeutic outcomes remains an area of active investigation.

Memory Reconsolidation

The concept of memory reconsolidation — whereby previously formed memories become modifiable when recalled — is a theoretical framework that some clinicians apply to ketamine-assisted therapy. The idea is that ketamine may create a window during which traumatic memories, when brought to mind in a therapeutic context, can be re-processed. This model is not yet empirically validated as a mechanism of KAP’s therapeutic effect and should be understood as a hypothesis, not an established fact.

Perhaps the most important principle in trauma treatment is this: ketamine is not a replacement for trauma therapy. Psychotherapy is central to PTSD treatment — not merely an adjunct to the medication component. Ketamine, when used, is a tool within a therapeutic framework, not a substitute for the difficult, necessary work of processing traumatic experiences.

Before any trauma-focused work — with or without ketamine — certain foundations need to be in place:

• Grounding and self-regulation skills — the ability to manage distress and return to a sense of safety when symptoms intensify.
• Affect regulation — capacity to tolerate difficult emotions without becoming overwhelmed or shutting down.
• Safety — current life circumstances that provide enough stability to engage in therapeutic work.
• Consent capacity — the ability to provide informed consent and engage actively in the treatment process.

Patients with complex PTSD or developmental trauma often need extended stabilization work before any trauma processing is appropriate. This is not a delay for its own sake — it is clinically necessary. Attempting to process traumatic material before these foundations are in place can be destabilizing rather than helpful.

Dissociation and Careful Assessment

Many trauma survivors experience dissociation — a disconnection from thoughts, feelings, memories, or sense of identity. Dissociation exists on a spectrum, from common experiences like “highway hypnosis” to more severe forms such as depersonalization or dissociative amnesia.

Dissociation requires careful assessment before considering KAP, for several reasons:

• •Ketamine itself produces a dissociative state. For patients with significant dissociative symptoms, the experience may be distressing or clinically complex rather than therapeutic.
• •Severe dissociation may indicate that further stabilization is needed before any ketamine-assisted work.
• •Dissociative symptoms can be mistaken for other conditions. A thorough evaluation helps clarify the clinical picture.

This is why a full psychiatric evaluation — not just a screening call — is required before any treatment recommendation. The evaluation assesses dissociation, stabilization adequacy, and whether KAP is appropriate at this time.

Candidacy for KAP in PTSD is assessed individually, and it differs from candidacy for depression. Factors that are considered include:

• PTSD that has not responded adequately to first-line treatments (trauma-focused therapy and/or medication trials)
• Adequate stabilization — grounding skills, affect regulation, and current life safety
• Absence of contraindications (active unstable substance use, untreated psychosis, severe untreated dissociation)
• Willingness to engage in ongoing trauma-focused psychotherapy as part of the treatment
• Capacity to provide informed consent and participate actively in the process

For a broader discussion of candidacy — including conditions that require careful evaluation — see our full candidacy guide.

Realistic Expectations

It is important to be honest about what KAP can and cannot do for PTSD:

• •Response is not guaranteed. Some patients experience meaningful symptom reduction; others do not respond. There is no way to predict in advance who will benefit.
• •Multiple sessions may be needed. A single session is rarely sufficient. The number is individualized based on response.
• •Effects may require maintenance. The duration of benefit is not well-established. Ongoing psychotherapy and, in some cases, follow-up sessions may be needed.
• •KAP is not a cure. It is one tool within a broader treatment plan. Trauma recovery is a process, not a single intervention.