TMS is a non-invasive treatment that can reduce depression for some people when medication or therapy fall short, with studies distinguishing response from remission.
Does TMS work for depression?
Transcranial magnetic stimulation (TMS) can help some people with major depressive disorder, particularly when medication, 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. Understanding the terms used in research can make results easier to interpret.
TMS uses magnetic pulses applied to the scalp to stimulate selected areas of the brain involved in mood regulation. It is a non-invasive treatment, meaning it does not involve surgery or anaesthesia. A standard course is often around 36 weekday sessions over six to nine weeks, although the exact plan can differ between clinicians and treatment protocols.
TMS received FDA clearance for major depressive disorder in 2008. In 2021, FDA clearance was also granted for depression with comorbid anxiety.
When people ask whether TMS “works”, they are often asking two different questions:
- Will my symptoms improve?
- Could my depression reduce enough that I no longer meet the usual threshold for an active depressive episode?
In TMS studies, these outcomes are usually described as response and remission.
What does “response” mean?
A response means that a person’s depression symptoms have improved substantially during treatment. In clinical research, this is often defined as a reduction of around half on a recognised depression rating scale.
That definition can sound neat, but lived experience is more complicated. A person may be considered a responder because their score has fallen significantly, while still having symptoms that matter to them. They may still have low energy, disrupted sleep, difficulty concentrating or periods of sadness.
On the other hand, someone may feel that TMS has made an important difference even if their score does not reach the study definition of response. For example, being able to return to work more consistently, see friends, manage family life or feel less overwhelmed can be meaningful changes.
Response is therefore a useful research term, but it is not the only measure of whether treatment has been worthwhile.
What does “remission” mean?
Remission means that depression symptoms have reduced to a low enough level that the person no longer meets the usual scale-based threshold for significant depression.
It does not necessarily mean that every difficult feeling has disappeared. Most people still have ordinary reactions to stress, loss, illness and life changes. Remission is better understood as a period in which depressive symptoms are absent or minimal, rather than a promise of permanent freedom from depression.
In published TMS trials, remission is generally a stricter outcome than response. Some people improve considerably but do not reach remission by the end of the treatment course. Others may reach remission after a gradual improvement that becomes clearer later in treatment.
Clinicians may use questionnaires alongside regular conversations to monitor progress. These tools can help show changes that are not always obvious day to day, especially when improvement is gradual.
What do published TMS trials report?
Published trials of TMS for depression report that some participants experience a substantial improvement in symptoms, and some reach remission. However, results differ between studies.
This variation is important. Different trials may involve people with different histories of depression, different levels of treatment resistance, different TMS protocols and different ways of measuring outcomes. A study focused on people who have tried several antidepressants without sufficient benefit may have different results from one involving people earlier in their treatment journey.
Trial results also do not always match what happens in routine clinical care. Research studies may have strict eligibility criteria, closely scheduled appointments and regular symptom assessments. In everyday treatment, people may be balancing work, travel, family responsibilities, sleep difficulties, medication changes and other health conditions.
For these reasons, it is best to view published results as a guide to what may be possible, rather than a prediction of an individual outcome.
Why do individual results vary?
Depression is not one single experience. It can involve different symptom patterns, causes, durations and co-existing conditions. TMS outcomes can vary for several reasons.
Depression history and severity
Someone with a shorter or less complex history of depression may have a different treatment experience from someone who has lived with severe or recurrent depression for many years. Previous treatments, hospital admissions and the number of medication trials can also form part of the clinical picture.
This does not mean that a long history of depression rules out benefit. It means that expectations need to be personal and realistic.
The type of symptoms someone has
People can share a diagnosis of depression while experiencing it very differently. One person may mainly struggle with low mood and loss of interest. Another may have severe fatigue, anxious distress, sleep problems, slowed thinking or difficulty functioning at work.
Symptoms may not all improve at the same pace. Some people notice better sleep, concentration or motivation first. Others notice a lift in mood before practical functioning catches up.
Treatment protocol and attendance
TMS is delivered according to a planned course, and the protocol matters. A clinician will decide on the appropriate approach based on assessment, treatment history and suitability.
Attendance is also relevant. TMS courses commonly require weekday appointments over several weeks. Missing sessions may sometimes be unavoidable, but regular attendance helps the treatment team assess progress and keep the course on track.
Colorado’s geography can make practical access an important consideration. Travel across a large metropolitan area, mountain weather, work schedules and distance from a clinic can all affect how manageable a weekday treatment plan feels.
Other treatment and support
TMS may be used alongside ongoing psychiatric care, medication or talking therapy, depending on the person’s circumstances. A prescribing clinician should advise before making changes to antidepressants or other medicines during a course of TMS.
Day-to-day support matters too. Sleep, alcohol or substance use, physical health, stress, financial pressure and support from family or friends can all affect depression symptoms and recovery. This is not about blaming people for their illness. It recognises that depression treatment takes place in real life, not in a controlled trial.
How long does it take to know whether TMS is helping?
Some people notice changes during the early part of treatment. For others, improvement is more gradual and may become clearer after several weeks. It is also possible to have good days and difficult days while overall symptoms are improving.
Because progress is not always linear, clinicians commonly monitor symptoms across the course rather than judging treatment from one session or one week. Ask the provider how they will measure progress, when they would review the plan and what happens if symptoms do not improve as hoped.
It can help to discuss what outcomes matter most to you before starting. These might include getting out of bed more easily, returning to work, reducing suicidal thoughts, reconnecting with others, sleeping more regularly or feeling able to enjoy activities again.
Safety and expectations
TMS is generally carried out while a person is awake. Common side effects include scalp discomfort during treatment and headache afterwards. A seizure is rare, but it is a recognised risk that should be discussed during assessment.
A clinic should review your health history, current medicines and any factors that could affect suitability. Be open about previous seizures, neurological conditions, implanted devices, pregnancy, substance use and medication changes.
It is also reasonable to ask direct questions:
- What diagnosis and symptoms is TMS intended to treat in my case?
- How will you define improvement, response and remission?
- How will my progress be monitored?
- What side effects should I expect?
- What are the options if I do not respond?
- Will I continue seeing my usual mental health clinician?
Finding TMS care in Colorado
TMS Therapy Colorado currently lists 114 published clinics across the state. Directory listings include clinics in Colorado Springs, Denver, Lakewood, Fort Collins, Littleton, Boulder, Grand Junction, Longmont, Loveland, Highlands Ranch, Castle Rock and Centennial, among other Colorado communities.
A listing can help you identify nearby providers, but location is only one consideration. Ask about assessment arrangements, treatment scheduling, insurance processes, clinical oversight and follow-up planning before choosing a provider.
Getting help in Colorado
Use the TMS Therapy Colorado clinic listings to explore local providers, consult the insurance guide for questions about cover, and visit the contact page if you need help using the directory.
This article is educational information only and is not medical advice.
This page is informational and is not medical advice.