Ketamine and Treatment-Resistant Depression: What to Know

For most of the people we see at Hydrate Medical Asheville, the story is the same. They have tried two, three, sometimes five different antidepressants. They have done the cognitive behavioral work. They have adjusted sleep, diet, exercise, and the dozen other levers that primary care and psychiatry recommend before considering a treatment that needs a full clinical evaluation to access. They are still depressed. And they want to know whether ketamine therapy is the answer.

The honest answer is: maybe. This post walks through what the research says, what ketamine therapy can and cannot do, and how to decide whether it is worth exploring.

What Treatment-Resistant Depression Actually Means

Treatment-resistant depression (TRD) is the clinical label for major depressive disorder that has not responded adequately to two or more antidepressant medications, taken at full dose and for an adequate duration. The label is descriptive, not prescriptive. It does not mean your depression is untreatable. It means the first-line tools have not worked for you.

About one in three people with major depressive disorder meet criteria for treatment-resistant depression. This is not a rare condition. The lived experience is brutal: months or years of trying medications, dealing with side effects, and waiting for something to shift.

The reasons for treatment resistance are not fully understood. Genetics play a role. So do unprocessed trauma, sleep disruption, hormonal factors, inflammation, and the specific neurobiology of each individual. The current generation of antidepressants targets serotonin, norepinephrine, and dopamine systems. For patients whose depression involves other neurochemical pathways, those medications may simply not reach the dysfunction.

This is the gap that ketamine therapy was studied to address. For a deeper look at how we approach depression specifically, see our ketamine therapy for depression page.

What Ketamine Does Differently

Standard antidepressants modulate monoamine systems (serotonin, norepinephrine, dopamine). They typically take four to six weeks to produce a noticeable effect. They work for most people who take them, but not all.

Ketamine works primarily on the glutamate system through NMDA receptor antagonism, with downstream effects on synaptic plasticity, which is the brain’s ability to form new neural connections. It opens a different chemical conversation. For some patients, that different mechanism produces a response within 24 hours of a first infusion.

The published response rates in randomized controlled trials of IV ketamine for treatment-resistant depression sit in the 50 to 70 percent range, with remission rates in the 30 to 40 percent range. Those are clinically meaningful numbers for a population that, by definition, has not responded to multiple other treatments.

What Ketamine Cannot Do

Ketamine therapy is not a cure for depression. It is a tool, sometimes a powerful one, that may support recovery alongside the rest of your treatment plan. Specifically:

• It does not erase trauma. Many patients with TRD have unprocessed trauma underneath the depression. Ketamine can help reduce symptoms and create a window for processing, but the trauma work itself happens with a therapist. This is why some patients pair infusions with ketamine-assisted psychotherapy (KAP).
• It does not replace lifestyle interventions. Sleep, movement, nutrition, social connection. The research on what helps depression maintain remission is consistent: the lifestyle foundation matters.
• It does not work for everyone. Some patients respond. Some respond partially. Some do not respond. We do not know in advance which group you will be in.
• It is not a one-time fix. Maintenance dosing is part of the protocol for most responders.

We say this not to discourage, but because patients who walk in expecting a single miracle session are more likely to feel discouraged when the reality is more nuanced.

How to Decide Whether to Try It

A few questions worth sitting with before you book a consult.

Have you given the first-line treatments a real chance?

Two or more antidepressants at full dose, taken for at least six weeks each, before deciding they did not work. If you stopped at week three because of side effects, that is information, but it may not yet count as a full trial. A psychiatrist or primary care physician can help you assess this.

Is your depression severe enough to justify the cost and time?

Ketamine therapy is paid out of pocket for most patients. Plan for the initial series plus maintenance. Some patients describe it as the most important medical investment they have made. Others find the cost-benefit ratio less compelling. Only you can decide.

Are you working with a therapist?

Evidence suggests ketamine works best alongside ongoing mental health care. If you do not currently have a therapist, that is something to consider setting up in parallel, either before you start or during the initial series.

Do you have a support person?

You will need a ride home after each session. You will benefit from someone to talk to about what arises. Plan this in advance.

Are you open to the experience itself?

Most patients experience some dissociation during infusion, meaning changes in perception of time, space, or self. Some patients find this interesting or peaceful. Others find it uncomfortable. You can stop or pause a session at any time, but going in with realistic expectations matters.

What Treatment Looks Like in Asheville

The first step is a free 15-minute phone consult. We answer your questions and confirm whether ketamine therapy is a likely fit. If yes, we schedule a medical evaluation. A licensed clinician reviews your medical history, current medications, mental health history, and treatment goals. If you are cleared for treatment, you and your clinician set a starting protocol together.

Most patients begin with 6 infusions over 2 to 3 weeks. Each session runs 40 to 60 minutes of active infusion, with 30 minutes of recovery time after. Vital signs are monitored continuously by emergency-medicine-trained clinicians. The treatment room is private, dim, and quiet.

For a step-by-step breakdown of your first visit, see our what to expect page.

After the initial series, your clinician will recommend a maintenance schedule based on how you have responded. Some patients return every four to eight weeks. Others spread out further. A few do not need maintenance at all and check back in only if symptoms return.

When Ketamine Is Probably Not the Right Move

A short, honest list of cases where another path is probably better:

• If you have not yet given first-line treatments a real chance
• If you are in active substance use disorder (case-by-case clinical review applies)
• If you have uncontrolled cardiovascular disease
• If you are currently in psychiatric crisis without psychiatric collaboration in place
• If the cost would create financial harm to your household

In any of these cases, the right answer is a conversation with your primary care physician or psychiatrist about other options. Spravato (esketamine) is one alternative that is covered by some insurance plans for TRD. We wrote a separate piece comparing the two: IV ketamine vs Spravato.

If you are currently a patient at another regional clinic and considering a change of providers, our continuing care page walks through how to transition treatment without losing momentum.