Clinical research has shown that ketamine produces rapid antidepressant effects in a significant portion of patients who have not responded to multiple prior medications — a finding that stands in stark contrast to the limited options traditionally available for treatment-resistant depression (PubMed, 2013). For the millions of people whose depression has not responded to one or more antidepressants, ketamine infusion therapy represents a clinically grounded option built on a fundamentally different mechanism. Understanding what it is, how it works, and what the process looks like is the first step toward deciding whether it belongs in your care.
What Makes Depression Treatment-Resistant
Major depressive disorder (MDD) affects an estimated 280 million people worldwide, and for a significant portion of them, standard first-line treatments fall short (Nature, 2021). Treatment-resistant depression (TRD) — a term used when a patient has not responded adequately to at least two antidepressant trials at therapeutic doses — represents one of the most challenging presentations in psychiatric care. These are not patients who gave up on medication too soon; these are patients for whom the standard approach has genuinely failed to produce sufficient relief.
The reasons for treatment resistance are not fully understood, but they likely involve the limitations of how most antidepressants work. Selective serotonin reuptake inhibitors (SSRIs) and serotonin-norepinephrine reuptake inhibitors (SNRIs) — the most commonly prescribed antidepressants — work by increasing the availability of serotonin and norepinephrine in the brain. For many patients, this approach is effective. For others, the biology of their depression involves pathways these medications do not directly address. Ketamine works through a different system entirely.
How Ketamine Works for Depression
Ketamine is an anesthetic with a history spanning more than 50 years in surgical and emergency medicine settings. Its antidepressant effects were identified more recently, and the mechanism behind them involves the glutamate system — the brain’s primary excitatory neurotransmitter network — rather than the serotonin and norepinephrine pathways targeted by conventional antidepressants.
Specifically, ketamine blocks NMDA receptors — N-methyl-D-aspartate receptors — which play a central role in synaptic plasticity, the brain’s ability to form and strengthen connections between neurons (Zorumski et al., 2016). Depression is associated with a reduction in synaptic connectivity in regions of the brain involved in mood regulation, including the prefrontal cortex. By blocking NMDA receptors, ketamine triggers a rapid increase in glutamate activity that promotes the growth of new synaptic connections — effectively working like a repair mechanism for the neural architecture that depression has degraded.
The clinical result of this mechanism is the feature that most distinguishes ketamine from conventional antidepressants: speed. Most antidepressants require six to eight weeks of consistent use before therapeutic effects become apparent. Ketamine’s antidepressant effects can be felt within hours of a single infusion (Nature, 2021). For patients who have been in a depressive episode for months or years, that timeline is significant. Research from the NIMH has shown that ketamine restores pleasure-seeking behavior — one of the core features lost in depression — ahead of other antidepressant actions, suggesting it targets the experience of depression quickly and directly (NIH, 2014). To better understand how depression affects the brain at a neurological level, including the regions ketamine works to repair, our in-depth overview is worth reading.
Ketamine has also been shown to increase brain-derived neurotrophic factor (BDNF), a protein essential to neuron growth and long-term mood regulation. This effect on neuroplasticity — the brain’s capacity to adapt and reorganize — may help explain why the benefits of a ketamine infusion series can extend well beyond the acute infusion period for many patients (PMC, 2021).
What IV Ketamine Infusion Therapy Looks Like at Wholistic Health
At Wholistic Health, we administer ketamine intravenously — the delivery method with the most robust clinical evidence for depression treatment. The standard course for mental health patients consists of six infusions administered over approximately two to three weeks. Each infusion runs 40 minutes, and the total visit — including preparation and recovery time — is approximately 90 minutes for subsequent sessions and up to two hours for your first visit.
Doses are calibrated to each individual based on weight, diagnosis, and symptom severity. You remain awake throughout the infusion, monitored by a nurse practitioner at all times. Some patients experience mild dissociative effects — a sense of detachment or altered perception — during the infusion itself. These effects are transient and typically resolve within the recovery period before you leave our office.
You will need a driver on the day of your infusion. We do not permit rideshare services for post-infusion transportation, and you should not drive or return to work the day of treatment. Most patients resume normal activity the following day.
After the initial six-infusion series, patients enter a maintenance phase. Booster infusions are scheduled as needed — typically every one to two months — based on how the individual patient responds over time. The interval between maintenance infusions varies; some patients go longer between sessions as their response stabilizes, while others find more frequent boosters support better sustained outcomes. Results vary by individual, and we build maintenance schedules around each patient’s actual experience rather than a fixed protocol. If you’d like a deeper look at what the full treatment journey involves, our ultimate guide to ketamine therapy for depression walks through the process in detail.
Ketamine Is Not FDA-Approved for Depression — and What That Means
IV ketamine for depression is an off-label use of the medication. Ketamine holds FDA approval as an anesthetic and analgesic; its use for mood disorders is supported by a substantial and growing body of clinical research but does not carry a formal FDA depression indication. This is worth understanding clearly: off-label does not mean experimental in the casual sense — it means the prescribing is based on clinical evidence and provider judgment rather than a formal approval pathway. Many widely used treatments in medicine operate this way.
For patients who prefer an FDA-approved option, we also offer SPRAVATO® (esketamine) — a nasal spray form of ketamine that holds FDA approval specifically for treatment-resistant depression in adults who have failed at least two antidepressants. SPRAVATO® is a related but distinct treatment and may be worth discussing during your consultation if FDA approval status is a priority for you.
Cost, Insurance, and What to Expect Financially
IV ketamine for depression is a self-pay service. The standard six-infusion series is $2,400, or $400 per infusion. We are straightforward about these numbers from the first conversation, because we believe patients deserve cost clarity before they make any commitment.
We offer payment plans through Advance Care Card for patients who need flexibility with the expense. Our team walks through financial details during consultation so you can make an informed decision about whether the treatment is accessible for your situation.
Insurance does not currently cover IV ketamine for depression, which is a real barrier for some patients. For those patients, SPRAVATO® — which we offer as an in-network provider — may provide a more financially accessible path to an esketamine-based treatment. We discuss both options openly during consultation.
Addressing Stigma Around Ketamine Therapy
Ketamine’s history as a recreational drug — sometimes called “Special K” — creates hesitation for some patients, and we understand that. The clinical context of ketamine therapy is distinct in every meaningful way from recreational use: the dose, the delivery method, the setting, and the purpose are all different. Ketamine has been used safely in operating rooms and emergency departments for decades. At therapeutic doses administered intravenously under clinical supervision, it functions as a precisely calibrated medical treatment, not a recreational substance.
Fear of the experience itself — particularly the dissociative effects that can occur during infusion — is another common concern. Most patients, once they have completed their first infusion, describe the experience as manageable and find it less significant than their anticipation suggested. Our team monitors every infusion from start to finish, and we take time before your first session to walk through exactly what to expect so that nothing catches you off guard. For additional context on what patients can expect going in, our overview of what to know before your first ketamine infusion session is a helpful resource.
Frequently Asked Questions
How quickly will I feel the effects of ketamine for depression? Many patients notice improvement within hours to days of their first infusion — a dramatically faster onset than the six to eight weeks typically required for conventional antidepressants to take effect (Nature, 2021). The degree and duration of improvement varies by individual, and some patients find that benefits accumulate more gradually over the six-infusion series rather than appearing after a single session.
Will ketamine work if multiple antidepressants have failed? Ketamine works through a different mechanism than SSRIs and SNRIs, which is part of why it may help patients for whom conventional antidepressants have not. Research has demonstrated rapid antidepressant effects in patients with treatment-resistant depression who have not responded to other medications (PubMed, 2013). Whether ketamine is appropriate for your specific situation depends on a thorough evaluation of your history — something we assess during your initial consultation.
Do I have to stop my current antidepressants to try ketamine? In most cases, no. Ketamine therapy is often used alongside existing medications rather than replacing them. Any changes to your medication regimen should be made in collaboration with your prescribing provider, and we coordinate with your care team as needed throughout your treatment.
What is the difference between IV ketamine and SPRAVATO®? IV ketamine and SPRAVATO® both involve esketamine or ketamine compounds acting on the glutamate system, but they differ in delivery method, FDA approval status, and how they are administered. IV ketamine is delivered intravenously and is used off-label for depression. SPRAVATO® is a nasal spray that holds FDA approval specifically for treatment-resistant depression and is administered in a certified healthcare setting with a two-hour observation period. We offer both at Wholistic Health and discuss which may be more appropriate during your consultation.
How long do the effects of a ketamine infusion series last? Duration of benefit varies considerably by individual. Some patients maintain improvement for several months between maintenance infusions; others require more frequent boosters. The maintenance phase is designed to be flexible — scheduled around your actual response rather than a predetermined interval.
Key Takeaways
- Ketamine infusion therapy works through the glutamate system via NMDA receptor blockade, producing rapid antidepressant effects that can be felt within hours — a mechanism and timeline distinct from conventional antidepressants.
- At Wholistic Health, the standard mental health protocol is six IV infusions over two to three weeks, each running 40 minutes, followed by individualized maintenance boosters.
- IV ketamine for depression is an off-label use supported by substantial clinical evidence; SPRAVATO® is an FDA-approved esketamine nasal spray available at our clinic for patients who prefer an approved option.
- The six-infusion series is $2,400 ($400 per infusion); payment plans are available through Advance Care Card.
- Results vary by individual — candidacy and expected outcomes are assessed through a thorough consultation that reviews your full treatment history.
Ketamine infusion therapy is not the right fit for everyone, but for patients whose depression has not responded to standard treatments, it offers a mechanistically different and clinically supported option worth exploring. At Wholistic Health, we evaluate every patient individually and give honest answers about what ketamine therapy may and may not offer for your specific situation. Call us at 251-276-4185 or schedule a consultation with our team today.
References
National Institute of Mental Health. (2014). Rapid agent restores pleasure-seeking ahead of other antidepressant action. https://www.nimh.nih.gov/news/science-updates/2014/rapid-agent-restores-pleasure-seeking-ahead-of-other-antidepressant-action
PMC. (2021). Ketamine and neuroplasticity. https://pmc.ncbi.nlm.nih.gov/articles/PMC8190578/
PubMed. (2013). Antidepressant efficacy of ketamine in treatment-resistant major depression. https://pubmed.ncbi.nlm.nih.gov/23982301/
Kishimoto, T., et al. (2021). Ketamine’s effectiveness for depression. Nature. https://www.nature.com/articles/s41398-021-01327-5
Zorumski, C. F., et al. (2016). NMDA receptors and synaptic plasticity. https://pmc.ncbi.nlm.nih.gov/articles/PMC9965111/
Medical Disclaimer
The information in this blog is for educational purposes only and does not constitute medical advice. Ketamine infusion therapy for depression is an off-label use of ketamine and should only be pursued under the supervision of a qualified healthcare provider who has reviewed your full medical and psychiatric history. Individual results vary — not all patients experience the same degree or duration of benefit. This content is not intended to diagnose, treat, cure, or prevent any disease or condition. Please consult a licensed provider before making any decisions about your care.