If Transcranial Magnetic Stimulation (TMS) hasn’t led to meaningful improvement by session 20, I carefully reassess coil position, motor threshold, and dosing, and, if tolerated, increase settings to a clearly therapeutic level. At this point, I also encourage adding psychotherapy and considering starting or adjusting medications that haven’t been tried before.
TMS can be highly effective for many people with treatment-resistant depression, but it does not work for everyone. When symptoms persist, the next step is a thorough review of your treatment plan, diagnosis, and other available therapies. Some patients respond later in the treatment course or shortly after completing all sessions.
Completing the Full Treatment Course
There is no medical harm in completing all 36 TMS sessions to obtain a definitive answer, though practical considerations like scheduling and logistics may come into play. While a small minority of patients respond later in the course, most do not experience improvement if there has been zero change by session 20. Completing the full protocol is important before determining the treatment’s effectiveness.
Important Factors to Review if TMS Is Not Working
TMS typically involves daily sessions over four to six weeks. Some patients may experience delayed response, so it is important to complete the recommended number of sessions before concluding that the treatment has not worked.
Treatment Targeting and Stimulation Settings
TMS works by stimulating specific areas of the brain involved in mood regulation, most commonly the left dorsolateral prefrontal cortex. If improvement is limited, clinicians may review coil placement, stimulation intensity, and the overall treatment protocol to determine whether adjustments could enhance the response.
Reevaluating Your Diagnosis and Contributors
When depression appears resistant to treatment, it may help to reconsider whether other conditions are contributing to symptoms. Mood patterns may involve bipolar disorder, trauma-related conditions, substance use, or other medical or psychological factors. A thorough reassessment can help guide the next steps.
Possible Reasons TMS May Not Have Been Effective
Some patients do not respond fully to TMS due to:
- Missed or inconsistent treatment sessions
- Suboptimal coil placement or stimulation parameters
- Active substance use
- Underlying medical or neurological conditions
- More complex or severe depression
A comprehensive, individualized approach is often necessary to achieve meaningful improvement.
Next-Line Treatment Options for Resistant Depression
If TMS hasn’t led to meaningful improvement, it’s important to consider additional steps to address treatment-resistant depression and ensure a comprehensive approach.
- Medication strategies: Trying different antidepressants, older classes such as MAOIs, or combination therapies
- Psychotherapy: Evidence-based approaches tailored to trauma or personality patterns
- Ketamine-Based Treatments: Rapid-acting therapies that work through different brain pathways
- Vagus Nerve Stimulation (VNS): Implantable neuromodulation therapy for long-standing depression
- Electroconvulsive Therapy (ECT): Often the most effective acute treatment for severe, treatment-resistant depression
Can TMS Be Tried Again?
Some patients benefit from additional or modified TMS treatments, such as:
- Extending the number of sessions
- Adjusting the treatment protocol or using newer stimulation techniques
- Incorporating maintenance or booster sessions
TMS can also be combined with medication or psychotherapy to increase effectiveness.
Moving Forward
If TMS has not worked as expected, it is important to remember that many effective options remain available. Treatment for depression is highly individualized, and working closely with your psychiatrist will help determine the best next steps and identify therapies most likely to support long-term recovery.
Frequently Asked Questions
What if TMS doesn’t work for me?
Not all patients respond to TMS. If improvement is limited, your doctor may review your treatment course, coil placement, stimulation settings, or consider other therapies such as medication adjustments, psychotherapy, ketamine, VNS, or ECT.
How long should I complete my TMS treatment?
A standard course is 30–36 sessions over four to six weeks. Some patients respond later in the series, so completing the full protocol is important before determining effectiveness.
Can TMS be retried or adjusted?
Yes. Some patients benefit from extended sessions, modified protocols, or maintenance/booster treatments. Combining TMS with medication or psychotherapy can also improve results.
What are alternative treatments if TMS doesn’t work?
Options include ketamine therapy, ECT, VNS, medication adjustments, and specialized psychotherapy programs.
Why might TMS not work for me?
Possible factors include missed sessions, suboptimal coil placement or stimulation settings, underlying medical conditions, substance use, or complex depression.
Author: Dr. Hong Yin
Hong Yin, MD, has been a practicing medical professional in the Milwaukee community since 2012. She understands that your health and wellness concerns extend beyond routine medical care. She’s a highly trained, board-certified psychiatrist who provides an array of comprehensive services and procedures to help people overcome mental health problems.