Depression affects over 21 million adults in the United States annually, and many don’t respond well to traditional treatments. Transcranial magnetic stimulation offers a different approach-one backed by FDA approval and growing clinical evidence.
At Gabriella I. Farkas MD PhD, we’ve seen firsthand how depression transcranial magnetic stimulation can help patients when other options fall short. This guide walks you through what TMS is, how it works, and whether it might be right for you.
What TMS Actually Is and How It Works
Transcranial magnetic stimulation uses magnetic pulses delivered through a coil placed against your scalp to stimulate brain cells in regions that control mood. Unlike medication, which circulates through your bloodstream and affects your entire brain, TMS targets specific neural circuits. The FDA approved TMS for major depressive disorder in 2008, and the evidence supporting it has only strengthened. Between 2016 and April 2024, researchers reviewed over 2,396 published studies and abstracts on TMS, establishing it as a legitimate alternative when antidepressants or therapy alone haven’t worked. The procedure is noninvasive, doesn’t require anesthesia, and you can drive yourself home afterward-though many patients prefer a ride after their first session. A psychiatrist experienced in TMS can determine whether this approach fits your specific situation and treatment history.
Standard TMS versus Newer Accelerated Protocols
Standard repetitive TMS, or rTMS, typically involves 20 to 30 sessions spread over four to six weeks, with treatment five days per week. Each session lasts about 20 minutes. According to the Mayo Clinic, response rates hover around 50%, with roughly 30% of patients achieving full remission. However, the field is shifting toward faster delivery methods. Intermittent theta-burst stimulation, or iTBS, condenses each session to just 3.5 minutes and produces comparable results to standard rTMS while reducing overall treatment burden. Stanford’s accelerated intelligent neuromodulation therapy, or SAINT, takes this further. It uses brain imaging to pinpoint the exact location where stimulation will be most effective, then delivers 50 sessions over five days-ten sessions daily with breaks between them. In a double-blind randomized trial published in the American Journal of Psychiatry in October 2021, 78.6% of SAINT participants were no longer depressed after five days, and 79% met FDA remission criteria within four weeks.
Only 13% of the placebo group achieved remission. Deep TMS uses a larger coil to stimulate deeper brain regions and shows even higher efficacy in some trials-around 65% remission compared to 30% with standard rTMS-though it can carry more side effects due to broader stimulation.
Why TMS Works Better for Some People Than Others
TMS works through strengthening connections between the dorsolateral prefrontal cortex, a region involved in decision-making and mood regulation, and the subgenual cingulate, an area typically overactive in depression. When these regions communicate more effectively, mood improves. However, not everyone responds equally. People who’ve tried multiple antidepressants without success often respond better to TMS than those trying it as a first option. Age matters too-adults between 18 and 65 tend to have the best outcomes, though older patients can still benefit. If you have a history of seizures or are currently experiencing active suicidal thoughts requiring crisis intervention, standard TMS programs typically won’t accept you. The precision of targeting matters enormously.
Older targeting methods, like the 5 cm rule used to estimate coil placement, can be unreliable because individual brain anatomy varies significantly. MRI-guided targeting, as used in SAINT and similar protocols, identifies your specific brain anatomy and connects directly to the circuits involved in your depression, which is why these approaches produce higher remission rates.
Cost and Insurance Coverage
TMS costs range from roughly $9,000 to $12,000 for standard TMS protocols to over $30,000 for accelerated fMRI-guided approaches. Many insurance plans cover standard TMS when you’ve tried at least two antidepressants without adequate relief. Coverage for newer accelerated protocols remains less consistent, so verify your plan’s specific requirements before starting treatment. Understanding these financial details upfront helps you plan accordingly and explore whether your insurance will support this option.
Disclaimer: This post is for general informational purposes. Connect with Dr. Farkas for your specific questions about mental healthcare.
Effectiveness of TMS for Depression
TMS produces measurable results, but the numbers vary significantly depending on which protocol you use and your treatment history. Standard repetitive TMS achieves a 50% response rate, meaning half of patients notice meaningful improvement in depressive symptoms. However, only about 30% reach full remission-the clinical threshold where depression symptoms largely disappear. This matters because response and remission are different outcomes.
You might feel better but still struggle with lingering symptoms, or you might achieve complete remission and feel like yourself again.
How Different TMS Protocols Compare
Deep TMS uses a larger coil to stimulate deeper brain regions and performs better in clinical trials. Studies show 65% remission rates compared to the 30% figure for standard TMS, though this comes with a trade-off of more frequent side effects from broader brain stimulation. The newer accelerated protocols like SAINT produce the most impressive numbers. In the Stanford trial published in the American Journal of Psychiatry, 79% of participants achieved FDA remission criteria within four weeks, compared to only 13% in the placebo group. That’s a dramatic difference, though it’s worth noting that SAINT remains a specialized treatment available at select centers and carries a higher cost than standard protocols.
TMS Versus Medication and Therapy
Antidepressants work for roughly 40% of people on the first medication trial, according to real-world data. If the first drug doesn’t work, you’re looking at weeks or months trying different medications before finding one that helps. TMS sidesteps this trial-and-error approach entirely. You don’t need to wait weeks for a medication to build up in your system-TMS produces measurable brain changes immediately, though mood improvements typically emerge within two to four weeks of starting treatment.
Adding cognitive behavioral therapy to TMS boosts remission rates by approximately 19% compared to TMS alone, so combining treatments works better than either option independently. Antidepressants carry side effects that many patients find intolerable: weight gain, sexual dysfunction, emotional blunting, and gastrointestinal problems that persist for as long as you take the medication. TMS side effects are temporary. Headaches and scalp discomfort fade after each session and diminish further as treatment progresses.
The time commitment differs between the two approaches. You attend TMS sessions five days per week for four to six weeks, whereas medication requires only daily pills. For people who’ve already failed multiple antidepressants, TMS becomes genuinely superior. Standard psychiatric practice reserves TMS for treatment-resistant depression, defined as failure to attain significant improvement from an accurately diagnosed condition. At that point, your odds with additional medications drop sharply, but TMS response rates remain around 50%.
Timeline for Noticing Improvement
Most patients report noticeable mood changes between two and four weeks into treatment, though this varies considerably. Some people experience improvement within the first week, particularly with accelerated protocols like SAINT. Others need the full four to six week course before depression symptoms meaningfully lift. Energy and motivation often improve before mood stabilizes completely. You might find yourself sleeping better or feeling less hopeless before you notice a genuine shift in how you experience daily life.
This timeline differs sharply from antidepressants, where you’re typically waiting six to eight weeks to assess whether a medication is working. With TMS, if you respond, you’ll have clear evidence within the treatment window. If you reach week four with no improvement, your treatment team can adjust the protocol or discuss alternative approaches.
Long-Term Outcomes and Maintenance
About half of people who respond to TMS maintain their improvement for at least twelve months after completing treatment, though some experience symptom return and require maintenance sessions or booster treatments. Insurance typically covers repeat TMS if symptoms return, making it feasible to return for additional sessions rather than committing to long-term daily medication. Understanding what happens after your initial treatment course helps you plan for sustained recovery and know what to expect if depression symptoms resurface.
The actual experience of TMS treatment-what happens during sessions, how many you’ll need, and what side effects to anticipate-shapes whether this approach fits your life and schedule.
Disclaimer: This post is for general informational purposes. Connect with a psychiatrist for your specific questions about mental healthcare.
Getting Started with TMS: What the First Weeks Look Look
Initial Evaluation and Medical Screening
Your initial TMS consultation determines whether you qualify as a suitable candidate and establishes your personalized treatment plan. Your treatment team will conduct a thorough review of your psychiatric history, current medications, seizure history, and any metal implants or implanted medical devices that could complicate treatment. Certain implants like aneurysm clips or cochlear implants may restrict your eligibility or require special precautions. The evaluation also addresses pregnancy status and other medical conditions affecting safety. If you take antidepressants, some can continue during TMS while others that affect brain excitability may need adjustment-your provider will clarify this before starting. Plan for your first session to last roughly an hour because it includes brain mapping, a process that identifies the optimal coil placement on your scalp and measures your motor threshold, the energy level needed to produce a visible finger twitch. This individualized measurement ensures your dosing matches your neurobiology rather than applying a one-size-fits-all protocol. After mapping, all subsequent sessions use the same coil location and energy level, making the actual treatment highly standardized once this foundation is established.
What Happens During Each TMS Session
During each TMS session, you sit in a comfortable chair wearing ear protection while a magnetic coil is positioned against your scalp. Standard rTMS sessions last about 20 minutes, though newer iTBS protocols compress this to 3.5 minutes, and accelerated protocols like SAINT involve ten 10-minute sessions daily with 50-minute breaks between them. You remain awake throughout and can resume normal activities immediately afterward-driving, working, or running errands all remain possible. A short headache or scalp discomfort after sessions is common but temporary and typically improves as treatment progresses.
Treatment Duration and Side Effects
Most patients complete their course through four to six weeks of treatment, attending sessions five days per week for standard rTMS, which totals roughly 20 to 30 sessions. Accelerated protocols compress this dramatically: SAINT delivers 50 sessions over just five days, fundamentally changing the treatment experience by concentrating intensive stimulation into a brief window rather than stretching it across weeks. Side effects remain mild to moderate for most patients-scalp tenderness, tingling, facial muscle twitching, lightheadedness, or fatigue-and these tend to improve rather than worsen as treatment continues. Serious side effects are rare, but seizures, mania in bipolar disorder, and hearing loss from inadequate ear protection represent genuine risks requiring careful screening and precautions. If side effects persist or interfere with your functioning, discuss adjustments with your treatment provider because energy levels can often be modified to reduce discomfort while maintaining therapeutic benefit.
Insurance Coverage and Cost Considerations
Insurance coverage varies substantially depending on your plan and diagnosis. Many policies cover standard rTMS for depression when you’ve tried a minimum number of antidepressants without adequate relief, meeting the medical necessity threshold. Coverage for OCD and smoking cessation is less common, and accelerated fMRI-guided protocols like SAINT often fall outside standard coverage, making out-of-pocket costs a significant barrier for many patients. Verify your specific plan’s requirements before committing to treatment so you understand what you’ll pay. After completing your initial treatment course, ongoing care typically involves medication or psychotherapy to sustain improvements, though maintenance TMS to prevent relapse isn’t yet proven effective in controlled research. If depression symptoms return after treatment ends, repeat TMS is possible and usually covered by insurance, offering a pathway to additional treatment without starting over with new medications.
Preparing Your Body and Mind for Treatment
Plan your schedule realistically around daily sessions and consider lighter workloads during treatment since fatigue is common. Prioritize quality sleep in the weeks before starting TMS to optimize your treatment response, and maintain a brain-healthy diet with omega-3 fatty acids, B vitamins, and antioxidants. Minimize excessive caffeine and alcohol before sessions since these can affect your neural responses. Build a support system of friends or family to provide encouragement during the treatment window, and use relaxation techniques like deep breathing or meditation if pre-session anxiety arises.
Disclaimer: This post is for general informational purposes. Connect with a psychiatrist for your specific questions about mental healthcare.
Final Thoughts
Transcranial magnetic stimulation offers a fundamentally different path when standard treatments fail to relieve depression. Unlike medications that require weeks to take effect and carry persistent side effects, depression transcranial magnetic stimulation produces measurable brain changes immediately while side effects remain temporary and mild. The clinical evidence is substantial: standard rTMS achieves 50% response rates with 30% remission, while newer accelerated protocols like SAINT reach remission rates above 75% in just five days.
The strongest candidates for TMS are adults between 18 and 65 with treatment-resistant depression, those who experienced intolerable medication side effects, and individuals seeking faster symptom relief than antidepressants provide. The time commitment spans four to six weeks of daily sessions, but this concentrated window produces outcomes that often exceed what months of medication trials achieve. Starting TMS begins with a thorough evaluation to confirm you qualify as a suitable candidate and establish your personalized protocol.
If you’re considering TMS or want expert guidance on whether it fits your situation, Dr. Gabriella Farkas provides comprehensive psychiatric evaluation and precision medication management for complex, treatment-resistant cases. With dual MD and PhD credentials in neuroscience, Dr. Farkas specializes in evaluating patients who haven’t responded to standard approaches and can help determine whether TMS or other advanced treatments align with your needs. The path forward starts with honest conversation about what you’ve already tried, what hasn’t worked, and what outcomes matter most to you.
Disclaimer: This post is for general informational purposes. Connect with a psychiatrist for your specific questions about mental healthcare.
