Ketamine Infusion Therapy in NYC: How It Works and Who It May Help

Medically Reviewed by: The Clinical Team at Ketamine Wellness NY

Last Updated: July 2026

Quick Answer

Ketamine infusion therapy is an evidence-based treatment that may help some people with treatment-resistant depression, anxiety disorders, post-traumatic stress disorder (PTSD) and certain chronic pain conditions when conventional treatments have not provided adequate relief.

Unlike traditional antidepressants, ketamine works primarily through the brain's glutamate system and may produce improvements more rapidly in carefully selected patients.

Treatment should always be delivered in a medically supervised setting following a comprehensive clinical assessment.

Key Takeaways

✔ Ketamine infusion therapy is usually considered after standard treatments have not provided sufficient improvement.

✔ It works differently from traditional antidepressants by targeting glutamate pathways involved in brain connectivity.

✔ Treatment is delivered through an intravenous (IV) infusion under continuous medical supervision.

✔ Some people experience improvements within hours or days, although responses vary and maintenance treatment may be required.

✔ Ketamine therapy should be part of a personalised treatment plan developed with qualified healthcare professionals.

Table of Contents

1. What Is Ketamine Infusion Therapy?

2. How Ketamine Works

3. Who May Benefit from Treatment?

4. Who May Not Be Suitable?

5. What Happens During a Ketamine Infusion?

6. Benefits and Limitations

7. Possible Side Effects

8. Choosing a Ketamine Clinic

9. Frequently Asked Questions

Understanding Ketamine Infusion Therapy

Living with depression, anxiety or chronic pain that has not improved despite multiple treatments can be physically and emotionally exhausting. For some people, medications, psychological therapy and lifestyle changes provide meaningful relief. For others, symptoms persist despite trying several evidence-based approaches.

If you're still unsure whether it's time to explore a different treatment approach, understanding the signs that professional support may be beneficial can help you make a more informed decision.

This is sometimes described as treatment-resistant depression, and it has prompted growing interest in newer therapies such as ketamine infusion treatment.

Originally developed as an anaesthetic, ketamine has been used safely in hospitals for decades. More recently, research has shown that carefully controlled, low-dose ketamine infusions may help improve symptoms of certain mental health conditions in appropriately selected patients.

Unlike oral antidepressants taken at home, ketamine infusion therapy is administered intravenously in a specialist clinic under continuous medical supervision. During treatment, healthcare professionals monitor blood pressure, heart rate and overall wellbeing throughout the infusion to ensure patient safety.

Although ketamine has shown encouraging results, it is not considered a first-line treatment and should be used as part of a comprehensive mental health care plan rather than as a standalone solution.

What does the evidence say? Clinical studies suggest that ketamine may produce rapid antidepressant effects in some people with treatment-resistant depression, often within hours or days rather than the several weeks typically associated with conventional antidepressants. Researchers believe these effects are related to changes in glutamate signalling and improved communication between brain cells, although ongoing treatment and psychological support remain important for many patients.

How Does Ketamine Work?

Most antidepressants work by influencing neurotransmitters such as serotonin or norepinephrine.

Ketamine works differently.

Its primary action involves the glutamate system, the brain's most abundant excitatory neurotransmitter network.

Researchers believe that prolonged stress and depression may disrupt communication between nerve cells, reducing the brain's ability to adapt and form healthy neural connections.

Ketamine appears to temporarily modify glutamate signalling, triggering a series of biological processes that promote synaptic plasticity—the brain's ability to strengthen existing neural pathways and form new connections.

Although scientists continue to study exactly how this process works, improved neural

connectivity is thought to contribute to the rapid improvements reported by some patients following treatment.

Why Can Ketamine Work More Quickly?

One of the most distinctive features of ketamine therapy is the speed at which some people notice changes.

Traditional antidepressants often require several weeks before meaningful improvements occur.

Ketamine may begin producing noticeable effects much sooner because it acts through a different biological pathway.

However, rapid improvement does not mean permanent recovery.

Many people require an initial course of several infusions followed by ongoing maintenance treatment, depending on their individual response and clinical assessment.

Expectations should always be realistic.

Ketamine is designed to support recovery—not provide an instant cure.

⭐ Expert Tip

Improvement often happens gradually

Some people notice positive changes after their first infusion, while others require several treatments before experiencing meaningful improvement. Progress may be subtle at first, such as improved sleep, reduced emotional distress or increased motivation, before larger changes in mood become noticeable.

Focusing on overall progress rather than expecting dramatic overnight results can help set realistic expectations throughout treatment.

Who May Benefit from Ketamine Infusion Therapy?

Ketamine infusion therapy is generally considered for people whose symptoms have not responded adequately to standard treatments.

After a comprehensive medical assessment, healthcare professionals may consider ketamine treatment for individuals living with:

Treatment-Resistant Depression

The strongest evidence currently supports the use of ketamine for treatment-resistant depression.

This generally refers to depression that has not improved sufficiently after trying two or

more appropriate antidepressant treatments.

Anxiety Disorders

Some studies suggest ketamine may help reduce symptoms associated with certain anxiety disorders, particularly when conventional treatments have been unsuccessful.

However, suitability varies considerably between individuals and should always be assessed by an experienced clinician.

Post-Traumatic Stress Disorder (PTSD)

Early research suggests ketamine may help reduce certain PTSD symptoms when used alongside psychological therapies and comprehensive mental health care.

It should not replace trauma-focused therapy but may complement broader treatment strategies in selected patients.

Chronic Pain Conditions

Ketamine has also been investigated for several chronic pain conditions, including:

• Complex Regional Pain Syndrome (CRPS)

• Fibromyalgia

• Neuropathic pain

• Certain persistent pain syndromes

Because chronic pain and mental health frequently influence one another, treatment plans often address both physical and psychological wellbeing.

Ketamine infusion therapy involves much more than the infusion itself. Careful assessment, medical supervision and ongoing follow-up all play important roles in supporting patient safety and treatment outcomes.

Who May Not Be Suitable for Ketamine Therapy?

Although ketamine infusion therapy may offer significant benefits for some people, it is not appropriate for everyone. A thorough medical assessment is essential to determine whether the treatment is safe and suitable.

Depending on your medical history, ketamine may not be recommended for people with:

• Uncontrolled high blood pressure

• Certain cardiovascular conditions

• A history of psychosis or active psychotic symptoms

• Some substance use disorders

• Certain medical conditions that increase the risks associated with ketamine

Your clinician will also review your current medications, previous mental health treatments and overall health before recommending treatment.

Being declined for ketamine therapy does not mean treatment has failed—it means your healthcare provider is prioritising your safety and exploring more appropriate options.

Careful patient selection is essential: Current clinical guidance emphasises that ketamine therapy should be delivered only after a comprehensive assessment by qualified healthcare professionals. Appropriate patient selection, medical supervision and follow-up are essential for maximising benefits while reducing potential risks.

What Happens During a Ketamine Infusion Session?

Understanding the treatment process often helps reduce anxiety before the first appointment.

Before Your Appointment

Your first visit usually begins with a detailed consultation.

The clinical team will discuss:

• Your medical history

• Previous mental health treatments

• Current medications

• Physical health

• Treatment goals

• Any questions or concerns you may have

This assessment helps determine whether ketamine infusion therapy is appropriate for your individual circumstances.

During the Infusion

Treatment takes place in a comfortable clinical setting under continuous medical supervision.

A small intravenous cannula is inserted into your arm before ketamine is delivered slowly over approximately 40 to 60 minutes.

Throughout the session, clinicians monitor:

• Blood pressure

• Heart rate

• Oxygen levels

• Overall wellbeing

Many patients describe the experience as calm, reflective or dream-like.

Some report temporary feelings of detachment from their surroundings, known as dissociation, which usually resolve shortly after treatment.

After Treatment

Once the infusion is complete, you will remain in the clinic until your healthcare team is

satisfied that you have recovered safely.

Because ketamine can temporarily affect attention and reaction times:

• You should not drive home.

• Arrange for someone to accompany you or collect you after treatment.

• Avoid making important decisions until the following day.

Some people notice improvements within hours, while others require several infusions before meaningful changes become apparent.

⭐ Expert Tip

Keep a recovery journal

Tracking your mood, sleep quality, anxiety levels and daily functioning between treatments can help both you and your clinician understand how you're responding. Improvements are sometimes gradual and easier to recognise when recorded over several weeks rather than judged day by day.

What Are the Potential Benefits?

For carefully selected patients, ketamine infusion therapy may provide several potential benefits.

These may include:

• Rapid improvement in depressive symptoms for some individuals

• Reduced anxiety

• Improved emotional resilience

• Better engagement with psychological therapy

• Improved quality of life

• Reduced severity of certain chronic pain symptoms

However, responses vary considerably.

Not everyone experiences the same level of improvement, and ongoing treatment may be necessary to maintain benefits.

Possible Side Effects and Risks

Like all medical treatments, ketamine infusion therapy carries potential risks and side effects.

Common temporary side effects include:

• Dizziness

• Nausea

• Mild increase in blood pressure

• Blurred vision

• Drowsiness

• Dissociation

• Headache

These effects usually resolve within a few hours after treatment.

Serious complications are uncommon when ketamine is administered in an appropriately equipped medical setting by experienced clinicians who monitor patients throughout treatment.

Discuss any concerns with your healthcare provider before starting therapy.

Choosing a Ketamine Clinic in NYC

The quality of the clinic you choose is an important part of your treatment experience.

When considering ketamine treatment NYC, look for a provider that offers:

• Comprehensive medical assessments

• Experienced clinical staff

• Continuous monitoring throughout treatment

• Clear emergency protocols

• Personalised treatment plans

• Ongoing follow-up and support

Rather than focusing solely on convenience or cost, choose a clinic that places patient safety, evidence-informed care and individualised treatment planning at the centre of its approach.

For people living in Queens or Long Island, accessing a local clinic can also make follow-up appointments and ongoing care more convenient.

Can Complementary Therapies Support Mental Wellbeing?

Ketamine infusion therapy is only one part of mental health care.

Many people also benefit from a broader wellbeing plan that may include psychotherapy, regular physical activity, healthy sleep habits, stress management and social support.

Depending on your individual needs, complementary therapies such as acupuncture, therapeutic massage or mindfulness-based practices may also help support overall wellbeing alongside evidence-based mental healthcare. These approaches should complement—not replace—treatment recommended by your medical or mental health team.

Some people are also interested in how complementary approaches can be integrated with conventional mental health care, particularly when managing anxiety symptoms alongside medically supervised treatment.

Continue Your Mental Wellbeing Journey

Mental health is influenced by many different factors, including physical health, lifestyle, stress, sleep and emotional resilience. Our Mental Wellbeing Hub brings together evidence-informed articles on anxiety, depression, stress management and complementary therapies to help you better understand your options and make informed decisions about your wellbeing.

Myth vs Fact

Myth

Ketamine infusion therapy cures depression after one treatment.

Fact

While some people notice rapid improvements, ketamine is not a cure. Many patients require a series of treatments and ongoing follow-up as part of a personalised mental health care plan.

Frequently Asked Questions

How quickly does ketamine therapy work?

Some people experience improvements within hours or days, while others require several treatments before noticing meaningful changes.

Is ketamine therapy safe?

When provided by qualified healthcare professionals in a medically supervised setting, ketamine therapy has been shown to have an acceptable safety profile for appropriately selected patients.

How many treatments will I need?

Most patients begin with a series of several infusions over two to three weeks, followed by maintenance treatment if clinically appropriate.

Can I continue taking my antidepressants?

Possibly. Your clinician will review your medications and advise whether any changes are necessary before treatment.

Is ketamine therapy suitable for everyone?

No. A comprehensive medical assessment is essential because certain medical or psychiatric conditions may make ketamine therapy unsuitable.

Final Thoughts

For people living with treatment-resistant depression, anxiety or certain chronic pain conditions, ketamine infusion therapy offers an evidence-informed treatment option that works differently from conventional antidepressants. Although it is not suitable for everyone and should never be viewed as a quick fix, carefully supervised ketamine treatment may help some individuals who have not found sufficient relief through other approaches.

Choosing an experienced clinical team, understanding both the potential benefits and limitations, and approaching treatment with realistic expectations are all important steps towards making an informed decision. If you are considering ketamine treatment NYC, a comprehensive consultation is the best way to determine whether this therapy is appropriate for your individual needs.

The A to Zen Difference

At A to Z Therapies, we believe informed decisions lead to better health outcomes. Our goal is to provide balanced, evidence-informed information that explains both the potential benefits and the limitations of different treatment options, helping you work with qualified healthcare professionals to choose the approach that best meets your individual needs.

References

1. Harvard Gazette. Ketamine Found Effective in Treatment-Resistant Depression. Published May 31, 2023. Discusses clinical trial findings comparing intravenous ketamine with electroconvulsive therapy (ECT) for treatment-resistant depression.

2. American Brain Foundation. The Brain and Stress. Explains how chronic stress affects brain function, emotional regulation and neural health.

3. Healthline. Ketamine for Anxiety: Uses, Benefits, Risks and Side Effects. Reviews current evidence, potential benefits, limitations and safety considerations of ketamine therapy for anxiety.

4. NHS. Complex Regional Pain Syndrome (CRPS). Provides evidence-based information on symptoms, diagnosis and treatment of CRPS.

5. PubMed Central. Current Evidence on Ketamine for Treatment-Resistant Depression. Peer-reviewed review examining the efficacy, safety and clinical considerations of ketamine therapy for treatment-resistant depression.

6. PubMed Central. Ketamine for Mood Disorders: Mechanisms, Clinical Evidence and Future Directions. Peer-reviewed review discussing ketamine's mechanisms of action, antidepressant effects and current clinical evidence.