Treatment-resistant depression has a specific clinical meaning: depression that has not responded to at least two adequate trials of standard antidepressants. It is common, and being told to try a third variation of something that has already failed twice is its own particular demoralisation.
Ketamine matters here because it does not work the way those medications work.
A different mechanism
Standard antidepressants act on the monoamine system, mostly serotonin, and typically take four to six weeks to show benefit. If the mechanism is not the problem in your case, waiting six weeks to find out is expensive in a way that is hard to describe to someone who has not done it three times.
Ketamine acts on glutamate, the brain's most abundant neurotransmitter. Relief can begin within roughly forty minutes to a few hours rather than weeks.
Beyond speed, it appears to promote synaptogenesis, the growth of new connections between neurons. Chronic depression is associated with measurable shrinkage in regions such as the prefrontal cortex and hippocampus; ketamine appears to help reverse some of that. It is not only lifting mood, it is changing the substrate mood runs on.
What the numbers show
In real-world use for treatment-resistant depression, reported response rates run roughly 45 to 70 percent, with remission around 30 percent. In intensive formats combining ketamine with trauma-focused therapy, response in treatment-resistant cases has been reported as high as 85 percent.
Those figures deserve two pieces of context. They describe people for whom multiple previous treatments failed, which makes them more striking, not less. And a response is not a cure: benefit can persist for weeks to months, which is why what happens around the medication decides whether it lasts.
Why the therapy half is not optional
This is where treatment-resistant depression gets misunderstood. Depression that resists medication is frequently anchored in something: unprocessed trauma, entrenched belief, a nervous system that learned early that vigilance was survival.
Ketamine can lift the weight for a period. If nothing is done in that period, the weight tends to return, because nothing changed except the chemistry.
Pairing ketamine with trauma-focused therapy uses the window. The medication reduces the fear response that normally makes this material unbearable to approach, and modalities such as EMDR, Internal Family Systems, and Accelerated Resolution Therapy do the work while that is true.
What a course involves
Screening comes first: a medical and psychological assessment, including cardiac history, since ketamine transiently raises heart rate and blood pressure. Mood stabilisers are usually continued at stable doses.
Administration can be intramuscular, sublingual, or intravenous, each with a different onset and character. Outpatient courses commonly run around six sessions over two to four weeks. Intensive formats compress this into consecutive days, so momentum carries rather than dissipating between appointments.
Integration sessions afterwards are where insight becomes durable change.
The honest caveats
Ketamine is not a cure and not a substitute for ongoing care. It is not appropriate for everyone: uncontrolled hypertension, certain cardiac conditions, and a history of psychosis may rule it out. It is not for someone in acute crisis. And response varies with the severity and duration of the condition, other medications, sleep, stress, substance use, and individual biology.
How the KAIR Program approaches it
We run ketamine inside a three to five day intensive retreat rather than as a standalone treatment. Sessions are timed within the therapeutic week, each bookended by preparation and integration with the same clinician, who is working with you and no one else.
KAIR for depression covers the depression-specific version, and why a retreat explains the compressed format.
The KAIR Program is designed for deep therapeutic work and is not appropriate for acute crisis situations. If you are in crisis, please contact your local emergency services or crisis hotline for immediate support.
