How TMS Therapy Works

TMS, or transcranial magnetic stimulation is a highly effective therapy which works by utilizing focused magnetic pulses to stimulate the function of nerve cells in specific regions of the human brain. It is long noted that there are functional differences in the brains of individuals suffering from depression. Specific brain regions are highly underactive in people with clinical depression and major depressive disorder. TMS treatment targets the dorsolateral prefrontal cortex, which is the part of the brain responsible for mood regulation, decision-making, and emotional processing. When this region is not functioning properly, some of depressions most troubling and debilitating symptoms like persistent sadness, loss of motivation, hopelessness and difficulty concentrating take hold. TMS reanimates those specific neural circuits, all without psychiatric medication, surgery, and it is relatively painless so no anesthesia is needed. The FDA first cleared TMS for the treatment of major depressive disorder in 2008, and since then, approximately 1.5 million patients in the United States have safely received the treatment, according to data cited in ScienceDirect (Bastiaens et al., 2024). The results are astounding-a literature review published in PMC found that response rates to TMS therapy range between 50% and 55%, and as high as 65% in some populations, with full remission rates between 30% and 35% in patients with major depression. This is a startling contrast to the grim statistics lived for those who live with treatment resistant depression, which offers effectiveness of less than 10% after failing 3-4 psychotropic medications. 

Key Takeaways

• TMS uses magnetic pulses to stimulate the dorsolateral prefrontal cortex, the part of the brain involved in mood regulation that is often underactive in depression.
• The FDA cleared TMS for major depressive disorder in 2008. Since then, approximately 1.5 million U.S. patients have been treated.
• Response rates range from 50 to 65%, and full remission rates range from 30 to 35%, according to multiple clinical reviews published in PMC.
• Real-world data from MUSC (Medical University of South Carolina) shows an 83% response rate and 62% remission rate in practice settings.
• TMS is non-invasive, requires no anesthesia, has no systemic side effects, and patients can drive themselves home after each session.
• A standard course involves 30 to 36 sessions over 4 to 6 weeks, with each session lasting about 20 minutes.

The Science Behind TMS

TMS stands for Transcranial Magnetic Stimulation. The treatment uses an electromagnetic coil placed against the scalp to deliver targeted magnetic pulses into the brain. These pulses pass painlessly through the skull and generate small electrical currents in the dorsolateral prefrontal cortex, activating neurons that have become sluggish or underresponsive in depression.

In a healthy brain, the dorsolateral prefrontal cortex helps regulate emotions, plan ahead, and maintain focus. In people with major depressive disorder, this region often shows reduced activity. Brain imaging studies have consistently confirmed this pattern. TMS essentially wakes that region back up by delivering repeated pulses that stimulate neural firing and promote the release of neurotransmitters like serotonin and dopamine.

Over the course of several weeks, this repeated stimulation leads to lasting changes in brain connectivity. A 2025 review published by ScienceDirect found that TMS normalizes dysfunctional connectivity within large-scale brain networks, including the default mode network and the central executive network, which are associated with improved emotion regulation and cognitive control. In simpler terms, TMS helps the brain rewire itself so it can regulate mood more effectively on its own.

What a TMS Session Looks Like

TMS begins with an evaluation by a psychiatrist to determine whether this is the right depression treatment for you. Then, if cleared, you will have a mapping session where the correct region of the brain to incite a response is found. Following treatments  lasts about 20 minutes. You sit in a comfortable chair, fully awake and alert, while a technician positions the electromagnetic coil against a specific spot on your head. You will feel a tapping or clicking sensation on your scalp as the magnetic pulses are delivered. Most people describe it as mildly uncomfortable at first but easy to get used to after the first few sessions.

There is no anesthesia, no sedation, and no recovery time. You can drive yourself to and from the appointment, go back to work, or continue your normal day immediately after each session. While commonly confused with ECT or electroconvulsive therapy, the two are incomparable. (ECT) is described as painful and requires general anesthesia and it can cause temporary memory problems.

A standard course of TMS involves 30 to 36 sessions over 4 to 6 weeks, typically scheduled five days a week. According to MUSC, patients tend to start feeling better around week four, although many report subtle improvements sooner. The gradual nature of the results is normal. The brain needs time to build new patterns of activity, similar to how cognitive behavioral therapy builds new thinking patterns over time.

Who Is TMS For?

TMS is primarily for adults with major depressive disorder who have not responded adequately to medication. This is often called treatment-resistant depression, which generally means a patient has tried at least 3-4 antidepressants at an adequate dose and duration without sufficient improvement.

According to research published in PMC, only 50 to 60% of patients with depression improve with antidepressant medication alone, and only 30 to 40% achieve full remission. That leaves a significant number of people who are still struggling despite doing everything they were told to do. After failing one medication for depression your odds of improving with another drug or combination of drugs is reduced with each additional med failure. TMS gives those patients a different pathway to recovery that works through a completely different mechanism than medication.

TMS is also FDA-cleared for obsessive-compulsive disorder and is being studied for other conditions including anxiety, PTSD, ADHD, and chronic pain as well as dementia and anti aging. However, its most established use and strongest evidence base is for major depressive disorder. In Pennsylvania, where 19.3% of adults reported depression in 2023 according to America’s Health Rankings, the need for effective treatment options beyond standard medication is substantial.

How Effective Is TMS?

TMS effectiveness depends on the measure and the setting, but across the board, the numbers are encouraging. A literature review in PMC reported response rates of 50 to 65% and remission rates of 30 to 35% in clinical trial settings. A 2023 meta-analysis published in BMC Psychiatry by Vida and colleagues found that patients treated with repetitive TMS were nearly three times more likely to achieve remission compared to control groups, with a remission rate of 35% versus just 8%.

Real-world data tends to be even stronger. MUSC reported an 83% response rate and 62% remission rate in practice settings, which likely reflects the benefits of individualized treatment adjustments that happen outside of rigid trial protocols. A separate study of 196 patients with treatment-resistant depression, published in PMC, found that when TMS was combined with psychotherapy, the response rate reached 66% and the remission rate reached 56%.

That last finding is especially meaningful. TMS and therapy are not competing treatments. They are complementary. TMS restores the brain’s capacity for emotional regulation, and therapy gives you the skills to use that capacity. We offer both TMS and evidence-based therapy, including CBT, DBT, and EMDR, so that clients can get the full benefit of an integrated approach.

What to Expect After TMS Treatment

After completing a full course of TMS, many patients experience relief that lasts six months to a year or longer. Some people may need maintenance sessions or occasional booster treatments if symptoms begin to return. These are usually shorter courses than the original treatment and can be scheduled proactively.

Continuing with therapy after TMS helps sustain the gains. Research cited by Cognitive FX found that combining TMS with CBT improved remission rates by approximately 19% compared to TMS alone.

Healthy lifestyle factors like regular exercise, consistent sleep, good nutrition, and ongoing anxiety or depression management also play a role in maintaining results.

The most common side effect of TMS is mild scalp discomfort at the treatment site, which typically fades after the first few sessions. There are no systemic side effects like weight gain, sexual dysfunction, or cognitive impairment, which are common concerns with many psychiatric medications. This makes TMS an appealing option for people who have experienced difficult side effects from antidepressants.

Frequently Asked Questions

Does TMS Hurt?

TMS does not hurt, but most patients feel a tapping or clicking sensation on the scalp during treatment. Some people experience mild discomfort in the first few sessions, which usually decreases as the scalp adjusts. No anesthesia or pain medication is needed.

How Long Do TMS Results Last?

TMS results typically last six months to a year or more after completing a full course. Some patients maintain improvement for much longer, especially when they continue with therapy and healthy habits. Maintenance sessions are available if symptoms begin to return.

Is TMS Covered by Insurance?

Many insurance plans cover TMS therapy for treatment-resistant depression, though coverage varies by provider and plan. Most insurers require documentation that at least 3, and sometimes 4 prior medication trials that were unsuccessful before approving TMS. It is worth checking with your insurance company and your provider’s office about coverage details.

Can You Do TMS and Take Antidepressants at the Same Time?

Yes, many patients continue taking antidepressants while undergoing TMS treatment. TMS is often added as an augmentation strategy when medication alone has not provided enough relief. Your psychiatric provider can help determine the best combination for your situation.

Is TMS the Same as Electroconvulsive Therapy (ECT)?

No, TMS is not the same as ECT. ECT uses electrical currents under general anesthesia to induce a controlled seizure and is typically reserved for the most severe cases. TMS uses magnetic pulses without anesthesia, has no cognitive side effects, and is done on an outpatient basis. Both are effective for depression, but they work through different mechanisms and have different risk profiles.

Moving Forward

TMS therapy offers a real, evidence-based option for people with depression who have not found relief through medication alone. It is non-invasive, well-tolerated, and backed by decades of research showing meaningful response and remission rates. For many patients, TMS is the treatment that finally makes a difference after years of trying other approaches.

We offer TMS for depression at our Greensburg location as part of a full range of psychiatric and therapeutic services. Our team can help you determine whether TMS is right for you and build a treatment plan that addresses the whole picture.

At Counseling and Wellness Center of Pittsburgh, we are here to help you find what works.

Contact us to learn more or schedule a consultation.

Reviewed by Stephanie Wijkstrom