One of the most common questions people ask before starting ketamine therapy is surprisingly practical: “Do I need to stop my antidepressants first?”
It’s an understandable concern. Many patients considering ketamine or Spravato have already spent years navigating medication changes, side effects, taper schedules, and the emotional ups and downs that can come with trying something new. The idea of stopping a medication abruptly can feel intimidating, especially if it’s helping even a little.
The good news is that current research suggests many patients do not need to stop SSRIs, SNRIs, or other antidepressants in order for ketamine treatment to work effectively.
A recent study published in the Journal of Clinical Psychiatry examined more than 300 patients receiving IV ketamine or intranasal esketamine for treatment-resistant depression. Researchers found that outcomes did not significantly differ based on whether patients were taking an SSRI, SNRI, another antidepressant, or no antidepressant at all during treatment.
In simple terms: Patients improved across the board.
For many people, antidepressants are not all-or-nothing medications. Some help partially. Some reduce anxiety while not fully lifting depression. Others may stabilize mood enough to make daily life manageable, even if symptoms remain.
Because of that, many patients worry they’ll have to “start from zero” before trying ketamine. That’s usually not the case.
Ketamine works through a different system in the brain than most traditional antidepressants. SSRIs and SNRIs primarily affect serotonin and norepinephrine. Ketamine appears to work more directly through the brain’s glutamate system, which is involved in neural communication and neuroplasticity—the brain’s ability to adapt and form new connections.
That distinction may explain why the Yale study found no major differences in treatment outcomes based on concurrent antidepressant use.
Even though the study is reassuring, medication management still matters.
Every patient has a different history, different symptoms, and different biological responses. Some people continue antidepressants during ketamine treatment without issue. Others may eventually decide—with guidance from their provider—that adjustments make sense over time.
The important thing is this: Medication changes should always be thoughtful and medically supervised.
Stopping antidepressants abruptly can cause withdrawal symptoms, mood instability, increased anxiety, and physical side effects. Ketamine treatment is not designed to replace careful psychiatric care. It works best as part of a larger treatment plan.
A lot of people considering ketamine therapy are already exhausted from trial-and-error treatment.
They’ve changed medications repeatedly. Adjusted doses. Waited weeks for effects that never fully arrived. The idea of adding another major transition before even starting treatment can feel overwhelming.
This research helps reduce some of that uncertainty.
For many patients, ketamine treatment can be explored without immediately disrupting the medications they’re currently taking. That allows providers to focus on something more important: whether ketamine itself is helping move the brain out of depressive patterns.
The Yale study also reinforces something researchers and clinicians have increasingly observed over the past decade:
Ketamine is not simply “another antidepressant.”
It works differently. Faster in many cases. Through different brain pathways. And for some patients, that difference matters enormously.
The study’s authors suggested that ketamine’s effects may operate independently from traditional antidepressant mechanisms, which is part of why it has become such an important option for treatment-resistant depression.
That doesn’t mean it works for everyone. But it does mean patients who haven’t found relief through standard medications may still have meaningful options left to explore.
If you’re considering ketamine therapy, you may not need to stop your antidepressants beforehand. Recent research found that patients improved regardless of whether they were taking SSRIs, SNRIs, other antidepressants, or no oral antidepressant during treatment.
The right approach depends on your symptoms, medical history, and treatment goals. That’s why evaluation and ongoing guidance matter.
At New Pathways Clinic, we approach these decisions carefully and collaboratively. The goal isn’t to rush medication changes or promise quick fixes. It’s to help you understand your options clearly and build a treatment plan that actually fits your life.
