TMS is a non-invasive option for depression that has not improved with medication or therapy; some people respond or reach remission, while others benefit little or not at all.
Does TMS work for depression?
Transcranial magnetic stimulation (TMS) can help some people with depression, particularly when medicines, talking therapy, or both have not provided enough relief. It is not a guaranteed treatment, and it does not work in the same way for everyone. An honest discussion of TMS should include both its potential benefits and its limits.
TMS is a non-invasive treatment that uses magnetic pulses, delivered through a coil placed against the scalp, to stimulate targeted areas of the brain involved in mood regulation. A person remains awake during treatment and can usually return to normal activities afterwards.
TMS was cleared by the US Food and Drug Administration (FDA) for major depressive disorder in 2008. It was later cleared for depression with comorbid anxiety in 2021. It is commonly considered for people whose depression has not improved sufficiently with antidepressant medication or who have found medication side effects difficult to manage.
Published clinical trials and real-world treatment studies generally show that a meaningful proportion of people with treatment-resistant depression improve with a full course of TMS. Some experience a substantial reduction in symptoms, while others reach remission. However, some people improve only partly, and some do not notice a worthwhile change.
What do “response” and “remission” mean?
When clinicians discuss TMS outcomes, they often use the terms response and remission. They are related, but they are not the same.
A response means that depression symptoms have improved substantially from where they were at the start of treatment. This is usually measured using a recognised depression questionnaire, alongside clinical conversations about day-to-day functioning. A response may mean someone is sleeping better, has more energy, feels less hopeless, or is better able to work, care for family, or keep appointments.
However, a person can respond to treatment and still have depression symptoms. For example, they may feel noticeably less low but still struggle with motivation, concentration, anxiety, or enjoyment.
Remission means that symptoms have reduced to a minimal level. It does not necessarily mean that life is stress-free or that a person will never feel sad again. Rather, it means they no longer meet the usual symptom threshold for an active depressive episode, or their symptoms are very mild.
In practical terms, remission might involve:
- Feeling more like oneself most days
- Returning to regular routines and responsibilities
- Having fewer or no persistent thoughts of hopelessness
- Sleeping and eating more consistently
- Being able to experience interest, connection, or pleasure again
Remission is usually the preferred goal, but response is still important. A substantial improvement can make other treatments more manageable and can give someone a better foundation for recovery.
What published research suggests
TMS has been studied in controlled clinical trials, including studies involving people who had not benefited enough from previous antidepressant treatments. Across this research, outcomes vary, but the overall evidence supports TMS as an effective option for a proportion of people with major depressive disorder.
Published trials commonly report that some patients achieve response and that a smaller group achieve remission by the end of a treatment course. Results from everyday clinical practice can differ from trial results because people receiving care may have more complex histories, additional mental or physical health conditions, or changes in medication and life circumstances during treatment.
It is also important to consider timing. Improvement is not always immediate. Some people notice early changes in sleep, energy, or negative thinking after several sessions. Others do not feel a clear shift until later in the course. A standard TMS course is often around 36 weekday sessions over six to nine weeks, although the treatment plan can vary according to the protocol and clinical assessment.
A lack of dramatic early change does not automatically mean treatment will not help. At the same time, a treating clinician should regularly review progress rather than assuming every person will benefit from the same schedule or approach.
Why results vary from person to person
Depression is not one uniform condition, and neither are the people receiving TMS. Individual outcomes can vary for many reasons.
One factor is the nature of a person’s depression. Depression that has been present for a long time, has returned repeatedly, or occurs alongside other significant conditions may be more complicated to treat. Anxiety, trauma-related symptoms, substance use, chronic pain, sleep problems, and medical illnesses can all affect how someone feels during and after treatment.
Previous treatment history can matter too. TMS is often used after several other treatments have not brought sufficient relief. This means many people starting TMS have already been living with difficult symptoms for some time.
Other factors may include:
- Whether the full recommended course is completed
- Attendance consistency, particularly with weekday appointments
- The specific TMS protocol used
- Medication changes during treatment
- Ongoing psychotherapy or other support
- Major stressors at home, work, or in relationships
- Sleep, alcohol or substance use, and general physical health
These factors do not mean that someone is responsible for whether TMS works. They are simply part of the wider clinical picture. A good assessment should consider the whole person, not just a depression score.
TMS is not an instant or permanent fix
For some people, TMS brings a lasting period of improvement or remission. For others, symptoms may return after an initial benefit. Depression can be a recurring illness, so continued care may still be needed even after a successful course.
A clinician may discuss a maintenance plan after treatment. This can include medication review, talking therapy, regular mental health follow-up, lifestyle support, or, in some circumstances, additional TMS sessions. The appropriate plan depends on the individual’s history and response.
TMS is generally well tolerated. The more common side effects are temporary scalp discomfort during treatment and headache afterwards. Seizure is a rare risk, which is one reason providers screen carefully for medical history, medications, and other factors that could affect safety.
People considering TMS should ask what monitoring will be used during their course. Regular symptom measures can help show whether there is gradual improvement that may not be obvious day to day.
Questions to ask a Montana TMS provider
A consultation is an opportunity to discuss whether TMS is appropriate, rather than a promise that it will work. Useful questions include:
- What diagnosis and treatment history make me a candidate for TMS?
- What outcomes would count as response or remission in my situation?
- How will my symptoms be measured during the course?
- What happens if I improve only partly?
- How long is the proposed treatment schedule?
- Can I continue medication or therapy during TMS?
- What side effects should I expect, and when should I contact the clinic?
- What follow-up or maintenance options are available?
Access can also affect whether a person can complete treatment consistently. TMS Therapy Montana currently lists 12 published clinics: four in Billings, four in Bozeman, two in Havre, one in Great Falls, and one in Missoula. Availability, referral requirements, consultation processes, and treatment schedules may differ between providers.
Insurance coverage should be checked before starting. Plans commonly encountered in Montana include Blue Cross and Blue Shield of Montana, PacificSource Health Plans, UnitedHealthcare, Aetna, Cigna, Allegiance Benefit Plan Management, Montana Medicaid, and Medicare. Coverage decisions may depend on diagnosis, previous treatments, clinical records, and the individual plan.
A realistic way to think about success
TMS can be worthwhile for people with depression, but success should not be reduced to a single promise or percentage. For some, success means remission. For others, it means fewer severe days, more ability to function, or enough symptom relief to re-engage with therapy, work, relationships, and daily life.
The most useful question is often not simply “Does TMS work?” but “Is TMS a reasonable option for my symptoms, treatment history, circumstances, and goals?” A qualified clinician can help answer that through a full assessment and an open discussion of likely benefits, limitations, risks, and alternatives.
Getting help in Montana
Explore TMS Therapy Montana’s clinic listings to find published providers in Montana, review the insurance guide for practical coverage questions, or use the contact page for help navigating the directory.
This is educational information, not medical advice.
This page is informational and is not medical advice.