Ketamine has meaningfully changed how psychiatrists approach depression and related conditions. Since 2017, our Washington, DC practice has provided ketamine treatment in a psychiatric setting. Over time, we’ve completed hundreds of comprehensive consultations and thousands of ketamine treatments. That depth of experience has reinforced an essential clinical reality:
Ketamine is powerful, but it is not universal.
Some patients respond robustly. Others experience partial or short-lived benefits. And some do not respond at all. Knowing what to do next and when to stop is just as important as knowing when to start.
First: Defining What “Not Working” Means
Before concluding that ketamine is not working, it’s important to clearly define what “non-response” actually looks like in clinical practice. Ketamine treatment response is not binary and determining whether ketamine therapy is effective requires careful evaluation over time, not a single infusion or subjective impression.
In practice, ketamine may be considered ineffective when one or more of the following are present:
- No meaningful improvement after an adequate trial
- Initial benefit that fades quickly or cannot be sustained
- Side effects that outweigh clinical gains
- Symptom change without real functional improvement
Ketamine is not a single event. It is a timed trial whose outcome must be interpreted carefully in the context of the patient’s overall treatment goals. Tracking your progress throughout therapy can help you and your psychiatrist recognize whether the treatment is having the intended effect, or if adjustments are needed.
Our Clinical Philosophy
Over years of treating complex, hard-to-treat illness, our clinical philosophy has become increasingly clear:
Advanced treatments work best when they are embedded in rigorous psychiatric care and oversight not when they are treated as standalone solutions.
This distinction is particularly important given the rise of protocol-driven ketamine centers, many of which are non-psychiatric infusion practices where care may rely on fixed dosing algorithms rather than ongoing diagnostic reassessment, longitudinal psychiatric oversight, or clinician judgment informed by psychiatric training. Several principles guide what we do when ketamine does not help.
Diagnosis Comes First and Gets Revisited
Apparent treatment resistance often reflects diagnostic complexity rather than lack of options. When ketamine is ineffective, we reassess fundamentals:
- Is the primary illness unipolar depression, bipolar spectrum illness, trauma-related pathology, OCD, or a mixed presentation?
- Are anxiety, dissociation, or personality structure driving distress more than mood symptoms?
- Are sleep disorders, substance use, medical illness, or neurodevelopmental factors playing a larger role than initially appreciated?
Ketamine tends to work best for certain depressive phenotypes. When it fails, that information itself is diagnostically meaningful.
In contrast, non-psychiatric or protocol-based ketamine models often lack the framework to meaningfully reinterpret non-response, leading either to premature discontinuation or prolonged treatment without clear benefit.
Treatments Are Trials, Not Commitments
Ketamine, like TMS or medication strategies, is not something we continue indefinitely without benefit. If an intervention does not produce clinically meaningful and functionally relevant improvement, we stop and we explain why.
Stopping treatment is not a failure. It is a clinical decision.
This differs from models where ketamine is delivered as a recurring service rather than evaluated as a psychiatric intervention within an evolving treatment plan.
Mechanism Matters
When ketamine does not work, it often tells us that glutamatergic modulation alone is insufficient. That insight helps guide the next step, rather than prompting repetition of the same intervention.
Understanding mechanism is a core advantage of psychiatrist-led care.
Reassessing the Ketamine Trial Itself
Not all ketamine trials are equivalent. Before moving on, we examine:
- Dose and route of administration
- Number and spacing of treatments
- Concurrent medications that may blunt response
- Whether dissociation or expectation was mistaken for antidepressant effect
Sometimes, protocol adjustments are reasonable. Other times, continuing ketamine adds burden without benefit and stopping is the right clinical choice.
In protocol-driven ketamine centers, this level of reassessment is often limited by scope of practice or lack of longitudinal psychiatric involvement.
Looking Beyond Ketamine
Ketamine is one tool, not the endpoint of care. When it does not work, we shift deliberately to other evidence-based strategies, such as TMS.
Transcranial Magnetic Stimulation (TMS): A Different Mechanism
When ketamine does not help, or helps only partially, Transcranial Magnetic Stimulation (TMS) is often a logical next step. Ketamine and TMS work through fundamentally different neurobiological mechanisms:
- Ketamine acts primarily through glutamatergic modulation, increasing synaptic plasticity via NMDA antagonism and downstream AMPA signaling.
- TMS directly targets specific cortical circuits, most commonly the dorsolateral prefrontal cortex, using focused electromagnetic stimulation to:
- Modulate neuronal excitability
- Strengthen underactive networks
- Restore top-down regulation of mood, cognition, and affect
In practical terms, ketamine works more diffusely and chemically, while TMS works circuit-by-circuit.
Why TMS Can Work When Ketamine Doesn’t
Patients who do not respond to ketamine may still respond well to TMS when:
- Network-level dysregulation predominates
- Anxiety, rumination, or cognitive control dysfunction is central
- Dissociation or trauma-related symptoms limit ketamine’s benefit
TMS does not rely on dissociation, does not involve systemic medication exposure, and produces cumulative neuroplastic change over time.
Our previous bog post goes into more detail about the differences between ketamine and TMS, from its overall effectiveness to its side effects. Just because one option doesn’t work as you and your psychiatrist hoped for, doesn’t mean the other one is not worth trying.
Revisiting Medications, Thoughtfully and Precisely
When ketamine does not work, we often return to medication strategy with a more refined diagnostic lens. This includes asking critical questions that are frequently overlooked:
- Were prior medication trials truly adequate in dose and duration?
- Was dosing optimized, or were medications stopped before reaching therapeutic ranges?
- Were older, evidence-based treatments bypassed too quickly?
Medications require psychiatric expertise, careful monitoring, and patient education but they remain among the most effective treatments when used correctly.
Psychotherapy and the Broader System
Medication and neuromodulation work best when integrated with:
- Psychotherapy matched to diagnosis (e.g., trauma-focused, OCD-specific, structured approaches)
- Sleep and circadian rhythm optimization
- Substance use reduction
- Evaluation of medical contributors such as thyroid disease, chronic pain, or inflammation
Mental health conditions are often multi-factorial. Improvement usually is too.
Knowing When Ketamine Is Not the Right Tool
One of the most important clinical decisions, particularly in the context of non-psychiatric ketamine infusion centers is recognizing when ketamine is no longer appropriate. Continuing ketamine without benefit can:
- Delay more effective treatments
- Increase frustration and hopelessness
- Create the illusion of care without progress
Stopping ketamine is not abandonment. It is part of ethical psychiatric practice.
This is why it’s essential to not go to a standalone ketamine clinic in Washington DC. You want to go to a ketamine therapy clinic that offers other evidence-based interventional options (TMS, SGB, medication optimization, psychotherapy modalities) and can easily adapt if you don’t respond well to the initial treatment.
The Bigger Picture
If ketamine does not work, it does not mean your illness is untreatable, and that there is no remaining path forward. It means we have learned something important and that information guides the next, more informed step.
For patients with complex mental health conditions, progress is rarely linear. Our role as your psychiatrist is to continually refine the diagnosis, choosing treatments based on mechanism, and maintaining continuity and perseverance rather than defaulting to protocol-based care. Meaningful improvement comes from thoughtful reassessment and adjustment, rather than continuing the same treatment out of habit.
