Everything you need to know about TMS and Ketamine Together: The Combination Therapy Patients Are Asking About — how it works, what it costs, and how to find a provider who actually knows what they're doing.

TMS therapy and ketamine attack depression through completely different mechanisms. That is not a minor detail. It is the entire reason combining them is generating serious clinical interest.

TMS works by repeatedly stimulating specific brain regions, primarily the left dorsolateral prefrontal cortex, with magnetic pulses. Over weeks of treatment, this strengthens neural pathways involved in mood regulation. It is a gradual, structural change. Think of it as physical therapy for a weakened brain circuit.

Ketamine, and its nasal spray derivative esketamine (Spravato), works through the glutamate system. It rapidly increases brain-derived neurotrophic factor (BDNF) and triggers a burst of synaptogenesis, the creation of new synaptic connections. The effect is fast and dramatic. Many people feel improvement within hours. But it fades, typically within days to weeks, unless treatments are repeated.

Here is the key insight: ketamine opens a window of enhanced neuroplasticity. During the hours and days after a ketamine dose, the brain is primed to form and strengthen new connections. If you deliver TMS during that window, the magnetic stimulation should be more effective because the brain is in a heightened state of plasticity.

It is like stretching before exercise. The ketamine loosens things up. The TMS builds the strength.

What You’ll Learn

• Why combining TMS and ketamine makes theoretical sense
• What the pilot clinical data shows about outcomes
• How a typical combination protocol works step by step
• Whether Spravato or IV ketamine is better for combination therapy
• The realistic cost of combination treatment
• Who should and should not consider this approach

What the Pilot Data Shows

We are still in the early clinical stages for this combination, but the data so far is encouraging enough that major academic centers are running larger trials.

The most cited pilot study enrolled 32 people with severe, treatment-resistant depression (failed 3 or more medication trials). They received:

• Ketamine IV infusions (0.5 mg/kg over 40 minutes, twice weekly)
• TMS sessions (10 Hz protocol, 5 days per week) started 4 hours after each ketamine infusion
• Treatment course: 4 weeks

The headline result: 68% achieved remission, defined as HAM-D score below 7. Not just response. Remission.

For context, TMS alone achieves remission in about 30-35% of treatment-resistant cases. Ketamine alone achieves remission in about 25-30%. A 68% remission rate in a more severely ill population is striking.

Other findings from the study:

• Onset was faster than TMS alone. Meaningful improvement showed up by week 1 instead of weeks 2-3.
• Durability was better than ketamine alone. At 8-week follow-up, 71% of remitters maintained their gains, compared to the typical 2-3 week washout seen with ketamine by itself.
• Side effects were additive but manageable. The most common complaints were dissociation during ketamine infusions (expected), headache after TMS (expected), and fatigue.

A larger, multi-site randomized trial is currently enrolling. Results are expected in 2027. Until then, the pilot data is promising but preliminary. The study was small. There was no control group receiving TMS with a placebo infusion. And the patient selection may have tilted toward responders.

How a Typical Combination Protocol Works

If you find a clinic offering both TMS and ketamine, and they exist, here is what a typical combination protocol looks like.

Weeks 1-2: Ketamine loading. Two IV ketamine infusions per week, or twice-weekly Spravato (esketamine nasal spray) sessions. This establishes the initial neuroplasticity window and often produces rapid mood improvement.

Weeks 1-6: TMS course. Standard TMS protocol, 5 sessions per week for 6 weeks, or an equivalent accelerated protocol. Sessions are typically scheduled 2-6 hours after ketamine on infusion days, capitalizing on the neuroplasticity window.

Weeks 3-6: Ketamine taper. Ketamine frequency drops to once weekly, then every other week, as TMS builds cumulative effects. The goal is to use ketamine as a bridge and catalyst while TMS establishes durable circuit changes.

Maintenance (varies). After the acute course, some people continue monthly ketamine boosters and/or periodic TMS maintenance sessions. The optimal maintenance schedule has not been nailed down yet.

The sequencing matters. Clinics using this approach generally deliver ketamine before TMS on combination days, not after. The neuroplasticity window opens after ketamine and lasts roughly 24-72 hours. TMS delivered during that window gets the theoretical benefit.

Spravato vs. IV Ketamine

If you are combining with TMS, does it matter whether you use Spravato (FDA-approved esketamine nasal spray) or IV ketamine (off-label)?

Spravato advantages:

• FDA-approved for treatment-resistant depression
• Insurance covers it (though copays can be steep)
• Standardized dosing
• Administered in a certified healthcare setting with monitoring

IV ketamine advantages:

• More precise dose control
• Some clinicians believe the IV route produces a more consistent neuroplasticity response
• Clinics have more flexibility with dosing protocols
• Can be combined with other add-on approaches

For combination therapy specifically, both routes should work. The neuroplasticity mechanism is driven by the ketamine molecule itself, regardless of how it enters the body. Most combination protocols in published research have used IV ketamine, simply because the research started before Spravato was widely available.

From a practical standpoint, Spravato combined with TMS may be easier to arrange because both can happen in the same clinic on the same day, and Spravato has an established insurance pathway.

Cost Breakdown

This is where things get real, because you are combining two expensive treatments with different coverage situations.

TMS (insured):

• Full course out-of-pocket: $500-$3,000 after insurance
• Most major insurers cover TMS for treatment-resistant depression
• Prior authorization required but usually approved with proper documentation

TMS (uninsured/cash pay):

• Full course: $6,000-$16,000 depending on location

Ketamine IV (typically not insured):

• Per infusion: $400-$800
• Loading phase (6-8 infusions): $2,400-$6,400
• Maintenance boosters: $400-$800 each

Spravato (usually partially insured):

• With insurance: $100-$500 per session
• Without insurance: $800-$1,200 per session

Realistic combination cost with insurance: TMS ($1,800 average) + Spravato ($200-$400/session x 12 sessions = $2,400-$4,800) = $4,200-$6,600 total out-of-pocket

Realistic combination cost without insurance: TMS ($8,000-$10,000) + Ketamine IV ($400-$800/session x 12 = $4,800-$9,600) = $12,800-$19,600 total

Not cheap. But for people with severe, multi-treatment-resistant depression, those who have already spent years and thousands on medications that do not work, the higher remission rate may justify the investment.

Who Should Consider This Combination?

Combination TMS and ketamine is not a first-line treatment. It works for people who:

• Have tried multiple medications (3+) without enough response
• May have had partial response to TMS alone or ketamine alone
• Have severe symptoms that justify a more aggressive treatment approach
• Can handle the logistical commitment (clinic visits 5x/week for TMS, plus ketamine sessions)
• Have the financial resources or insurance coverage to make it feasible

It is not appropriate for people with:

• Active substance use disorders (ketamine has abuse potential)
• Uncontrolled hypertension (ketamine raises blood pressure)
• History of psychotic disorders (ketamine can worsen psychotic symptoms)
• Certain cardiovascular conditions

Finding a Provider

Not every TMS clinic offers ketamine, and not every ketamine clinic offers TMS. The clinics that provide both under one roof, with psychiatrists experienced in combination protocols, are still relatively uncommon but growing.

Start by searching our provider directory for TMS clinics in your area, then call to ask whether they also offer ketamine or Spravato. Or ask your current psychiatrist for a referral to a clinic that does both.

When evaluating a clinic, ask:

• How many people have you treated with the combination protocol?
• What is your sequencing approach (ketamine timing relative to TMS)?
• Who supervises the ketamine sessions? (Should be a physician, not just a nurse practitioner for IV ketamine)
• Do you coordinate with my prescribing psychiatrist?

This is frontier medicine. Evidence-based frontier medicine, but frontier nonetheless. Work with specialists who have real experience, not clinics that added ketamine as an afterthought to their TMS practice.