Who Shouldn't Get Ketamine Therapy? Contraindications

Who Shouldn't Get Ketamine Therapy?

There's no single exclusion list that covers every kind of ketamine treatment, and that's the first thing worth understanding.

The answer depends on which treatment you're considering. Spravato has formal contraindications printed in its FDA labeling. Off-label psychiatric ketamine, whether intravenous, intramuscular, or oral, has no federally defined psychiatric exclusion list. Our comparison of IV ketamine and Spravato explains how the two differ. Individual clinics set their own policies, and those policies differ.

So a person could be turned away by one clinic and accepted by another without either being wrong. That sounds unsatisfying, but it's the actual state of things.

What follows separates the genuinely absolute exclusions from the much larger group of situations that call for a closer look, a delay, or extra monitoring.

What Does "Contraindication" Actually Mean?

Most articles on this subject use one word for four different things. Sorting them out makes the rest of this much easier to read.

A contraindication means the treatment shouldn't be given to that person, full stop. On a drug label it's a short, specific list.

A warning or precaution flags a real risk that needs managing. It doesn't mean treatment is off the table.

A relative contraindication is a judgment call, where risk and benefit get weighed for the individual.

A temporary reason to postpone is about timing. Something needs to be treated, stabilized, or clarified first, then the question gets revisited.

This matters because the formal contraindication list for Spravato is short, while the list of things you'll see described online as contraindications is long. Most of those are precautions.

Spravato Has Specific Contraindications

These are the exclusions printed in the current Spravato labeling, and they're the only ones on that list:

Aneurysmal vascular disease, covering the thoracic and abdominal aorta, intracranial vessels, and peripheral arterial vessels, or arteriovenous malformation
A history of intracerebral hemorrhage, meaning bleeding in the brain
Hypersensitivity to esketamine, ketamine, or any of the excipients

The label groups the first two vascular conditions together, and the logic behind them is the same. Spravato raises blood pressure, and in a vessel that's already weakened or malformed, that increase carries real danger.

Nothing else appears on that list. Not psychosis, not bipolar disorder, not a history of substance use. Those are addressed elsewhere in the labeling as warnings, which is a different category.

Generic ketamine has its own labeled contraindications: patients for whom a significant rise in blood pressure would be a serious hazard, and known hypersensitivity to ketamine or any excipient. One caveat matters a great deal. That prescribing information covers ketamine's approved use as an anesthetic, not psychiatric treatment. Psychiatric IV and IM ketamine are off-label, so this is relevant medical information rather than a federally defined psychiatric eligibility rule.

Blood Pressure and Cardiovascular Problems

This is where the difference between the categories matters most.

Uncontrolled high blood pressure is not listed as a formal Spravato contraindication. The labeling handles it with specific guidance instead. The label offers 140 systolic or 90 diastolic only as an example of what counts as elevated baseline blood pressure, and it is not a threshold that disqualifies anyone. Above it, the clinician is directed to weigh the risks of a short-term increase against the benefit of treatment for that individual. The label reserves its one firm instruction for a different situation: don't administer Spravato if an increase in blood pressure or intracranial pressure would itself pose a serious risk.

So there's no number that rules you out. There's a number that prompts a conversation.

For other cardiovascular and cerebrovascular conditions, the labeling says patients should be carefully assessed to determine whether the benefits outweigh the risks. Again, assessment rather than exclusion.

Generic ketamine reads stricter on paper. Its labeled contraindication covers anyone for whom a significant blood pressure elevation would be a serious hazard, which is a clinical judgment rather than a number. Remember that this labeling is written for anesthesia, so a psychiatric clinic is applying it by analogy rather than following a psychiatric rule.

In practice, uncontrolled blood pressure is one of the most common reasons treatment gets postponed rather than refused. Get it managed, then revisit.

Psychosis Does Not Automatically Mean You Can Never Be Treated

You'll see psychosis listed as an absolute disqualifier almost everywhere. The labeling doesn't support that.

The current Spravato label addresses this directly. Given the drug's potential to cause dissociative effects, it says patients with psychosis should be carefully assessed before treatment. Treatment should begin only if the benefit outweighs the risk. Psychosis is not among the formal contraindications.

That's a meaningful distinction. It means the decision belongs to a clinician who knows the person, not to a checkbox.

Off-label ketamine clinics often apply more conservative policies. Active psychosis leads many clinicians to postpone or decline, and that's a defensible position. It just isn't a universal federal rule, and clinics vary.

Our guide to who is a good candidate for ketamine therapy covers how that assessment usually works.

Mania, Hypomania, and Bipolar Disorder

Worth being precise here, because the Spravato label contains no warning section about mania, bipolar disorder, or mood activation at all. What guidance exists comes from clinical practice and professional consensus rather than regulatory labeling.

Neither a bipolar diagnosis nor an active manic episode appears as a contraindication on either label. What follows is clinical practice, not a regulatory rule.

Two things get conflated. Having a bipolar diagnosis is not the same as being in an acute manic or hypomanic episode. The first is a factor to weigh. The second generally calls for psychiatric reassessment first, and depending on the situation a clinician may postpone treatment until the episode settles.

Clinicians also want the diagnosis confirmed before treating. Depression that turns out to be bipolar depression changes the treatment conversation, and recent guidance has found insufficient evidence to recommend for or against ketamine in bipolar disorder specifically.

A bipolar diagnosis doesn't rule you out. It does mean the evaluation should be thorough and the monitoring closer.

Substance Use and Ketamine Misuse Risk

Ketamine and Spravato both carry genuine abuse and misuse potential, and Spravato's boxed warning names it explicitly. This gets taken seriously in screening, and it should be.

But a history of substance use doesn't automatically exclude anyone. Many people in recovery are treated safely with appropriate structure around them.

What tends to matter is whether the situation is current or past, whether ketamine or other dissociatives were involved, and whether there's support in place. Prior ketamine misuse specifically draws closer scrutiny, for reasons that should be obvious.

Clinics differ considerably in how they handle this. Some decline, some treat with additional monitoring, some coordinate with an existing addiction provider. If this applies to you, raising it directly usually gets a more useful answer than hoping it doesn't come up.

Pregnancy and Breastfeeding

Both products address this, with slightly different wording, and neither lists pregnancy as a formal contraindication.

Spravato labeling says it isn't recommended during pregnancy, and advises telling pregnant patients about the potential risk to an infant exposed in utero.

Breastfeeding is addressed separately in the Spravato label, which does not recommend it during treatment, because esketamine is present in human milk and there's a potential neurotoxicity concern for a nursing infant.

Generic ketamine injection labeling says use in pregnancy, including in obstetrics, isn't recommended because safe use hasn't been established. That label has no separate lactation section.

If you're pregnant, breastfeeding, or planning a pregnancy, say so early in the process. It changes the conversation rather than simply ending it, and the timing question is worth discussing with both your prescriber and your obstetric provider.

Medications That May Require Extra Review

Almost nothing in this category is an automatic exclusion. The labeling handles medication interactions with monitoring instructions, not prohibitions.

CNS depressants, including benzodiazepines, opioids, and alcohol, may increase sedation with Spravato, and the label directs close monitoring for it. Generic ketamine labeling is blunter, warning that combining it with opioids, benzodiazepines, or other CNS depressants may cause profound sedation, respiratory depression, coma, and death.

Psychostimulants such as amphetamines, methylphenidate, modafinil, and armodafinil may raise blood pressure, so blood pressure gets monitored closely.

MAOIs may also raise blood pressure, and the label again calls for close monitoring. Notably, MAOIs are frequently described online as a contraindication for ketamine. The current Spravato labeling does not list them that way.

Typical outcomes are closer monitoring, adjusted timing, coordination with your other prescriber, or extra evaluation. Bring a complete list, including anything you take occasionally.

Never stop, reduce, or skip a prescribed medication on your own to qualify for treatment. That decision belongs to the clinician who prescribed it.

Liver, Urinary, Respiratory, and Other Medical Concerns

A few specifics worth knowing, since these come up in screening.

Liver. Spravato hasn't been studied in severe hepatic impairment, and its use isn't recommended there. Moderate impairment may mean a longer monitoring period. Generic ketamine labeling notes hepatobiliary dysfunction with recurrent use. It recommends baseline liver function tests, including alkaline phosphatase and GGT, for anyone on a plan involving repeated dosing, then periodic monitoring after that.

Urinary and bladder. Spravato labeling reports higher rates of lower urinary tract symptoms than placebo and directs clinicians to monitor for them. No esketamine-related interstitial cystitis was seen in studies running up to a year. Existing bladder problems usually mean closer monitoring rather than exclusion.

Respiratory. Sedation and respiratory depression appear in Spravato's boxed warning, which is why observation includes pulse oximetry. Respiratory disease itself isn't listed as a contraindication on either label. It's something that can affect how carefully you're evaluated and how closely you're monitored.

Our guide on whether ketamine therapy is safe covers the longer-term picture in more depth.

Reasons Treatment May Be Delayed Instead of Ruled Out

This is the distinction most worth taking away. "Not right now" is a completely different answer from "never," and it's the more common one.

Situations that often mean waiting rather than declining:

Blood pressure that isn't yet controlled
Being intoxicated at the time of the appointment
An unstable medical illness that needs attention first
An active manic episode
A recent medication change that hasn't settled
Incomplete medical records or an unclear history
Waiting on cardiology or another specialist's input
Pregnancy or active pregnancy planning
Another acute psychiatric situation needing stabilization

None of these always requires postponement. They're common reasons a clinician might pause, and most of them resolve. If you get a no, it's worth finding out which kind of no it is.

Practical Problems Are Not Medical Contraindications

Some barriers have nothing to do with whether treatment is medically appropriate.

Not having a ride home, struggling to attend repeated appointments, work scheduling, cost, waiting on insurance authorization, childcare, and distance from the nearest clinic all make treatment harder to arrange. None of them is a medical reason you shouldn't be treated.

The reason to separate these is practical. Logistical problems sometimes have solutions a clinic can help with, and they're worth raising rather than quietly deciding you don't qualify.

How a Clinic Decides Whether Treatment Can Proceed Safely

A thorough evaluation usually works through:

Medical history, with attention to cardiovascular and vascular conditions
Psychiatric history, including psychosis, mania, and hospitalizations
Current diagnosis and symptoms
A full medication review
Blood pressure and overall cardiovascular risk
Substance use history
Pregnancy status where relevant
Which treatment type is being considered
What monitoring would be required
Whether records or specialist clearance are needed first

The treating clinician makes the final call. That's not a formality. They're the one accountable for it.

What to Ask If a Clinic Says You're Not a Candidate

A no deserves a follow-up question. Useful ones:

Is this permanent, or something that could change?
Is the concern specific to Spravato, or to ketamine generally?
Is it medical, psychiatric, or something else?
Would treating another condition first change your answer?
Would clearance from another specialist help?
Would a different treatment type be more appropriate?
What specific risk are you concerned about?

One caution. The goal of asking is to understand the reasoning, not to keep calling clinics until someone agrees to treat you. If several providers raise the same concern, that concern is probably real, and the more useful path is addressing it.

Finding a Clinic That Screens Carefully

It doesn't feel that way in the moment, but a clinic willing to say no is showing you something good. Declining or delaying treatment when the situation calls for it is what careful screening looks like. A provider who treats everyone who asks isn't screening at all.

Our guide to choosing a ketamine clinic covers what else separates a thorough provider from a casual one, and our candidacy guide covers the other side of this question.

When you're ready to look, you can search clinics near you, or browse by treatment type through Spravato treatment centers and ketamine infusion clinics.