How Does IV Ketamine Infusion Therapy Work?
IV ketamine infusion therapy uses a low dose of ketamine administered directly into a vein in a medically monitored setting. Ketamine has long been used in anesthesiology, and researchers have also studied lower-dose IV ketamine for conditions including treatment-resistant depression and certain chronic pain conditions.
Unlike many traditional antidepressants, which primarily affect serotonin and other monoamine systems, ketamine interacts with the brain’s glutamate system, including NMDA receptor signaling. Researchers continue to study exactly how these effects contribute to changes in mood, pain processing, and other symptoms.
At WOW Spine, ketamine therapy is provided as medically monitored IV infusions, rather than oral ketamine.
How Does IV Ketamine Work in the Brain?
Ketamine’s effects are complex and are still being studied.
One of its primary actions is blocking NMDA receptors, which are part of the brain’s glutamate signaling system. This can influence other pathways involved in communication between brain cells and may contribute to ketamine’s effects on mood and pain processing.
This mechanism is different from many traditional antidepressants, which primarily act on neurotransmitters such as serotonin and norepinephrine.
Researchers are continuing to investigate exactly how these changes translate into clinical benefits and why some patients respond differently than others.
How Is IV Ketamine Being Studied for Depression?
IV ketamine has been extensively studied in people with treatment-resistant depression, meaning depression that has not adequately improved after conventional treatments.
Research supported by the National Institute of Mental Health has found that IV ketamine can produce antidepressant effects more rapidly than traditional antidepressants in some patients with treatment-resistant depression. Traditional antidepressants often take several weeks to have their full effect, while improvement following ketamine has been observed much sooner in clinical studies.
Not every patient responds the same way, and the duration of benefit can vary. Ketamine treatment should therefore be individualized and monitored by an experienced medical provider.
For a deeper look at this topic, read our article on how IV ketamine infusion therapy may help depression.
Is IV Ketamine Used for Anxiety or PTSD?
Ketamine has also been studied for anxiety and post-traumatic stress disorder, but the evidence for these conditions is less established than the evidence surrounding treatment-resistant depression.
Research is ongoing, and ketamine should not be presented as a proven treatment or cure for every anxiety-related condition.
In particular, current VA/DoD clinical guidelines recommend against ketamine as a treatment specifically for PTSD because clinical trials have not demonstrated a sufficiently clear benefit when weighed against potential risks.
Patients experiencing anxiety, PTSD, depression, or overlapping symptoms should be evaluated individually to determine which treatment options are appropriate for their particular situation.
How Is IV Ketamine Given?
IV ketamine is administered directly into a vein, typically in the arm or hand, using a controlled infusion.
The dose, infusion time, and treatment plan depend on the condition being treated, the patient’s medical history, and their individual response.
During an infusion, patients should be appropriately monitored because ketamine can temporarily affect factors such as:
- Blood pressure and heart rate
- Awareness and perception
- Coordination and alertness
- Nausea or dizziness
- Dissociation or altered sensory experiences
Medical monitoring allows the treatment team to observe how the patient responds throughout the infusion and address side effects if they occur.
Why Does Medical Monitoring Matter During IV Ketamine Therapy?
Ketamine can cause changes in blood pressure, heart rate, sedation, and perception. The FDA has specifically emphasized the importance of appropriate medical monitoring when ketamine is used for psychiatric conditions.
Before treatment, patients should undergo a medical evaluation to determine whether ketamine may be appropriate and whether there are health conditions, medications, or other factors that could affect treatment.
At WOW Spine, every IV ketamine infusion is administered under medical supervision in a setting that meets th
Is IV Ketamine FDA-Approved for Depression?
Ketamine itself is FDA-approved as an anesthetic. When IV ketamine is prescribed for depression or another psychiatric condition, that use is considered off-label, meaning the medication is being used for an indication outside its FDA-approved labeling.
Off-label prescribing is a recognized part of medical practice when a physician determines it may be appropriate based on the available evidence and the individual patient’s needs.
This is different from esketamine (Spravato), a related medication administered as a nasal spray that has received FDA approval for certain depressive disorders.
Who May Be a Candidate for IV Ketamine Therapy?
Whether IV ketamine is appropriate depends on the individual patient and the condition being treated.
A medical evaluation may include discussion of:
- Your diagnosis and symptoms
- Treatments you’ve previously tried
- Current medications
- Medical and psychiatric history
- Cardiovascular health and other risk factors
- Your goals and expectations for treatment
Ketamine isn’t appropriate for everyone, and treatment decisions should be made with a qualified healthcare professional after reviewing the potential benefits and risks.
Learn More About IV Ketamine Infusion Therapy
If you’re considering ketamine, it can help to understand not only what the medication does, but how treatment is administered and monitored.
Dr. Mike Martinez is a double board-certified Anesthesiologist and Interventional Spine & Pain Management Specialist with experience in medically monitored IV ketamine therapy.
You can learn more about IV Ketamine Infusion Therapy at WOW Spine, including treatment, monitoring, and what to expect during an infusion.
