In my years of clinical practice, not just in our ketamine clinic, I’ve learned how important it is to ensure safety with every treatment. While I’ve witnessed ketamine therapy create transformational outcomes for many of our Livemore patients struggling with treatment-resistant depression, anxiety, PTSD, and chronic pain, I also know that not everyone is a candidate. And that’s not a failure of the treatment; that’s just how good medicine works.
When patients ask me about ketamine therapy, I always start with safety. So, what does make ketamine contraindicated for certain individuals? What conditions or situations mean we need to say “not right now” or “not ever”? These are the questions I’ll address directly in this post.
My goal isn’t to discourage you from exploring ketamine therapy. It’s to help you understand the screening process and why it matters. Because when ketamine is appropriate, it can be remarkable. And when it’s not appropriate for you, pursuing it anyway can cause real harm.
Contraindication Types
Before we get into specifics, let’s clarify some language that often gets muddled in online discussions.
An absolute contraindication means a treatment should not be given under any circumstances. The risk of serious harm is too high. Period. Full stop. There’s no dosage adjustment or workaround that makes it acceptable.
A relative contraindication means the treatment carries increased risk, but it may still be appropriate under certain conditions. This is where clinical judgment matters. It requires a thorough evaluation, potentially consulting other specialists, and making an informed decision together.
Understanding this distinction matters because medicine isn’t black and white. A condition that disqualifies you at one clinic might be carefully managed at another with proper protocols. That said, absolute contraindications remain absolute everywhere. Anyone who tells you otherwise is practicing dangerous medicine.
Absolute Contraindications (Conditions When Ketamine Should Not Be Used)
The contraindications below are the deal-breakers. If any of these apply to you, ketamine therapy is not appropriate, regardless of how much you might want it or how treatment-resistant your depression has been.
Active Psychosis or Psychotic Disorders
Ketamine affects the brain’s glutamate system and can produce dissociative effects. For someone already experiencing psychosis or with conditions like schizophrenia, this can be destabilizing and potentially dangerous.
The dissociative properties that help some patients gain therapeutic distance from their suffering can worsen reality distortion in psychotic disorders. I’ve had patients referred to me, who were told by other providers that their history of schizophrenia “might be okay.” It’s not. This is a firm line.
If you have schizoaffective disorder, active schizophrenia, or are currently experiencing psychotic symptoms, ketamine is contraindicated. This is for patient safety.
Uncontrolled Hypertension
Ketamine typically causes a temporary increase in blood pressure and heart rate. In a healthy individual with normal blood pressure, this is manageable and monitored throughout treatment. In someone with uncontrolled hypertension, this increase could trigger a hypertensive crisis, stroke, or cardiac event.
Note the word “uncontrolled.” If your blood pressure is well-managed with medication and consistently within normal ranges, you may still be a candidate. But if you’re walking around with systolic pressures above 180 or diastolic above 120, or if your hypertension is poorly controlled despite treatment, ketamine is too risky.
We check blood pressure before every session at our Livermore clinic. If it’s elevated, we don’t proceed. It’s simple as that.
Unstable Cardiovascular Disease
For similar reasons to high blood pressure, patients with unstable angina, recent heart attack, heart failure, or significant arrhythmias should not receive ketamine. The cardiovascular stimulation isn’t worth the risk when your heart is already compromised.
Recent cardiac events typically require at least several months of stability before we’d even consider discussing ketamine, and even then, it often remains inadvisable.
Untreated Hyperthyroidism
Thyroid hormone excess already puts stress on the cardiovascular system. Adding ketamine’s sympathomimetic effects to an already overstimulated system is asking for trouble. If you have untreated or poorly controlled hyperthyroidism, get that managed first.
Increased Intracranial Pressure (ICP)
While some older literature suggested ketamine increased intracranial pressure (ICP), more recent research has complicated this picture. However, in patients with known elevated ICP from conditions like brain tumors, hydrocephalus, or recent head trauma, ketamine remains contraindicated until the underlying condition is addressed.
Pregnancy and Breastfeeding
We don’t have enough safety data on ketamine during pregnancy and breastfeeding. Until we do, it’s contraindicated. We avoid it. The developing brain is extraordinarily sensitive, and introducing a dissociative anesthetic isn’t a risk most physicians are comfortable taking without compelling data.
Known Allergy to Ketamine
This sounds obvious, but it needs to be listed here. True ketamine allergies are rare, but they exist. If you’ve had an allergic reaction to ketamine in a previous surgical or medical setting, you cannot receive ketamine therapy.
Relative Contraindications (Conditions Requiring Careful Evaluation First)
These conditions don’t automatically disqualify you, but they require thoughtful assessment and sometimes additional precautions.
History of Substance Use Disorder
This is nuanced. Ketamine does have abuse potential; it’s a controlled substance for a reason. But a history of substance use disorder doesn’t automatically mean ketamine therapy is off the table.
What matters is stability. How long have you been in recovery? What substances did you use? Are you actively engaged in treatment or support systems? Do you have a history specifically with dissociatives or ketamine?
In my clinical experience, many patients with past substance use disorders can safely benefit from supervised ketamine therapy. The key is the “supervised” part. We’re not sending you home with ketamine. You’re receiving treatment in a controlled medical setting with monitoring.
That said, active substance use, particularly of other dissociatives or stimulants, is a different story. Active addiction needs to be addressed before ketamine therapy is appropriate.
Certain Psychiatric Medications
Some medications interact with ketamine in ways that require attention. MAOIs (monoamine oxidase inhibitors), though rarely prescribed today, can intensify ketamine’s effects and pose cardiovascular risks. Benzodiazepines may reduce ketamine’s antidepressant efficacy. Lamotrigine may similarly interfere with the glutamate mechanisms we’re trying to leverage. (Note: This isn’t a full list; these are just a few examples.)
This doesn’t necessarily mean you can’t receive ketamine if you’re on a psychiatric medication. It simply means we need to discuss your full medication list, consider timing, and potentially coordinate with your prescribing psychiatrist.
Never stop medications on your own to “prepare” for ketamine therapy. That decision needs to be made carefully with your providers.
Glaucoma
Ketamine can increase intraocular pressure. For patients with glaucoma, particularly uncontrolled narrow-angle glaucoma, this presents a risk. If you have glaucoma that’s well-managed, we’d want to coordinate with your ophthalmologist before proceeding.
Liver Disease
Ketamine is metabolized by the liver. Severe liver impairment can affect how your body processes the medication, potentially leading to prolonged effects or accumulation with repeated doses. Mild liver disease may be manageable, but significant cirrhosis or liver failure is typically a contraindication.
History of Mania or Bipolar Disorder
This one requires careful discussion. Ketamine can potentially trigger manic episodes in individuals with bipolar disorder, particularly Bipolar I. However, research also suggests ketamine can help with bipolar depression when appropriately administered.
If you have bipolar disorder, I want to know your history of manic episodes, how they’ve been triggered in the past, and whether your condition is currently stable. None of this means you can’t receive ketamine therapy, it simply means we need to be careful and have a thorough discussion and evaluation.
The Screening Process at a Reputable Ketamine Clinic
A legitimate ketamine clinic will put you through a thorough screening process. If a provider offers ketamine after a five-minute phone call or an online questionnaire, run. That’s a liability waiting to happen.
Here’s what comprehensive screening looks like at Mind Balance Flow and what you should expect from any reputable Bay Area ketamine provider:
Complete Medical History Review
We review your entire medical history, not just your mental health concerns. Cardiovascular health, liver function, thyroid status, pregnancy potential, and every other relevant system. This is how we identify contraindications.
Psychiatric History and Current Treatment
What medications are you on? What have you tried? What’s your diagnosis, and who made it? Do you have a current psychiatrist or therapist? Understanding your mental health context helps us determine if ketamine is appropriate and how to integrate it with your existing care.
Physical Examination and Vital Signs
Blood pressure, heart rate, and a targeted physical exam are non-negotiable. At our Livermore clinic, we check vitals at every visit, not just the first one.
Discussion of Goals and Expectations
Ketamine isn’t a magic bullet. Understanding your expectations helps us set realistic goals and identify whether ketamine is the right tool for what you’re trying to achieve.
Coordination with Other Providers
If you have a psychiatrist, therapist, or relevant specialist, we may want to communicate with them. Good medicine doesn’t happen in silos, especially in the Tri-Valley where we have the privilege of excellent specialist networks.
What Happens If You’re Not a Candidate?
If we determine that ketamine is contraindicated for you, don’t worry, that’s not the end of your healing journey. It’s information that helps us find what is appropriate.
Sometimes contraindications are temporary. Uncontrolled blood pressure can be controlled. Substance use disorders can achieve stable recovery. Pregnancy ends.
Sometimes contraindications are permanent, and if that’s the case, we’ll help help you explore other options. Newer treatments are constantly emerging, and traditional options are often underutilized. The goal is finding what safely works for you.
Moving Forward Safely
If you’re considering ketamine therapy and wondering whether you might be a candidate, the only way to know for sure is through a proper medical evaluation. Reading this article is a good start. It’s not a substitute for a consultation with a physician who can review your specific situation.
At Mind Balance Flow, we offer free consultations for exactly this reason. Whether you’re in Livermore, Pleasanton, Dublin, or anywhere else in the East Bay, I’d rather have a conversation and tell you ketamine isn’t right for you than have you pursue treatment somewhere that skips the safety steps.
First step: schedule a consultation. Let’s figure out together what’s safe and appropriate for your situation.
Remember: The goal is your well-being. Ketamine is just one tool, and sometimes it’s the right one, and sometimes it’s not. Either way, we’ll figure it out honestly.
Sources
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- Andrade C. Ketamine for Depression, 4: In What Dose, at What Rate, by What Route, for How Long, and at What Frequency? Journal of Clinical Psychiatry. 2017;78(7):e852-e857. doi:10.4088/JCP.17f11738
- Zanos P, Moaddel R, Morris PJ, et al. Ketamine and Ketamine Metabolite Pharmacology: Insights into Therapeutic Mechanisms. Pharmacological Reviews. 2018;70(3):621-660. doi:10.1124/pr.117.015198
- Fond G, Loundou A, Rabu C, et al. Ketamine administration in depressive disorders: a systematic review and meta-analysis. Psychopharmacology. 2014;231(18):3663-3676. doi:10.1007/s00213-014-3664-5
- Short B, Fong J, Galvez V, Shelker W, Loo CK. Side-effects associated with ketamine use in depression: a systematic review. Lancet Psychiatry. 2018;5(1):65-78. doi:10.1016/S2215-0366(17)30272-9
- Wilkinson ST, Ballard ED, Bloch MH, et al. The Effect of a Single Dose of Intravenous Ketamine on Suicidal Ideation: A Systematic Review and Individual Participant Data Meta-Analysis. American Journal of Psychiatry. 2018;175(2):150-158. doi:10.1176/appi.ajp.2017.17040472
