What Ketamine Infusion Therapy Can Do for Long-Standing Trauma

Can Ketamine Infusion Help With Long-Standing Trauma?

IV ketamine may reduce PTSD symptoms within a day for some people whose symptoms have not improved with other care. It is not an FDA-approved treatment for PTSD. Relief can fade, so trauma-focused therapy and follow-up care still matter.

Research suggests ketamine therapy may help the brain form new connections. That could make it easier to work through trauma in therapy, but the evidence is still growing and results vary.

I’m Dr. Dee Bonney, MD, an emergency medicine-trained physician with over 22 years of experience. I oversee ketamine infusion for trauma-related PTSD at AlphaOmega Wellness in Greenwood, Indiana, and I’ll walk you through the evidence, risks, and treatment process.

Understanding Chronic Trauma and Treatment Resistance

Living with trauma can feel like an alarm that never shuts off. After a frightening or life-threatening experience, the brain shifts into high alert to keep you safe. For many people, that alarm settles down over time. For some, it doesn’t, and that’s when post-traumatic stress disorder (PTSD) can develop. With PTSD, everyday sights, sounds or thoughts can bring back intense fear and strong physical reactions, as if the danger were happening again. When trauma is repeated or long-lasting, such as ongoing abuse, some people develop what’s called complex PTSD, which can also affect emotions, relationships and how they see themselves.

Standard medications, such as selective serotonin reuptake inhibitors (SSRIs), help many people manage these distress signals. However, they do not work for everyone. Traditional antidepressants primarily target monoamine neurotransmitters like serotonin and norepinephrine. These medications often require four to eight weeks to show effects, and a large number of patients experience persistent symptoms despite trying multiple prescriptions.

When conventional treatments fail to provide relief, it is often referred to as treatment resistance. Chronic trauma alters fear neurocircuitry in the brain. The amygdala, which acts as the brain’s threat detector, becomes overactive. At the same time, areas of the prefrontal cortex and hippocampus, which help process context and calm fear responses, show reduced functional connectivity.

Trauma physically changes the way neural circuits communicate. For individuals who have spent years trying standard therapies without adequate progress, finding new clinical pathways to support brain health is essential.

How Ketamine Infusion for Trauma Works in the Brain

Ketamine works through entirely different biological pathways than conventional antidepressants. While traditional psychiatric medications adjust serotonin or norepinephrine levels over weeks, ketamine targets the brain’s primary excitatory neurotransmitter system: glutamate.

At sub-anesthetic doses, ketamine acts as an N-methyl-D-aspartate (NMDA) receptor antagonist. By blocking NMDA receptors on specific inhibitory interneurons, it triggers a surge of glutamate release. This surge stimulates alpha-amino-3-hydroxy-5-methyl-4-isoxazolepropionic acid (AMPA) receptors.

Research suggests this AMPA activation turns on signaling cascades that release Brain-Derived Neurotrophic Factor (BDNF). BDNF acts like fertilizer for the brain, promoting synaptogenesis, which is the growth of new synaptic connections between neurons (Reede et al., 2023). For a detailed scientific overview of its pharmacology and clinical use, see Ketamine in Trauma: A Literature Review and Administration Guidelines.

By encouraging new synaptic connections, ketamine helps restore communication between the prefrontal cortex and the amygdala. This can help turn down hyperactive threat responses and support healthier emotional regulation.

Feature	Standard Antidepressants (SSRIs/SNRIs)	IV Ketamine Infusion
Primary Target	Serotonin and Norepinephrine reuptake	Glutamate / NMDA receptor antagonism
Onset of Action	4 to 8 weeks	24 hours to several days
Impact on Synapses	Gradual downstream receptor adaptation	Rapid BDNF release and synaptogenesis
Administration	Daily oral medication	Controlled clinical IV protocol
Trauma Circuit Action	Modulates mood chemistry gradually	Helps restore prefrontal-amygdala connectivity

Neuroplasticity and Memory Reconsolidation During Infusions

When a traumatic memory is recalled, it briefly becomes flexible and open to updating before it settles back into long-term storage. Researchers call this the memory reconsolidation window.

During this window, the emotional charge attached to a memory may soften. Researchers are studying whether ketamine, which supports the brain’s ability to form new connections, may make this window more effective. Early research suggests it may support fear extinction, the brain’s process of learning that a reminder is no longer dangerous. The hope is that this helps people work through traumatic memories in therapy without being overwhelmed by the original emotional charge.

Clinical Protocols for Ketamine Infusion for Trauma

In a clinical setting, ketamine is administered at low, sub-anesthetic doses, typically around 0.5 mg/kg delivered over 40 minutes.

Dosing is weight-based, adjusted before each infusion based on response, following ASKP3 published guidelines. Before treatment begins, patients undergo a thorough baseline assessment to confirm suitability. Many clinical protocols use an initial series, such as a six-infusion program delivered over two to three weeks, to build cumulative benefits and provide a stable window for therapeutic work.

Clinical Evidence and Benefits for PTSD and Trauma Recovery

Over the last decade, clinical trials have documented the rapid effects of ketamine on severe trauma symptoms. In a clinical trial of 30 participants with severe PTSD, an intravenous dose of 0.5 mg/kg significantly reduced scores on the Clinician-Administered PTSD Scale (CAPS-5) and Montgomery-Åsberg Depression Rating Scale (MADRS) within 24 hours compared to an active control.

A comprehensive meta-analysis of 10 studies evaluating ketamine for PTSD demonstrated statistically significant reductions in PTSD Checklist for DSM-5 (PCL-5) scores at the end of the treatment course (standardized effect size = 0.25; p = 0.0363) (Almeida et al., 2024). In these studies, patients receiving ketamine experienced a mean score improvement of 30.85 points compared to 22.06 points in control groups.

Key clinical outcomes from trauma research include:

• A single intravenous infusion of ketamine (0.5 mg/kg) significantly reduced PTSD symptoms within 24 hours compared to midazolam, with improvements in overall clinical presentation and no lasting dissociative effects.
• In a study of 41 military veterans with PTSD and chronic pain, a single dose showed significant symptom reduction on the Impact of Event Scale-Revised (IES-R) at 24 hours and 7 days.
• In a series of 15 participants with comorbid PTSD and treatment-resistant symptoms, completing six infusions led to marked CAPS-5 score reductions.
• Research has also demonstrated that ketamine can produce rapid reductions in suicidal thoughts within hours of administration.

If you or someone you know is struggling or in crisis, help is available. Call or text 988 to reach the Suicide & Crisis Lifeline. Ketamine infusion is a structured clinical protocol and is not intended for emergency crisis care.

Integrating Support with Ketamine Infusion for Trauma

While ketamine can open a biological window of neuroplasticity, it does not do the emotional work alone. Combining medical infusions with structured integration and psychotherapy creates an enhanced therapeutic window.

In a study of 20 patients with refractory PTSD, trauma-focused psychotherapy augmented with ketamine produced better response rates and more durable therapeutic outcomes than psychotherapy with a placebo. Learning integration practices allows individuals to take the mental clarity gained during an infusion and apply it to daily coping tools, grounding exercises, and ongoing talk therapy.

Chronic PTSD Management and Trauma Recovery

It is important to distinguish between acute trauma interventions and chronic PTSD management. Research looking at perioperative ketamine administered immediately following physical injury shows mixed results. For example, in a study of 241 soldiers with burn injuries, those who received perioperative ketamine had a lower PTSD incidence rate (27%) than those who did not (46%). However, administering ketamine immediately post-injury in high-stress emergency environments can sometimes heighten acute dissociation (Reede et al., 2023).

For chronic PTSD, ketamine is used differently. It is administered in a calm, structured medical environment long after the original event, specifically targeting established, treatment-resistant neural loops.

Candidate Eligibility, Safety, and What to Expect During Treatment

Ketamine therapy is suitable for adults diagnosed with chronic PTSD, severe anxiety, or treatment-resistant depression who have not achieved adequate relief from standard care.

Because ketamine is a Schedule III controlled substance with cardiovascular effects, a comprehensive medical screening is required. Contraindications and exclusion criteria include:

• Uncontrolled hypertension or unstable cardiovascular disease
• History of active psychosis, schizophrenia, or mania
• Severe liver dysfunction
• Current pregnancy
• Active, untreated substance use disorder

During your initial medical evaluation, your provider and the clinical team review your medical history and current prescriptions to confirm if ketamine is safe for you.

Preparation and the Infusion Experience

General preparation and recovery guidance for ketamine infusions may include the following. Follow your provider and clinical team’s instructions:

1. Fasting: Patients must follow pre-infusion guidelines, typically avoiding solid food for at least 4 to 6 hours and clear liquids for 2 hours prior to the session to prevent nausea.
2. Transportation: Because ketamine causes temporary dissociation and altered reflexes, you cannot drive home. Follow your clinical team’s transportation instructions.
3. The Session: You will sit in a quiet, comfortable chair. A licensed clinician is on site for every infusion. Blood pressure is checked before the infusion begins, while heart rate and oxygen level are continuously monitored during the infusion.
4. Sensations: During the 40-minute infusion, patients often experience mild dissociative sensations, such as feeling light, floating, or watching thoughts from a calm distance. The environment is kept quiet, and many choose to wear an eye mask and listen to calming instrumental music.
5. Recovery: Once the infusion ends, the dissociative effects wear off within 15 to 30 minutes. You rest while your clinical team checks that your vital signs return to baseline.

Managing Side Effects and Long-Term Considerations

Ketamine’s side effects are generally mild and resolve shortly after the infusion finishes. Common short-term side effects include:

• Transient dissociation or feelings of unreality
• Mild nausea or dizziness
• Temporary, modest elevations in blood pressure and heart rate
• Blurred vision or lightheadedness

When administered in low doses under medical supervision, the risk of physical dependency is very low. Dosing schedules are carefully managed to avoid tolerance, and regular check-ins ensure that benefits are maintained safely over time.

Frequently Asked Questions about Ketamine Infusion for Trauma

How quickly does ketamine relieve trauma and PTSD symptoms?

Many patients notice initial reductions in intrusive thoughts, hyperarousal, or emotional heaviness within 24 hours of their first or second infusion. However, maximum benefits are usually cumulative, building across a completed series of infusions.

Is ketamine infusion therapy FDA-approved for trauma?

Ketamine is FDA-approved as an anesthetic since 1970. Its use for psychiatric conditions, including PTSD, anxiety, and depression, is an off-label application supported by extensive clinical research and physician-led protocols.

What should patients do to prepare before their infusion appointment?

Patients should follow all pre-infusion fasting instructions, wear loose and comfortable clothing, avoid taking contraindicated medications as directed by their prescriber, and follow their clinical team’s transportation instructions and not drive after treatment.

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Finding Hope in Trauma Recovery

Long-standing trauma can narrow your world, making ordinary moments feel exhausting. While ketamine is not an instant solution, it provides a valuable clinical tool to interrupt chronic fear pathways and support biological neuroplasticity.

At AlphaOmega Wellness, we have completed more than 5,000 IV ketamine infusions since 2022. Serving our community in Greenwood since 2018, we offer physician-led IV ketamine therapy delivered through an emergency-medicine-directed protocol. A licensed clinician is on site for every infusion. Blood pressure is checked before the infusion begins, while heart rate and oxygen level are continuously monitored during the infusion. Continuous blood-pressure monitoring is intrusive and unnecessary, so it is not used.

If you are ready to learn whether an individualized treatment protocol is right for your brain health, we invite you to take the next step. Contact us to schedule a free consult of about 30 minutes with a Brain Health Specialist. Ask us about our guarantee at the consult.

Dr. Dee Bonney, MD

Reference List

Almeida TM, Lacerda da Silva UR, Pires JP, Borges IN, Martins CRM, Cordeiro Q, Uchida RR. “Effectiveness of Ketamine for the Treatment of Post-Traumatic Stress Disorder – A Systematic Review and Meta-Analysis..” Clinical neuropsychiatry, 2024. PMCID PMC10979792. Reede K, Bartholomew R, Nielsen D, Ahmeti M, Zreik K. “Ketamine in Trauma: A Literature Review and Administration Guidelines..” Cureus, 2023. PMCID PMC10620013. Clément Le Cornec, Marion Le Pottier, Hélène Broch, Alexandre Marguinaud Tixier, Emmanuel Rousseau, Said Laribi, Charles Janière, Vivien Brenckmann, Anne Guillerm, Florence Deciron, Amine Kabbaj, Joël Jenvrin, Morgane Péré, Emmanuel Montassier. “Ketamine Compared With Morphine for Out-of-Hospital Analgesia for Patients With Traumatic Pain.” JAMA Network Open, 2024. DOI 10.1001/jamanetworkopen.2023.52844. James M. Klugh, Thaddeus J. Puzio, Michael W. Wandling, Chelsea J. Guy-Frank, Charles Green, Paulina B. Sergot, Samuel J. Prater, Julius Balogh, Christopher T. Stephens, Charles E. Wade, Lillian S. Kao, John A. Harvin. “Ketamine for acute pain after trauma: A pragmatic, randomized clinical trial.” Journal of Trauma and Acute Care Surgery, 2024. DOI 10.1097/ta.0000000000004325.