Depression does not always respond to the first treatment. Some people improve with therapy, antidepressant medication, or a combination of approaches, while others continue to experience significant symptoms despite trying several treatments.

For people in this situation, a ketamine infusion may be one treatment option worth discussing with a qualified mental health professional.

But ketamine is not automatically recommended for everyone with depression. So when is a ketamine infusion actually considered?

The answer depends on factors such as previous treatments, symptom severity, medical history, diagnosis, and how an individual has responded to conventional treatment.

What Is a Ketamine Infusion?

Ketamine is a medication that has been used medically for decades, primarily as an anesthetic. Researchers later began studying its potential antidepressant effects, particularly in people with treatment-resistant depression.

A ketamine infusion involves administering ketamine intravenously in a controlled clinical setting. During treatment, patients are monitored by healthcare professionals because ketamine can temporarily affect blood pressure, perception, alertness, and awareness.

When ketamine is used for depression in the United States, IV treatment is considered an off-label use. It is different from Spravato, which contains esketamine and has specific FDA-approved indications for certain patients with treatment-resistant depression.

When Is Ketamine Infusion Considered?

A ketamine infusion may be considered when traditional depression treatments have not provided sufficient improvement.

This is particularly relevant for people with treatment-resistant depression, a term generally used when depressive symptoms persist despite adequate attempts with conventional treatments.

There is no single treatment history that applies to every patient. A clinician may consider factors such as:

• Previous antidepressant medications

• The dose and duration of previous treatments

• Response to psychotherapy

• Severity and duration of depressive symptoms

• Previous treatment side effects

• Current medications and medical conditions

• Psychiatric history

• Overall treatment goals

The goal of an evaluation is not simply to determine whether a patient wants ketamine. It is to determine whether the potential benefits and risks make sense for that particular person.

Why Consider Ketamine After Other Treatments?

One reason ketamine has attracted attention is its different mechanism of action.

Many traditional antidepressants primarily affect neurotransmitter systems such as serotonin and norepinephrine. Ketamine works differently, affecting the brain's glutamate system through NMDA receptors.

Research suggests that this mechanism may contribute to changes in neural signaling and neuroplasticity.

Another important feature is the potential speed of its antidepressant effects.

Some clinical studies have found improvements in depressive symptoms within a relatively short period following IV ketamine treatment in people with treatment-resistant depression.

For example, a randomized controlled trial published in the American Journal of Psychiatry found greater improvement in depressive symptoms 24 hours after ketamine compared with an active placebo in patients with treatment-resistant major depression.

However, this does not mean ketamine works immediately for everyone or that one infusion guarantees improvement.

What Does the Research Say?

The evidence surrounding ketamine and depression is promising, but it is important to look at the research realistically.

A randomized controlled trial examining repeated ketamine infusions found that repeated treatment produced cumulative antidepressant effects in patients with treatment-resistant depression. In that study, 59% of participants met the study's response criteria after repeated infusions.

At the same time, research does not show that every ketamine treatment schedule produces the same results. A more recent randomized controlled pilot study found no significant antidepressant advantage over an active placebo for a particular three-day IV treatment schedule, highlighting the need for further research into optimal dosing and treatment schedules.

This is an important point for patients: ketamine is a promising treatment option, not a guaranteed solution.

Does Everyone With Depression Qualify?

No.

Having depression alone does not automatically make someone a candidate for ketamine infusion therapy.

A qualified clinician should review the patient's medical and psychiatric history before treatment.

Depending on the circumstances, providers may consider factors such as blood pressure, cardiovascular health, current medications, substance use history, previous psychiatric diagnoses, and other medical conditions.

The evaluation also provides an opportunity to discuss realistic expectations.

A responsible provider should explain why ketamine is being considered, what potential benefits and risks exist, how treatment will be monitored, and what alternatives may be available.

What About People Who Have Tried Only One Antidepressant?

Ketamine is generally not something a person should pursue simply because their first antidepressant did not work.

Depression treatment often involves finding the right medication, dose, duration, or combination of treatments. Psychotherapy can also play an important role.

If someone has experienced limited improvement from one treatment, their healthcare provider may have several other options to consider before or alongside ketamine.

The appropriate treatment pathway is individual.

This is why a comprehensive evaluation is more useful than making a decision based solely on an online article, advertisement, or another person's experience.

Ketamine Infusion vs. Spravato

Patients researching ketamine may also encounter Spravato.

Although the treatments are related, they are not the same.

IV ketamine is administered through an intravenous infusion and is used off-label for depression.

Spravato contains esketamine and is administered as a nasal spray. It has FDA-approved indications for certain adults with treatment-resistant depression.

Spravato also has specific monitoring requirements because of potential effects such as sedation, dissociation, and impaired attention or judgment.

A qualified provider can explain the differences and determine whether either approach may be appropriate.

What Should You Ask Before Considering Treatment?

If you are considering a ketamine infusion for depression, asking the right questions can help you make an informed decision.

Consider asking your healthcare provider:

Why are you recommending ketamine for me?

Understanding the reasoning behind the recommendation is important.

What treatments should I try first?

There may be conventional treatment options that have not yet been explored.

What results can I realistically expect?

Avoid providers who promise guaranteed results.

How will you monitor my treatment?

Ketamine should be administered in an appropriate clinical environment with suitable monitoring.

What happens if ketamine does not help?

A good treatment plan should include reassessment and alternative options.

The Bottom Line

A ketamine infusion may be considered for depression when conventional treatments have not provided adequate relief, particularly in people experiencing treatment-resistant depression.

Research suggests that IV ketamine can have relatively rapid antidepressant effects in some patients, but responses vary and questions remain about the best long-term treatment strategies.

Ketamine should therefore be approached as a medical treatment rather than a quick fix.

If you are considering ketamine treatment in the Dallas-Fort Worth area, NeuroGlow provides medically supervised ketamine and Spravato treatment options following an appropriate clinical evaluation.

For readers interested in the research behind ketamine and treatment-resistant depression, this randomized controlled trial published in the American Journal of Psychiatry provides a useful starting point.

Buzzingabout is another place to explore additional information and resources related to this topic.

Ultimately, whether ketamine is appropriate depends on the individual. If depression has continued despite previous treatment, speaking with a qualified mental health professional can help you understand your options and determine what approach makes sense for your situation.

Medical disclaimer: This article is intended for educational purposes only and does not constitute medical advice, diagnosis, or treatment. IV ketamine for depression is an off-label use in the United States. Treatment decisions should be made with a qualified healthcare professional based on an individual's medical and mental health history.