If you’ve been searching for IV ketamine therapy for PTSD in Manhattan because nothing else has worked, this guide is for you. Living with post-traumatic stress disorder (PTSD) when the usual treatments haven’t helped can feel isolating. You may have worked through therapy, tried more than one medication, and still find yourself carrying the same heavy symptoms. You’re not looking for a miracle. You’re looking for an option grounded in evidence, delivered with care.
This guide explains what intravenous (IV) ketamine therapy for PTSD involves, what the research suggests, and how a thoughtful, medically supervised approach works. Our aim is to help you make an informed decision, not to make promises.
When “treatment-resistant” describes your experience
Treatment-resistant PTSD is a practical description, not a verdict. It means first-line treatments have not brought the relief you hoped for, even after a fair trial.
The standard first step for PTSD often includes trauma-focused therapy and antidepressants, usually selective serotonin reuptake inhibitors (SSRIs). These help many people. But they don’t help everyone. Across the research literature, SSRI response rates for PTSD rarely exceed 60%, and fewer than 30% of people reach full remission. That leaves a large group still living with intrusive memories, hypervigilance, and disrupted sleep.
If that’s you, it doesn’t mean you’ve failed treatment or that nothing will work. It often means a different mechanism is worth exploring.
How IV ketamine works differently
Most antidepressants act on serotonin, norepinephrine, or dopamine, and they can take weeks to build up. Ketamine works through a different pathway.
Ketamine is an N-methyl-D-aspartate (NMDA) receptor antagonist, which means it blocks a specific glutamate receptor in the brain. This action is thought to support neuroplasticity — the brain’s ability to form new connections and adjust patterns that have become rigid. For someone whose nervous system has been shaped by trauma, that flexibility may create an opening for change.
IV ketamine is ketamine delivered through a vein, drop by drop, so the dose can be adjusted in real time. This precision is one reason many clinicians favor it over at-home or intranasal options, which can be harder to control and monitor.
During a session, some people notice dissociation — a temporary sense of distance from their usual thoughts, body, or surroundings. This is expected, time-limited, and monitored throughout.
What the research suggests
The evidence for ketamine in PTSD is still emerging, but it’s encouraging — especially when the medicine is paired with the right environment and support.
A 2021 randomized controlled trial from the Icahn School of Medicine at Mount Sinai, published in the American Journal of Psychiatry, studied repeated IV ketamine infusions for chronic PTSD. Mount Sinai reported that 67% of the ketamine group achieved at least a 30% reduction in symptoms at two weeks, compared with 20% of those who received midazolam (an active comparison), and improvement was often seen within 24 hours of the first infusion.
More recent work looks at what happens when ketamine is given inside a supportive, psychedelic-style framework. A 2025 study, “Rapid and sustained reduction of treatment-resistant PTSD symptoms after intravenous ketamine in a real-world, psychedelic paradigm,” by Henry A. MacConnel, Mitch Earleywine, and Steven Radowitz, published in the Journal of Psychopharmacology, followed 117 outpatients with treatment-resistant PTSD.1,2,3
Each person received at least six IV ketamine administrations alongside preparation, intention-setting, and integration sessions, with eye shades and evocative music. According to reporting on the study, average PTSD Checklist for DSM-5 (PCL-5) scores fell from 52.54 at baseline to 28.78, 75% of participants showed clinically meaningful improvement, and 62% reached remission.
These are real-world findings without a control group, so they should be read with appropriate caution. Still, they point to something Nushama has long believed: the setting around the medicine may matter as much as the medicine itself.
Why the setting matters as much as the medicine
Ketamine is a catalyst, not a cure-all. What you do before and after a session helps determine whether early relief becomes lasting change.
Preparation helps you set intentions and feel ready for the experience. Integration is the process of making sense of what came up during a session and translating those insights into daily life, often with a therapist or trained integration guide.
That’s also why set and setting — your mindset and your physical surroundings — receive so much attention. A calm, safe, and comfortable space can help the nervous system soften enough to do meaningful work. A rushed clinical room with no follow-up rarely offers the same.
What to expect at Nushama in Manhattan
Nushama is a psychedelic wellness center in Midtown Manhattan, with a flagship space at 515 Madison Avenue designed to feel more like a sanctuary than a clinic. Here’s how the path typically unfolds.
1. Medical and psychiatric screening
Every member begins with a thorough intake. A medical and psychiatric evaluation reviews your history, current medications, and goals, and screens for conditions that would make ketamine a poor fit — for example, uncontrolled high blood pressure. In some cases this includes blood work or other testing. The aim is simple: to confirm ketamine-assisted therapy is appropriate and safe for you.
2. Preparation
Before any medicine, you’ll meet with the care team to prepare. This is where intentions are set and questions are answered, so the experience feels less uncertain and more your own.
3. The IV ketamine journey
During each session, board-certified physicians and registered nurses are present throughout. Dosing is individually titrated and adjusted in real time, and vitals are monitored closely. A member-operated call button lets you summon a clinician to pause the infusion at any moment — and because ketamine’s effects fade quickly, any discomfort tends to ease within minutes.
4. Integration
After the journey, the work continues. Integration sessions with licensed therapists or trained integration guides help you carry insights into everyday life. Nushama also offers community programming and group options, because healing is often amplified by connection rather than isolation.
Is IV ketamine right for your PTSD?
There’s no single profile of a good candidate, but ketamine therapy is often considered for adults who:
- have tried therapy, EMDR, or medication and still carry significant symptoms,
- live with complex or long-standing PTSD,
- are willing to pair treatment with ongoing therapeutic and integration support, and
- are medically cleared after screening.
Ketamine is not appropriate for everyone. Certain heart, blood-pressure, or psychiatric conditions call for caution, which is exactly what a consultation is for. It’s also worth knowing that ketamine is FDA-approved as an anesthetic and is used off-label for PTSD — a common, legal practice when guided by a licensed clinician and supported by evidence.
If you’d like to explore whether this path fits your situation, speak with our care team to begin with a conversation, not a commitment.
Frequently asked questions
Is ketamine FDA-approved for PTSD?
Ketamine is FDA-approved as an anesthetic and is used off-label for PTSD. Off-label prescribing is common and legal when a licensed clinician determines it’s appropriate and the decision is supported by clinical evidence.
How is IV ketamine different from Spravato or at-home options?
IV ketamine is delivered through a vein, so dosing can be adjusted moment to moment under close monitoring. Esketamine (Spravato) is a nasal spray derived from ketamine and administered in a certified setting. At-home or intranasal options can be less predictable and harder to monitor, which is why supervised IV care is often preferred for complex PTSD. You can compare IV ketamine and Spravato here.
Will I be sedated or unconscious during treatment?
No. The doses used for therapy are far lower than anesthetic doses. You may feel a temporary sense of dissociation, but you remain in a monitored, supported setting the entire time.
How soon might I notice a difference?
Some people report shifts within hours to days, while others need a full series of sessions. Research suggests relief can come quickly for some, but outcomes vary by individual, and durable change is supported by integration.
Can I continue my current medications?
Often, yes. Ketamine interacts minimally with many psychiatric medications, but your prescriber will review your full medication list during screening to be sure.
A gentle next step
If standard treatments haven’t brought the relief you’re looking for, that chapter doesn’t have to be the whole story. Evidence-based, medically supervised IV ketamine therapy — delivered in a calm setting with real preparation and integration — may offer a different way forward.
When you’re ready, book a consultation with our care team to talk it through at your own pace.
This article is for educational purposes and is not medical advice. Please consult a qualified clinician about your specific situation.