Who Is a Good Candidate for Ketamine Therapy?

There isn't a checklist that settles this. Candidacy is a clinical judgment, made by a provider who can see your full history, and it can't be worked out from a symptom list online.

The general shape of it is this. A potentially appropriate candidate is someone whose condition might reasonably respond to treatment, and who can receive it safely after medical and psychiatric screening. Both halves matter. Plenty of people meet the first and not the second.

What counts as appropriate also shifts depending on:

The diagnosis being treated
Whether the treatment is Spravato or off-label ketamine
The route, whether that's nasal spray, intravenous, intramuscular, or oral
Current medications
Medical history, particularly cardiovascular
Psychiatric history
What you're hoping treatment will do

That last point gets overlooked. Two people with the same diagnosis can get different answers, because their histories and goals differ.

If you're new to the subject, our guide to what ketamine therapy is covers the basics first.

Conditions Ketamine Is Commonly Considered For

Be careful with how these are grouped, because the regulatory footing varies a lot.

Treatment-resistant depression is where the evidence is strongest and where Spravato holds an FDA-approved indication for adults. It's also the most common reason people are referred for off-label ketamine.

Major depressive disorder with acute suicidal ideation or behavior is the second FDA-approved Spravato indication in adults. Worth noting precisely: the label states that effectiveness in preventing suicide, or in reducing suicidal ideation or behavior, hasn't been demonstrated.

Bipolar depression is sometimes treated, but the evidence is thinner. Recent guidance has concluded there isn't enough evidence to recommend for or against ketamine here, so this is very much a case-by-case clinical decision.

PTSD has mixed evidence. Some studies have found meaningful symptom improvement, while the VA and Department of Defense clinical practice guideline recommends against ketamine for PTSD. Different bodies have reached different conclusions here. Our guide to ketamine for PTSD goes into the detail.

Anxiety disorders have preliminary evidence, often in people who also have depression. It's an area of active study rather than settled practice.

Chronic pain is a separate world with its own literature and its own specialists, and it's usually managed outside psychiatric ketamine programs.

One line to keep straight throughout: Spravato has specific FDA-approved psychiatric indications. Ketamine itself is approved as an anesthetic, so every psychiatric use of generic ketamine is off-label, whatever the condition.

Treatment History Often Matters

Ketamine and Spravato are rarely anyone's first option, and prior treatment history is usually central to the conversation.

For Spravato, the treatment-resistant depression indication is written for adults, and it can be used either on its own or together with an oral antidepressant. That monotherapy option is newer, and a lot of older articles still say Spravato must always be paired with an antidepressant. That's no longer accurate for this indication.

The second indication works differently. For depressive symptoms in adults with major depressive disorder and acute suicidal ideation or behavior, Spravato is used together with an oral antidepressant.

People often ask how many medications have to fail first. The label doesn't set a formal number in its indications. The clinical trials enrolled patients who hadn't responded adequately to at least two different antidepressants at adequate dose and duration, and that's where the familiar "two failed antidepressants" figure comes from. Insurers frequently apply their own version of that requirement.

For off-label ketamine, there's no federal eligibility rule at all. Clinics set their own criteria, and they genuinely differ. Some want documented treatment failures, some want a referral from a mental health provider, some are more flexible. If a clinic tells you its criteria are federally mandated, that's worth questioning.

Symptoms Need to Be Evaluated in Context

A diagnosis on its own doesn't make someone a candidate, and this trips people up. Two patients can both have depression and get different recommendations.

Clinicians tend to weigh:

How severe the symptoms are right now
How long they've persisted
How much they interfere with work, relationships, and daily functioning
What's already been tried, and how you responded
Whether you're in acute crisis, which changes the urgency and the setting
Your broader psychiatric history, including past episodes
Whether a different diagnosis might explain the picture better

That last one matters more than it sounds. Symptoms that look like treatment-resistant depression sometimes turn out to be something else, and treating the wrong target rarely helps.

Medical Screening Is Part of Candidacy

Screening isn't a formality standing between you and treatment. It's the part that determines whether treatment can be given safely, and what form it should take.

Providers commonly review:

Blood pressure, including whether it's currently controlled
Cardiovascular history
Neurologic and vascular history
Pregnancy and breastfeeding status
Liver and urinary history, particularly where repeated dosing is planned
Respiratory conditions, where relevant to sedation
All current medications, including anything sedating
Substance use history

Something important gets lost when these appear as a list. Many findings don't disqualify anyone. They change the plan. High blood pressure often means treating the blood pressure first, then revisiting. A complicated cardiac history might mean cardiology input before a decision. A sedating medication might mean adjusting timing.

Our guide to whether ketamine therapy is safe covers the safeguards themselves in more depth.

Psychiatric Screening Matters Too

The psychiatric side of screening gets less attention than it deserves, and the language around it is often too absolute.

Psychosis is the clearest example. You'll see it described as a flat disqualifier. The current Spravato labeling is more measured: it says patients with psychosis should be carefully assessed before treatment, and that treatment should be started only if the benefit outweighs the risk. Psychosis isn't listed among the contraindications. It's a reason for careful evaluation, not an automatic no.

Mania or hypomania matters in anyone with a bipolar diagnosis or a suspected one, and it affects both whether to treat and how.

Substance use is assessed seriously, particularly involving ketamine or other dissociative drugs, because the treatment itself has abuse potential.

Suicidality cuts both ways. Acute suicidal ideation is part of one Spravato indication, so it isn't automatically disqualifying. It does change the level of care and monitoring required.

Diagnostic uncertainty and the ability to take part safely round it out. Treatment involves altered perception, a recovery period, and follow-up appointments. A provider will consider whether someone can engage with that safely.

Are You a Candidate for Spravato?

Spravato is the one place with a clear, published answer, because it has labeled indications.

It's approved for adults in two situations:

Treatment-resistant depression, used either as monotherapy or together with an oral antidepressant.
Depressive symptoms in adults with major depressive disorder who have acute suicidal ideation or behavior, used together with an oral antidepressant.

Safety and effectiveness haven't been established in patients under 18, so it's an adult treatment.

There are firm exclusions. Spravato is contraindicated in people with aneurysmal vascular disease, an arteriovenous malformation, or a history of bleeding in the brain, and in anyone hypersensitive to esketamine or ketamine. Its labeling also says it isn't recommended during pregnancy. Our companion guide on who shouldn't get ketamine therapy works through those exclusions, and separates the formal contraindications from cautions that only call for a closer look.

Candidacy for Spravato includes something beyond your medical history: whether you can work within how it's delivered. It's given under the direct supervision of a healthcare provider in a certified setting, never taken home. You're observed for at least two hours after each dose. You can't drive until the next day, after a restful sleep, so you'll need transportation arranged.

For some people those requirements are the deciding factor, and that's a legitimate part of the conversation. You can browse Spravato treatment centers in our directory, and our comparison of IV ketamine and Spravato covers how the two differ.

Are You a Candidate for IV or IM Ketamine?

Here the answer is less tidy, and anyone who tells you otherwise is overselling.

Psychiatric IV and IM ketamine are off-label. There's no labeled psychiatric indication, which means there's no federal eligibility standard to point at. Professional groups have published consensus guidance, including recent interdisciplinary guidelines for intravenous ketamine in depressive disorders, but guidance isn't the same as a regulatory rule.

In practice, clinics vary on:

Which diagnoses they'll treat
Whether prior treatment failures are required
Which medical histories they exclude
Age limits
Monitoring protocols and session length

The decision belongs to the clinician treating you. That's not a dodge. It's the actual structure of off-label practice, and it's why the quality of the individual clinic matters so much. You can browse ketamine infusion clinics by location.

Practical Factors Can Affect Candidacy Too

These aren't medical questions, but they shape whether a treatment plan is realistic.

Attending repeated appointments. Induction usually means several visits over a few weeks, not one.
Getting home afterward. You won't be driving yourself.
Avoiding driving for the rest of the day, which affects work schedules.
Support at home, which some clinics prefer for early sessions.
Taking part in follow-up, since response is assessed over time.
Cost and insurance. Spravato is often covered with prior authorization, while off-label ketamine is usually self-pay.
Realistic expectations about what treatment can and can't do.

To be clear about something: not having a ride, or not being able to afford a course of treatment, doesn't make anyone medically unsuitable. These are planning problems, and some have solutions worth raising with a clinic rather than treating as a closed door.

What Happens During a Ketamine Candidacy Evaluation?

Evaluations vary, but most cover similar ground.

Diagnosis and current symptoms, including severity and duration
Previous treatments, what worked, what didn't, and what you couldn't tolerate
A full medication review, including supplements and occasional medications
Medical history, with attention to cardiovascular and blood pressure issues
Psychiatric history, including any psychosis, mania, or prior hospitalization
Substance use history
Your treatment goals
A discussion of risks, benefits, and alternatives
Selecting a treatment type, if treatment is appropriate at all

Depending on what turns up, a clinic might ask for records from a current provider, blood pressure readings, lab work, or clearance from another specialist. There's no standard test panel that every clinic runs, so expect some variation.

Bring your medication list and a rough treatment history. It makes the appointment considerably more useful.

Signs a Clinic Is Screening Patients Carefully

How a clinic evaluates you tells you a lot about how it will treat you.

Encouraging signs include a detailed medical intake rather than a short form, a genuine medication review, a psychiatric assessment by someone qualified to do one, and direct questions about substance use. A careful clinic explains risks and alternatives instead of only benefits, checks your blood pressure, and can describe its monitoring clearly.

The strongest signal is harder to advertise: a willingness to say no. A clinic that treats everyone who inquires isn't screening. Being told that ketamine isn't the right fit, or not the right fit yet, is a sign the evaluation meant something.

Our guide to choosing a ketamine clinic covers what else to look for.

How to Find Out if Ketamine Treatment Is Appropriate for You

No article can tell you whether you're a candidate, including this one. That answer needs someone who can review your history, your medications, and your current symptoms.

What you can do is arrive prepared. Know what you've tried, what happened, what you're taking now, and what you want treatment to change.

Where you start depends on what you're weighing. If the labeled indications and insurance coverage matter most, look at Spravato treatment centers. If you're considering off-label infusions, ketamine infusion clinics lists those separately. If you'd rather just see what's within reach, search by location. And if depression is the reason you're here, our guide to ketamine therapy for depression is a useful next read.

A consultation isn't a commitment. It's how you find out.