Comparisons
TMS vs. Ketamine Therapy: Which Is Right for You?
By the TMS Nearby editorial team · Reviewed June 12, 2026
TMS and ketamine therapy are the two most common next steps when antidepressants haven't worked. Both have strong evidence for treatment-resistant depression — but they work in completely different ways and fit different situations.
TMS uses magnetic pulses to stimulate underactive brain regions over a six-to-nine-week course. Ketamine acts on the glutamate system and can lift symptoms within hours to days, but requires ongoing maintenance.
Side-by-side comparison
| TMS therapy | Ketamine therapy | |
|---|---|---|
| How it works | Magnetic stimulation of the prefrontal cortex | NMDA-receptor modulation of the glutamate system |
| FDA status | FDA-cleared for depression and OCD | Off-label (esketamine/Spravato is FDA-approved) |
| Speed of relief | Gradual, typically 2–4 weeks into the course | Rapid, often within hours to days |
| Course | 30–36 sessions over 6–9 weeks, then done | 6-session induction, then ongoing maintenance |
| Insurance | Covered by most insurers and Medicare | Rarely covered (Spravato is covered) |
| Typical cash cost | $6,000–$15,000 full course | $2,500–$4,500 induction + maintenance |
| Session experience | Awake, alert; drive yourself home | Dissociative effects; need a ride home |
| Common side effects | Scalp discomfort, headache | Dissociation, nausea, blood-pressure rise |
When TMS tends to be the better fit
- You have insurance — TMS is widely covered, making it dramatically cheaper out of pocket.
- You want a defined course with durable results rather than open-ended maintenance.
- You can't or don't want to experience dissociative effects, or need to drive yourself to appointments.
- You have a history of substance use concerns, where ketamine may be less appropriate.
When ketamine tends to be the better fit
- You need fast relief — for example, severe depression with acute distress (for suicidal ideation, Spravato is specifically approved).
- You can't commit to five visits a week for six or more weeks.
- You've already tried TMS without an adequate response.
- Daily-life logistics favor fewer, longer visits over many short ones.
Can you do both?
Yes — they aren't mutually exclusive. Some patients use ketamine for rapid stabilization and TMS for durable longer-term response, or move to the other option if the first doesn't deliver enough improvement. A psychiatrist experienced with both modalities can sequence them sensibly.
Frequently asked questions
Which works faster, TMS or ketamine?
Ketamine. Many patients feel improvement within hours to days of the first session, while TMS benefits typically build gradually over two to four weeks of treatment.
Which is more effective long term?
Head-to-head data is limited. TMS response tends to be durable after a completed course — many responders stay well for a year or more. Ketamine's benefits fade without maintenance sessions. The right answer depends on your history, budget, and goals.
Which is cheaper?
With insurance, TMS — copays usually total far less than cash-pay ketamine. Without insurance, a ketamine induction is cheaper upfront ($2,500–$4,500) but maintenance costs accumulate, while TMS is a one-time $6,000–$15,000 course.
Keep exploring
Sources
This guide is for educational purposes only and is not medical, legal, or insurance advice. Costs, coverage, and clinical suitability vary by individual, plan, and clinic — always verify directly with your provider and insurer. If you're in crisis, see our crisis resources.