If you are considering ketamine therapy for depression, anxiety, or chronic pain, the question of safety is probably near the top of your mind. It should be. Asking whether a treatment is safe before you try it is not a sign of hesitation. It is a sign of good judgment.
We want to address that question directly, with the same honesty we would bring to a conversation in our clinic. There are real things to know about ketamine side effects, the difference between clinical and recreational use, and the safeguards that matter most. Here is what the evidence says, and what we do to keep our patients safe.
Is Ketamine Safe When Administered in a Clinical Setting?
Ketamine has one of the longest safety records of any medication still in active clinical use. It was first synthesized in 1962, approved by the FDA as an anesthetic in 1970, and has been used in operating rooms, emergency departments, and field hospitals around the world ever since. The World Health Organization includes ketamine on its List of Essential Medicines, a designation reserved for the medications considered most important to a functioning health system.
For more than fifty years, anesthesiologists and CRNAs have administered ketamine to millions of patients across a wide range of ages and medical conditions. That depth of experience means the medication's pharmacology, its effects on the body, and its safety boundaries are exceptionally well understood.
When ketamine is used for mental health or pain conditions, the doses are significantly lower than those used in surgery, typically a fraction of what would be needed for anesthesia. At these sub-anesthetic doses, the safety margin is wide, and serious adverse events are rare when treatment is delivered by a trained provider with proper monitoring.
This is not a new or experimental medication. It is one of the most studied drugs in the history of medicine, now being applied in a new context with strong and growing evidence behind it. For more on how the FDA views ketamine therapy, we have written a separate overview.
What Are the Common Side Effects?
Like any medical treatment, ketamine does have side effects. The important thing to understand is that the most common ones are temporary, predictable, and manageable. They are not a sign that something has gone wrong. They are expected parts of how the medication works.
During an infusion, patients may experience:
- Mild nausea. This is one of the more common ketamine side effects. When it occurs, it tends to be gentle rather than severe, and it can be managed with anti-nausea medication administered during the session
- Dizziness or lightheadedness. Some patients feel a sense of floating or mild unsteadiness during the infusion. This is related to ketamine's effect on the nervous system and resolves as the medication clears
- Dissociation. A temporary feeling of being detached from your surroundings, sometimes described as dreamlike awareness. Many patients actually find this aspect of the experience calming or reflective. It passes within the session or shortly after
- Changes in perception. Some patients notice shifts in how light, sound, or time feel during the infusion. These are mild and transient
These effects typically resolve within one to two hours after the infusion ends. By the time you leave the clinic, most patients feel clear-headed, though we always require that someone else drives you home.
In rare cases, patients may experience a temporary increase in blood pressure or heart rate during the infusion. This is why continuous vital sign monitoring matters, and why having a CRNA present throughout the session is not optional at our clinic. It is standard practice.
What About Long-Term Risks?
This is where much of the confusion around ketamine safety originates, and where the distinction between clinical use and recreational use becomes essential.
You may have seen reports linking ketamine to bladder damage, cognitive impairment, or dependence. Those reports are real, but they come from studies of chronic recreational users who consume very high doses, often daily, over months or years. The pattern of use in those cases bears no resemblance to clinical ketamine therapy.
The doses we use in a clinical setting are carefully controlled and administered on a structured schedule. It is a fundamentally different situation from unsupervised recreational use. — Marla Peterson, CRNA, Music City Ketamine
Here is what the research tells us about clinical ketamine therapy at therapeutic doses:
- Bladder health. The bladder problems associated with ketamine, sometimes called ketamine cystitis, have been documented in individuals using large amounts recreationally over extended periods. Published studies on clinical ketamine therapy at sub-anesthetic doses have not shown evidence of bladder damage
- Cognitive function. Research on patients receiving therapeutic ketamine has not demonstrated lasting cognitive impairment. Some studies suggest that by alleviating depression, ketamine may actually help restore cognitive clarity that the illness had diminished
- Dependence potential. While ketamine does have abuse potential in uncontrolled settings, the structured clinical protocol, controlled dosing, and medical oversight used in therapeutic settings significantly mitigate this risk. Patients receiving treatment on a clinical schedule are not at meaningful risk for the kind of dependence seen in recreational contexts
We take a careful approach to ongoing care. If a patient's treatment plan evolves, we reassess rather than simply continuing indefinitely. Monitoring is part of the process, not an afterthought.
How Does MCK Ensure Patient Safety?
Safety at Music City Ketamine is not a talking point. It is built into every part of how we operate. Here is what that looks like in practice:
- CRNA with 20+ years of experience. Every infusion is administered and monitored by Marla Peterson, CRNA. Her background in anesthesia means she has extensive training in airway management, hemodynamic monitoring, and pharmacology. She has worked with ketamine throughout her career
- Hospital-grade monitoring. Throughout your session, we track your blood pressure, heart rate, oxygen saturation, and other vital signs using the same caliber of equipment found in hospital settings. If anything needs attention, it is caught immediately
- One patient at a time. We do not run multiple infusions simultaneously. When you are in our clinic, you have our full and undivided attention. This is a deliberate choice that reflects how we believe ketamine therapy should be delivered
- Comprehensive screening protocols. Before your first treatment, we conduct a thorough medical and psychological evaluation. We review your health history, current medications, and any conditions that might affect how you respond to ketamine. This screening process is how we catch contraindications before they become concerns
- Physician oversight. Our treatment protocols are developed and maintained under physician supervision, ensuring that every aspect of your care meets the highest clinical standards
We believe the question of whether ketamine therapy is safe depends less on the medication itself and more on who is administering it, how it is monitored, and whether the right screening has been done. Those are the variables that matter, and they are the variables we control carefully. Learn more on our FAQ page.
Who Should NOT Receive Ketamine Therapy?
Ketamine is not appropriate for everyone, and responsible providers are transparent about that. There are specific medical conditions and circumstances that make ketamine therapy inadvisable. Our screening process is designed to identify these before treatment begins.
Ketamine therapy is generally not recommended for individuals with:
- Uncontrolled hypertension. Because ketamine can cause a temporary increase in blood pressure, patients whose blood pressure is not well managed are at elevated risk during the infusion. If hypertension is controlled with medication, ketamine may still be an option, but this requires careful evaluation
- Active psychosis or certain psychotic disorders. Ketamine's dissociative properties could potentially worsen symptoms in individuals experiencing active psychosis. Conditions such as unmanaged schizophrenia or schizoaffective disorder are typically considered contraindications
- Pregnancy. There is insufficient data on the effects of ketamine on fetal development, and we err on the side of caution. Ketamine therapy is not offered to patients who are pregnant
Other factors we evaluate during screening include a history of substance use disorder, certain cardiac conditions, and current medications that might interact with ketamine. If we determine that ketamine is not the right fit, we will tell you directly and, when possible, suggest alternative directions to explore with your care team.
The screening process is not a formality. It is one of the most important safety measures we have.