TMS can reduce depressive symptoms and sometimes lead to remission, particularly when other treatments have not helped enough, but results vary and improvement may be partial.
Does TMS work?
Transcranial magnetic stimulation, usually called TMS, is a non-invasive treatment that uses magnetic pulses to stimulate targeted areas of the brain. It is most often considered for major depressive disorder, particularly when depression has not improved enough with antidepressant medicines, talking therapy, or both.
TMS was cleared by the US Food and Drug Administration for major depressive disorder in 2008. In 2021, FDA clearance was expanded to include depression with comorbid anxiety. It is not a guaranteed treatment, and outcomes differ from person to person. However, published clinical trials and real-world treatment experience show that some people have a meaningful reduction in depressive symptoms, while others reach remission.
An honest answer to “Does TMS work?” is therefore: it can work well for some people, but it does not work in the same way, or to the same degree, for everyone.
What “response” means
In TMS research and clinical practice, a response usually means that a person’s depression symptoms have reduced substantially during treatment.
Symptoms may be measured using questionnaires completed by the patient, a clinician, or both. These questionnaires can track changes in mood, sleep, energy, concentration, appetite, hopelessness, anxiety and day-to-day functioning.
A response does not necessarily mean that depression has gone away. Someone may still have symptoms but notice important improvements, such as:
- getting out of bed more easily
- having fewer days of low mood
- being able to return to work, study or family routines
- feeling less overwhelmed
- sleeping more regularly
- having more interest in activities or relationships
For many people, a substantial improvement is clinically meaningful even when some symptoms remain. Treatment planning may then focus on maintaining the improvement and addressing remaining difficulties through medication, therapy, lifestyle support or follow-up care.
What “remission” means
Remission means that depression symptoms have reduced to a very low level, often low enough that the person no longer meets the usual symptom threshold for an active depressive episode.
Remission is generally viewed as a stronger outcome than response. A person in remission may still have occasional low days or stress-related symptoms, as anyone can, but depression is no longer causing the same level of ongoing illness or impairment.
It is important not to treat remission as an all-or-nothing personal test. Depression can improve gradually. A person may first notice better sleep or energy, then a reduction in negative thoughts, and later a return of motivation or enjoyment. Others may have a less linear pattern, with better and worse days during the course.
Some people respond without reaching remission. Others may reach remission during treatment, while a smaller group may notice little change. Each of these outcomes provides useful information for the treating clinician and patient.
What published TMS trials generally show
Published TMS trials commonly compare active treatment with a sham treatment designed to resemble TMS without delivering the same therapeutic stimulation. Researchers then look at changes in depression rating scales and calculate how many participants meet criteria for response or remission.
Across studies, active TMS has generally performed better than sham treatment for appropriately selected people with major depressive disorder. The evidence supports TMS as an established treatment option, rather than an experimental one, for depression within its cleared uses.
However, trial results vary. Different studies may include people with different levels of depression, different treatment histories, different medication use and different TMS protocols. Some studies focus on people whose depression has been difficult to treat, while others include broader patient groups. This makes it unhelpful to expect one single outcome figure to apply to every person in Arizona.
A clinic should be able to explain how it defines improvement, how it monitors symptoms during treatment, and what it would consider if progress is slower than expected.
Why individual results vary
TMS outcomes are influenced by many factors. Some are known before treatment begins, while others only become clearer as treatment progresses.
One important factor is the nature of the depression itself. Depression is not identical from person to person. Symptoms, duration, severity, past episodes, co-existing anxiety and other mental or physical health conditions can all affect treatment planning and outcomes.
Previous treatment history also matters. TMS is often sought after several medicines or other treatments have not brought enough relief. People with more treatment-resistant depression may still benefit, but their path to improvement may differ from someone earlier in their treatment journey.
Other factors can include:
- whether the full recommended treatment course is completed
- attendance consistency
- the TMS protocol selected by the clinician
- medication changes during treatment
- alcohol or substance use
- sleep problems
- major life stress, grief or trauma
- access to ongoing therapy and practical support
- whether a person has an accurate diagnosis
TMS is normally delivered as a course rather than a one-off appointment. A standard course is often about 36 weekday sessions over six to nine weeks. Some people notice changes part way through, while others may not notice clear improvement until later in the course. For this reason, early lack of change does not always predict the final outcome.
TMS is not a replacement for careful assessment
Before starting TMS, a qualified clinician should assess whether it is suitable and safe. This includes discussing depression symptoms, previous treatment, medicines, medical history and any factors that could affect safety.
TMS may be one part of a wider treatment plan. Some people continue antidepressant medication, psychological therapy or both while receiving TMS. Others may need support with sleep, substance use, anxiety, physical health concerns or social pressures affecting their recovery.
A good assessment should also include discussion of expectations. It is reasonable to hope for improvement, but it is safer to approach treatment without assuming a particular outcome. Ask what the clinic will monitor, when progress will be reviewed, and what options may be considered if symptoms do not improve enough.
Side effects and treatment experience
TMS does not require surgery or anaesthesia, and people are usually awake for sessions. Common side effects include scalp discomfort at the treatment site and headache. These are often manageable and may lessen as treatment continues.
Seizure is a rare risk. The treating team should review relevant medical history and explain safety procedures before treatment starts.
Practical considerations matter too. Because sessions are usually scheduled on weekdays over several weeks, travel, parking, work, childcare and transport can affect whether a person can attend consistently.
TMS Therapy Arizona lists 196 published clinics across the state. Directory listings include clinics in Phoenix, Gilbert, Tucson, Yuma, Prescott, Mesa, Scottsdale, Prescott Valley, Peoria, Chandler, Glendale and Green Valley. When comparing options, consider not only location but also the assessment process, appointment availability, accepted insurance and follow-up arrangements.
Questions to ask a TMS provider
Before choosing a clinic, it may help to ask:
- Am I a suitable candidate for TMS?
- What diagnosis and symptoms are you treating?
- Which TMS protocol do you recommend, and why?
- How will you measure response during the course?
- What would remission look like in my situation?
- How many sessions are likely to be recommended?
- Can I continue my current medication or therapy?
- What side effects should I expect, and who do I contact if I have concerns?
- What happens if I do not respond as hoped?
- Is maintenance or follow-up treatment discussed after the course?
Insurance cover can vary by plan and clinical circumstances. In Arizona, patients may encounter Blue Cross Blue Shield of Arizona, Banner Health Plans, Aetna, Cigna, UnitedHealthcare, AHCCCS, Medicare including Medicare Advantage plans, and TRICARE West. Always confirm cover, authorisation requirements and out-of-pocket responsibilities directly with the provider and insurer.
Getting help in Arizona
Visit the TMS Therapy Arizona clinic listings to compare local providers, read the insurance guide for help understanding cover, or use the contact page for directory support.
This article is educational information, not medical advice.
This page is informational and is not medical advice.