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Esketamine Therapy for Depression: How It Works and What to Expect

By Dr. Smriti Vajpeyi| Last Updated at: 28th Sept '26| 16 Min Read

Overview

Esketamine therapy, available as the nasal spray SPRAVATO, is a treatment option for some people with depression that has not improved with traditional antidepressants. Unlike most conventional antidepressants, esketamine works primarily through the glutamate system and NMDA receptors. This article explains how esketamine works, who may be considered for treatment, what happens during a supervised session, possible side effects, and why a psychiatric evaluation is important before starting therapy.

Esketamine Therapy for Depression: How It Works and What to Expect

Depression doesn't always play by the rules. You try one antidepressant, then maybe another, add therapy into the mix  and somehow the symptoms just. stick around. If that sounds familiar, esketamine therapy might be worth a conversation with your doctor. It's not for everyone, but it's an option a lot of people don't even know exists.

SPRAVATO is the brand name  esketamine's the active ingredient, and it comes as a nasal spray. You can't take it home, though. It has to happen in a certified clinical setting, with someone watching over you. The reason it's gotten attention lately is simple: it doesn't work like most antidepressants. Different mechanisms, different results for some people.

So what is this, exactly?

Esketamine is chemically close to ketamine. Doctors use it for depression that hasn't budged with other treatments. You go in, get the spray, and stay put for a while afterward no popping this at home between errands.

And no, you can't just walk in and ask for it. A provider has to actually dig into your history first: what you've tried before, how you responded, what else is going on health-wise, what meds you're currently on. Only then do they decide if it fits.

The brain science behind it

Here's the thing: most antidepressants go after serotonin or norepinephrine. Esketamine doesn't. It works through glutamate instead, mainly hitting NMDA receptors. Glutamate's a big deal for how neurons talk to each other, and messing with that system seems to shift mood in ways the older drugs don't quite manage.

It's not just a stronger pill. It's a whole different approach, which is part of why doctors treat it as a separate category rather than "just another antidepressant."

Who actually qualifies

There's no strict checklist, but expect your provider to ask about:

None of this is bureaucracy for its own sake. It's there so esketamine gets added into your care thoughtfully instead of just thrown at the problem.

What actually happens during a session

Pretty consistent process, session to session. Staff check on you before anything starts, make sure you're good to go. You get the spray. Then you wait under observation, not just left alone in a room. Once the team's satisfied you're stable, you're free to leave.

One thing to plan for: you probably shouldn't drive yourself home. Effects can linger a bit, so arrange a ride ahead of time.

What it might feel like

Everybody's different. Some people get dizzy, a little nauseous, sleepy, or notice things feel slightly "off" perception-wise for a short stretch. That's exactly why it's done under supervision, so if something feels wrong, someone's right there.

Tell your provider everything beforehand: meds, history, all of it. And if anything feels unusual during or after, say something.

How it stacks up against regular antidepressants

It's not that one's better than the other, really. Just different tools. Traditional meds lean on serotonin and norepinephrine; esketamine leans on glutamate. That difference is exactly why it's useful; it gives doctors another angle when the usual stuff hasn't worked.

Is it right for everyone? Straight answer: no.

This isn't something to self-diagnose off a blog post. A provider needs the full picture: your history, your current health, your meds, and how past treatments went before this even becomes an option worth discussing.

Looking for esketamine treatment near Ann Arbor?

If you're local and curious, it starts with just talking to a psychiatric provider about your symptoms and what you've already tried.

Family Care Psychiatry works with patients across Ann Arbor and nearby areas: Canton, Brighton, Plymouth, Ypsilanti, Chelsea, plus wider parts of Washtenaw, Wayne, Livingston, and Jackson counties. Having someone local makes this whole process a lot less confusing.

Good questions to bring to your provider

  • Why esketamine, specifically, for me?
  • How's this different from what I've already tried?
  • What actually happens during a session?
  • How long am I stuck there afterward?
  • What side effects should I expect?
  • How do we know if it's working?
  • What else should I be weighing against this?

It's usually part of something bigger

Esketamine rarely stands alone. Most people pair it with therapy, medication management, lifestyle changes  whatever fits their situation. How much weight it carries depends entirely on the person.

Conclusion

If depression's stuck around despite real effort, esketamine's worth bringing up with a psychiatric provider. It's given as SPRAVATO, always supervised, never a solo decision. A proper evaluation matters  for weighing the risks, the benefits, and figuring out if it's actually the right next step for you.

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