Transcranial Magnetic Stimulation (TMS): A Noninvasive Option When Depression Has Not Improved Enough

Depression can continue to affect sleep, work, school, relationships, and daily functioning even after someone has tried medication or psychotherapy. When symptoms remain significant, that does not mean you have to simply live with them, nor does it mean that repeatedly switching medications is the only next step.

Transcranial Magnetic Stimulation (TMS) is a noninvasive form of brain stimulation. For some patients who meet appropriate clinical criteria, TMS may be considered as part of a depression treatment plan, particularly when previous treatment has not provided enough improvement, medication side effects have limited treatment, or a clinician determines that another evidence-based option should be considered.

At Insight Choices, TMS is evaluated as part of comprehensive mental health care rather than treated as a stand-alone solution for everyone. Before treatment begins, the care team reviews your diagnosis, symptom severity, previous treatment response, current medications, medical and psychiatric history, and relevant safety risks, then discusses whether TMS is appropriate for you.

TMS is not right for every patient, and it cannot guarantee improvement or complete remission. Treatment response, course length, and follow-up needs vary from person to person.

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What Is Transcranial Magnetic Stimulation (TMS)?

TMS uses an electromagnetic coil placed against the scalp to generate rapidly changing magnetic fields. These magnetic pulses induce small electrical currents in targeted areas of the brain, which can influence neural circuits involved in mood, cognition, and other functions. TMS does not require surgery or an implanted device, and patients usually remain awake during treatment.

For depression, TMS commonly targets regions of the prefrontal cortex that are involved in mood regulation. Research shows that repetitive TMS (rTMS) can change activity within relevant brain networks, although the full mechanisms responsible for its therapeutic effects continue to be studied.

In the United States, different TMS systems have received FDA clearance for specific indications. The cleared condition, age range, stimulation method, and treatment protocol can vary by device. Therefore, saying that “TMS is FDA-cleared” does not mean every TMS system is cleared to treat every mental health condition. A qualified clinician must determine whether a particular device and protocol are appropriate for an individual patient.

What Is Transcranial Magnetic Stimulation (TMS)?
What Is Transcranial Magnetic Stimulation (TMS)?
What Is Transcranial Magnetic Stimulation (TMS)?

Who May Be Evaluated for TMS?

TMS is most commonly considered for depression, particularly when prior treatment has not provided enough improvement. You may discuss TMS with a clinician if you:

Have received a professional evaluation and have Major Depressive Disorder or another condition that meets the cleared indication for a specific TMS system

Have had an adequate trial of antidepressant medication but continue to experience significant symptoms

Have had difficulty completing medication treatment because of side effects

Have tried psychotherapy, medication, or other appropriate treatment and still need additional treatment options

Want to understand a noninvasive treatment that targets specific brain regions and your clinician believes it is clinically reasonable to consider

Are able to attend repeated in-person treatment sessions and required follow-up assessments

TMS candidacy cannot be determined only by the number of medications you have tried or by a single symptom. Your clinician will also consider whether the diagnosis is accurate, whether bipolar disorder or another condition may be present, your current medications and medical health, seizure risk, implanted devices, and other safety considerations. Insurance requirements and prior-authorization criteria may also differ from clinical eligibility.

What Happens Before TMS Treatment?

Comprehensive psychiatric and treatment-history evaluation

Your clinician reviews current symptoms, diagnosis, duration and severity of symptoms, prior medications, psychotherapy, other treatments, and how you responded to them.

Safety screening

Tell the care team about any history of seizures, significant neurological or brain conditions, head injury, pregnancy or plans for pregnancy, bipolar disorder or past manic episodes, and any implanted metal or electronic medical devices. Certain metallic or electronic implants in or near the head may be incompatible with a specific TMS system or may require additional safety review.

Review of medications and other substances

Some prescription medications, over-the-counter medications, substances, or recent medication changes may affect seizure threshold or treatment safety. Provide a complete list of medications, supplements, and substances you use. Do not stop or change a prescribed medication on your own in order to receive TMS.

Treatment goals and symptom tracking

Before treatment, the team establishes a baseline for symptoms and daily functioning. Depending on the clinical process, Insight Choices may use the PHQ-9 or other standardized rating scales to help monitor change over time. Rating scales support clinical assessment but do not determine diagnosis or treatment success on their own.

What Happens During a TMS Session?

You sit in a treatment chair while the clinician positions a magnetic coil against the appropriate area of your scalp. During the first treatment or early in the course, the team typically establishes individualized treatment parameters according to the device and protocol, including treatment location and an appropriate stimulation intensity.

Once treatment begins, the device delivers magnetic pulses in a programmed pattern. You may hear a repetitive clicking sound and feel tapping, tingling, or brief muscle movement around the scalp or face. Most TMS protocols do not require anesthesia or sedation, and treatment is not intended to induce a seizure.

TMS itself must be delivered in person. Session length and the overall schedule depend on the TMS device, stimulation protocol, and your clinical needs. Conventional rTMS often involves multiple treatments per week over several weeks, while newer stimulation approaches may use different session lengths or schedules. Your actual course should follow the individualized plan developed by the Insight Choices clinical team.

What Are the Common Side Effects and Risks of TMS?

TMS is generally well tolerated, but “noninvasive” does not mean risk-free. Common side effects can include:

Scalp discomfort, tenderness, or pain at the treatment site

Temporary headache

Tingling, twitching, or tightness in facial or scalp muscles

Lightheadedness or brief discomfort

These effects may be more noticeable early in treatment, and some patients become more comfortable as treatment continues. The treatment team may adjust stimulation settings or recommend other measures when appropriate.

Seizure is an uncommon but important risk. In people with bipolar disorder, TMS may also carry a risk of mood elevation, including mania or hypomania. Tell the care team promptly if you develop a substantially decreased need for sleep, unusually elevated or irritable mood, impulsivity, or other changes that are different from your usual baseline. Hearing protection is also typically used according to device and clinic safety procedures.

Who Needs Additional Safety Review Before TMS?

Before treatment, tell the care team if you have:

A history of seizures, brain injury, or another significant neurological condition

Non-removable metallic implants in or near the head

A cochlear implant, deep brain stimulator, implanted stimulator, medication pump, or another electronic medical device

Bipolar disorder or a history of manic or hypomanic episodes

Current pregnancy, possible pregnancy, or plans to become pregnant

Recent major medication changes, substance use, or other factors that may affect seizure risk

Having an implant does not automatically mean you cannot receive TMS. Safety depends on the device type, location, magnetic characteristics, and the TMS system being used. The clinical team should make this determination individually.

How Is TMS Different From Medication and ECT?

TMS and antidepressant medication are not mutually exclusive. Many patients continue medication or psychotherapy during a TMS course. Any change to an existing treatment plan should be discussed with a qualified clinician. TMS delivers stimulation to targeted brain regions and is not absorbed throughout the body like an oral medication. However, this does not mean TMS is always more effective than medication or that medication necessarily causes side effects.

Electroconvulsive Therapy (ECT) is a different form of brain stimulation. ECT is performed under anesthesia and intentionally induces a therapeutic seizure under medical monitoring. TMS usually does not require anesthesia and is not designed to induce a seizure. For some severe, psychotic, catatonic, or immediately high-risk depressive states, ECT may be a more appropriate and more rapidly acting treatment. The right treatment depends on severity, risk, prior treatment, and individual medical circumstances rather than a simple comparison of which treatment is “better.”

How Will We Know Whether TMS Is Helping?

Response varies. Some patients experience meaningful symptom improvement, others have a limited response, and some may not improve enough. TMS cannot guarantee complete remission, and it is not possible to predict exactly which session or week will produce improvement for a particular person.

During treatment, Insight Choices may use clinical interviews, changes in daily functioning, and standardized symptom scales to monitor response. If improvement is insufficient, side effects emerge, or the clinical picture changes, the treatment plan can be reassessed. After a treatment course, decisions about medication, psychotherapy, follow-up care, maintenance treatment, or future retreatment should be individualized.

Why Choose Insight Choices for TMS Evaluation and Treatment?

Integrated mental health care

TMS can be coordinated with psychiatric evaluation, medication management, psychotherapy, and other appropriate care rather than delivered in isolation.

Individualized decision-making

The team considers diagnosis, prior treatment, medical history, safety risks, and individual needs before recommending TMS.

Ongoing measurement and follow-up

Clinical evaluation and appropriate standardized tools can be used to monitor symptoms and daily functioning.

Safety-focused screening

Medical history, medication use, neurological risk, and implanted devices are reviewed before treatment.

Coordinated California mental health care

TMS itself requires in-person treatment. Other psychiatric evaluations and follow-up visits may be available through telehealth when clinically appropriate and consistent with location and applicable requirements.

Frequently Asked Questions

Ready to Learn Whether TMS May Be Right for You?

If previous depression treatment has not provided enough improvement, or medication side effects have made treatment difficult to continue, a comprehensive TMS evaluation can be a reasonable place to start. The goal of the evaluation is not to assume TMS is right for you, but to review your diagnosis, treatment history, safety considerations, and preferences and determine whether TMS should be part of your overall treatment plan.

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Important Medical and Safety Notice

This page provides general information about TMS and mental health services and is not a substitute for an individual diagnosis, treatment recommendation, or emergency medical evaluation. TMS indications, contraindications, device restrictions, and treatment settings can vary by device and patient circumstances. Treatment suitability must be determined by a qualified health care professional.

If you or someone around you is in immediate danger, call 911 or go to the nearest emergency department. If you are experiencing suicidal thoughts, a severe emotional crisis, or need immediate crisis support in the United States, call or text 988 to reach the 988 Suicide & Crisis Lifeline. TMS evaluation and routine psychiatric services should not be used as substitutes for emergency crisis care.

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