Ketamine Therapy for PTSD: What the Evidence Says

3 min read·Updated August 2026

This guide is general information, not medical advice. Ketamine therapy isn't right for everyone — talk to a licensed clinician about your specific situation.

Ketamine earned its reputation in treatment-resistant depression, but many clinics now advertise it for post-traumatic stress disorder as well. If you're considering it for PTSD, it's worth understanding that the evidence base is real but noticeably thinner and more mixed than for depression — and a good clinic will tell you that upfront.

Where the research stands

Ketamine for PTSD is off-label: it's not FDA-approved for this use, and neither is Spravato. What the studies show:

A 2014 randomized trial (Feder and colleagues, Mount Sinai) found a single ketamine infusion reduced PTSD symptoms more than an active control (midazolam) at 24 hours.
A 2021 follow-up trial from the same group found that a series of six infusions over two weeks reduced symptoms significantly in individuals with chronic PTSD, with effects lasting a median of about four weeks after the final infusion.
A 2022 trial in veterans and active-duty service members, however, found no significant difference between ketamine and placebo on the primary PTSD outcome — a genuinely disappointing result in the population most people associate with PTSD treatment.

The fair summary: ketamine can produce rapid, meaningful relief for some people with PTSD, effects tend to fade within weeks without maintenance or accompanying therapy, and results in military-related PTSD have been weaker than in civilian populations.

Why pairing it with therapy matters more here

For depression, ketamine is often used as a standalone biological treatment. For PTSD, many clinicians believe the window matters more than the drug: in the days after a ketamine session, the brain appears more capable of forming new associations (enhanced neuroplasticity). Several treatment models use that window deliberately — scheduling trauma-focused psychotherapy such as prolonged exposure or EMDR in the days following infusions.

When you evaluate clinics, ask directly: "Do you coordinate with a trauma therapist, or provide integration therapy?" A clinic that treats PTSD exactly like depression — infusions only, no therapy component — is leaving a lot of potential benefit on the table. Our guide on choosing a ketamine clinic covers more screening questions.

What treatment typically looks like

Protocols vary, but a common structure mirrors depression treatment:

An initial series of about six IV infusions over two to three weeks, dosed around 0.5 mg/kg over 40 minutes (see IV vs. IM ketamine for route differences)
Symptom tracking using a standard scale such as the PCL-5
Maintenance sessions as needed, often every few weeks to months
Ideally, trauma-focused therapy scheduled alongside

One honest caution: dissociation — the dreamlike, detached state ketamine produces — can be unsettling for people with trauma histories, and occasionally distressing. Experienced clinics screen for this, keep early doses conservative, and have staff present who know how to ground a patient during a difficult experience. This is a fair question to ask before booking: "What happens if I have a distressing experience mid-session?"

Cost and insurance

Because PTSD treatment with ketamine is off-label, insurance essentially never covers the drug — and unlike depression, there's no FDA-approved Spravato pathway for PTSD. Expect cash-pay pricing similar to depression protocols; our cost guide and insurance guide explain typical numbers and ways to reduce out-of-pocket costs.

Is it worth trying?

Reasonable candidates tend to be people who have already tried first-line PTSD treatments — trauma-focused psychotherapy and standard medications like sertraline or paroxetine — without adequate relief. Ketamine is not a first-line treatment for PTSD, and any clinic that positions it that way should raise an eyebrow.

If you do pursue it, go in with calibrated expectations: relief, when it comes, is often fast but temporary, and the best results in practice seem to come from combining ketamine with real trauma therapy rather than replacing it.

You can browse clinics near you in our directory — clinic pages list contact information so you can ask about PTSD-specific experience before committing to anything.