Depression that does not respond to standard antidepressants leaves many people searching for other paths to relief. Treatment-resistant depression affects nearly three million people in the United States. Interest in faster, more effective options has grown along with it. Two treatments come up again and again in that search: ketamine and esketamine. The esketamine vs ketamine question sounds simple on the surface. However, the two medications work differently and fit different situations. Below, we break down what sets them apart so you can have a more informed conversation with your provider.

What Is Treatment-Resistant Depression?

Treatment-resistant depression is generally diagnosed when someone has tried at least two different antidepressants without lasting relief. Standard medications target serotonin and norepinephrine, and for many people that approach works well over time. For a meaningful share of patients, though, symptoms persist no matter how many combinations a provider tries. 

Researchers started looking for other options in the early 2000s. Early studies suggested that ketamine could ease depression symptoms within hours instead of weeks. In 2023, the NIMH reported on some of the biology behind that effect, adding to a growing body of research. Those findings eventually led to the treatment options covered below.

What Is Ketamine?

Ketamine started out as a surgical anesthetic, and hospitals have used it safely since the 1970s. At much lower doses, it works differently. It acts on the brain’s glutamate system rather than the serotonin pathways that oral antidepressants target. The mechanism appears to help the brain form new neural connections. The process may explain why symptoms can ease within days instead of weeks. 

Most ketamine treatment for depression is given through an IV infusion. Sessions usually last about 40 minutes in a monitored clinical setting. Ketamine is not yet FDA-approved specifically for depression, so it is prescribed off-label, though it remains widely studied and generally well tolerated. Anyone comparing ketamine vs esketamine will notice this off-label status right away, since it shapes cost and access later on. Our ketamine therapy page walks through what a typical course of sessions looks like.

 

What Is Esketamine (Spravato)?

Esketamine, sold under the brand name Spravato, is a nasal spray the FDA approved specifically for treatment-resistant depression. It comes from ketamine but isolates just one part of its molecular structure. The change affects how it binds to receptors in the brain. According to NAMI, Spravato is administered in a certified setting, where a provider monitors patients for about 2 hours after each dose. 

Spravato treatment for depression sessions typically happen twice a week for the first month, then taper to less frequent visits. One clear difference between esketamine and ketamine is that Spravato follows an FDA-approved dosing schedule. Ketamine plans, by comparison, vary more from provider to provider. 

Esketamine vs Ketamine: Key Differences

When people compare ketamine vs esketamine, the biggest difference comes down to chemistry. Ketamine is a mixture of two mirror-image molecules. Esketamine isolates just one of them, giving it a more targeted effect on NMDA receptors. The difference shows up in how each medication gets administered. Ketamine typically requires an IV line and a longer infusion, while esketamine is a nasal spray given under supervision. 

Some research suggests ketamine may cause slightly more dissociation or a short-term rise in blood pressure. Both medications are still considered safe when given in a monitored setting. Neither option works instantly for everyone, and response varies from person to person. Looking at ketamine vs esketamine differences for depression treatment side by side can help you and your provider decide what fits.

Insurance Coverage and Cost Differences

Cost is often the deciding factor for people weighing esketamine vs ketamine, since insurance treats the two very differently. Esketamine is FDA-approved for treatment-resistant depression. So, most insurance plans, including Medicare, cover it once someone has tried two antidepressants without success. 

Ketamine, by contrast, is still considered an off-label treatment for depression. Insurance rarely covers the infusions themselves as a result. Many ketamine providers offer a superbill that patients can submit for possible partial reimbursement. HSA or FSA funds can often be used instead. The difference between esketamine and ketamine does not mean one treatment works better than the other. It mostly means access and out-of-pocket costs can look very different depending on the path you choose.

Choosing Between Spravato and Ketamine for Depression

Deciding between the two treatments usually comes down to a conversation with a psychiatric provider. The provider can review your history and goals with you. Some people respond well to the steady, standardized schedule that Spravato offers. Others prefer the flexibility of an infusion-based ketamine plan. 

A thorough evaluation plays a large role in choosing, including how many antidepressants you already tried. For some patients, one treatment gets tried before the other. For others, a provider may recommend one directly based on medical history. Either way, that decision works best when a provider who understands both options is guiding it. Our Spravato treatment center page outlines what that evaluation process looks like from the first visit onward.

Find Spravato and Ketamine Therapy Today

Depression that has not responded to standard treatment does not mean you have run out of options. Psychiatric Pathways offers both treatments for adults facing treatment-resistant depression. We work with loved ones who are helping someone through it too. Whether the esketamine vs ketamine decision feels overwhelming or you already have a preference in mind, our team can walk you through what to expect. Contact us to schedule a consultation and find the option that fits your situation.

FAQs About Ketamine vs Esketamine Differences for Depression Treatment

Here are a few common questions people ask about Spravato and ketamine once they start looking into treatment. These answers cover what usually comes up after the basics.

If one treatment doesn’t work, can I switch to the other?

Yes, switching between ketamine and esketamine is common when the first option does not bring enough relief. Your provider will usually reassess your symptoms and history before recommending a change.

Do I have to stop my current antidepressant to start ketamine or Spravato?

In most cases, no. Both treatments are often used alongside an existing antidepressant rather than as a full replacement, though your provider will confirm what makes sense for your medications.

How soon will I notice a difference after starting treatment?

Many people notice some change within the first one to three sessions, though timelines vary by individual. Full results typically take shape over several weeks.

Is one treatment considered safer for long-term use?

Both are considered safe when monitored by a trained provider. Esketamine’s FDA-approved dosing schedule provides more long-term safety data, while ketamine’s long-term profile is still being studied.

Will my insurance require me to try one treatment before the other?

Some insurance plans require documented antidepressant trials before covering esketamine, but that requirement comes from the medication’s FDA approval, not from ketamine treatment. Your provider or insurance company can confirm what your plan requires.