If you’re considering Spravato (esketamine) for treatment-resistant depression, it makes sense to understand the side effects before your first session. The most common Spravato side effects — dissociation (a floaty, detached feeling), dizziness, nausea, drowsiness, and a temporary rise in blood pressure — usually peak within the first 30 to 40 minutes and fade within about two hours. Because they happen during treatment, you never have to manage them alone. At Bright Horizons Psychiatry in Rockville and Frederick, Maryland, every dose is given under medical supervision with at least two hours of monitoring. Here’s exactly what to expect, and how each effect is managed.
Key takeaways
- The most common side effects — dissociation, dizziness, nausea, sedation, and a short-lived blood-pressure increase — are usually mild and tied to the day of dosing.
- Most effects peak around 40 minutes and resolve within about 2 hours, while you’re still being monitored.
- Side effects often become milder as your body adjusts over later sessions.
- You cannot drive after a session, so you’ll need a ride home.
- Long-term safety data is reassuring, and supervised, in-clinic dosing keeps serious risks rare.
Common Spravato side effects at a glance
Most people notice at least one side effect during treatment, but they’re usually temporary and manageable. Here’s a quick overview of what tends to happen, when, and how it’s handled:
|
Side effect |
How common |
When it happens & how long |
How it’s managed |
|---|---|---|---|
|
Dissociation (feeling detached) |
Very common |
Peaks ~40 min, eases within ~2 hrs |
Calm room, breathing, reassurance from staff |
|
Dizziness / lightheadedness |
Common |
During the session, ~90 min |
Stay seated or reclined; monitored for safety |
|
Nausea (sometimes vomiting) |
Common |
First 1–2 hrs |
No food 2 hrs before; anti-nausea medication if needed |
|
Temporary rise in blood pressure |
Common |
Peaks ~40 min, normalizes in 2–4 hrs |
Vitals checked before, during & after each dose |
|
Drowsiness / sedation |
Common |
Can last the rest of the day |
No driving; rest at home; arrange a ride |
|
Headache, metallic taste, or nasal irritation |
Common |
Brief |
Water or a flavored drink; comfort measures |
These effects are linked to the day of dosing rather than building up between sessions — and for many patients they get milder as treatment continues.
How each side effect is managed
Dissociation
Dissociation is the side effect most people ask about. It can feel like watching yourself from the outside, or like time and space are slightly distorted. It sounds unsettling, but it’s expected, temporary, and often a sign the medication is working on your brain’s glutamate pathways. It typically peaks within the first 30 to 40 minutes and resolves within two hours. A quiet, comfortable room, calming music, and slow breathing make a real difference — and our staff is with you the whole time.
Nausea
Nausea is most likely in the first hour or two. The simplest prevention is not eating for two hours before your appointment and stopping fluids 30 minutes prior. If nausea still shows up, your provider can give an anti-nausea medication such as ondansetron, either during the session or beforehand to head it off.
Dizziness and blood pressure changes
A mild head rush or spinning sensation is common, and Spravato briefly raises blood pressure — usually peaking around 40 minutes and settling within a few hours. We check your blood pressure before, during, and after each dose, and you’ll stay seated or reclined so you don’t feel unsteady. Patients with uncontrolled hypertension or certain heart conditions are screened carefully before starting.
Drowsiness and sedation
Many patients feel sleepy or “heavy” after a dose, and that feeling can last the rest of the day. This is exactly why you can’t drive afterward and need a ride home. Plan a quiet evening, avoid important decisions, and let yourself rest — most people feel back to normal after a full night’s sleep.
How long do Spravato side effects last?
Spravato’s side effects follow a fairly predictable timeline, which makes treatment days easier to plan:
- First 30–40 minutes: Effects build and peak — usually dissociation, dizziness, and a rise in blood pressure.
- 1–2 hours: Effects start to ease as the medication clears; you’re still being monitored.
- 2–4 hours: Most people feel close to themselves again. Esketamine itself leaves your system within a few hours, though lingering drowsiness is normal.
- The next day: The large majority of patients feel back to baseline and can drive and resume normal activities.
How do you feel the day after Spravato? Most people feel normal, and some notice an early lift in mood. A few feel mildly tired or “off” for a day — if that happens, take it easy and mention it to your care team, who can adjust your dose or timing at the next visit. If dissociation, nausea, or a headache lingers into the next day, that’s worth a quick call to your provider.
Are Spravato’s side effects dangerous? What long-term use looks like
If you’ve read alarming stories online, it’s worth separating the rare from the routine. The everyday side effects above are temporary and manageable. Serious effects — significant sedation, slowed breathing, fainting, or a sharp blood-pressure spike — are uncommon and are precisely what the in-clinic monitoring period is designed to catch. Spravato also carries FDA boxed warnings for sedation, dissociation, and potential for misuse, which is why it’s given only in certified clinics under the REMS safety program and never taken home.
The long-term picture is reassuring. In the SUSTAIN-3 study, adults were followed for up to 6.5 years of treatment, and researchers found no new safety concerns beyond what’s seen in shorter studies. Cognitive function (memory, learning, focus) stayed stable, blood-pressure effects didn’t worsen over time, and no cases of bladder or urinary-tract damage were reported with supervised, prescribed use — a problem that has been linked instead to unsupervised, recreational ketamine. Most people who eventually stop Spravato do so because their depression has improved, not because of side effects.
Two groups should be especially carefully evaluated first: people with uncontrolled high blood pressure or certain heart or blood-vessel conditions, and anyone who is pregnant or breastfeeding. That screening is part of your intake at Bright Horizons Psychiatry.
How Bright Horizons Psychiatry keeps Spravato safe and comfortable
The right setting changes the entire experience. At Bright Horizons Psychiatry, Spravato (esketamine) is administered in our REMS-certified offices in Rockville and Frederick, Maryland, with the full two-hour monitoring period built into every visit. Our team checks your vitals, keeps the room calm and private, and is beside you if any side effect needs attention.
Just as importantly, treatment is led by Dr. Amir Etesam, whose Johns Hopkins training and focus on treatment-resistant depression means your plan — dose, schedule, and how side effects are handled — is tailored to you, not a one-size-fits-all protocol. We also verify your insurance benefits and handle the REMS enrollment paperwork, so you can focus on getting better.
If treatment-resistant depression has worn you down and you’re weighing whether Spravato is worth the side effects, let’s talk it through. Schedule a Spravato consultation at our Rockville or Frederick office, and we’ll review your history, answer your questions, and tell you honestly whether it’s a good fit.
Frequently asked questions
What are the long-term side effects of Spravato?
In studies following patients for up to 6.5 years, the side effects reported long-term were the same ones seen early on — headache, dizziness, nausea, and dissociation — tied to dosing days and resolving within hours. No cognitive decline, bladder damage, or increased misuse was found with supervised, prescribed use.
How will I feel the day after Spravato?
Most people feel back to normal the next day and can drive and return to their routine. Some notice an early mood lift; a few feel mildly tired for a day. Lingering nausea, headache, or dissociation into the next day is uncommon and worth reporting to your provider.
What should I avoid on Spravato treatment days?
Don’t eat for two hours before your dose or drink fluids in the 30 minutes before, to reduce nausea. Don’t drive after your session — arrange a ride. Avoid alcohol and other sedating substances, and skip important decisions until the next day after a full night’s sleep.
Does Spravato cause weight gain?
Weight gain is not a recognized common side effect of Spravato. Unlike some traditional antidepressants, it isn’t typically associated with weight changes. If your weight shifts during treatment, mention it to your provider, since depression itself and other medications can play a role.
How long do most people stay on Spravato?
It varies. Treatment usually starts with an induction phase (twice weekly for about four weeks), then tapers to weekly and eventually every one to two weeks based on your response. Many people stay on a maintenance schedule for months; your provider reassesses regularly.
