Does TMS Work? Success Rates, Who Responds, and How Results Are Measured
Yes, for a meaningful share of people whose depression has not responded to antidepressants — and no, not for everyone. In large published naturalistic studies of TMS for treatment-resistant depression, roughly half or more of patients responded (a substantial reduction in symptom scores) and roughly a third reached remission by the end of a standard course. Those are group figures, not a promise; an individual's odds depend on history, protocol, and completing the course. Denver TMS Therapy tracks standardized symptom scores through every course so that "is it working" is answered with numbers, not impressions.
What "success" means in TMS studies
Studies report two outcomes: response, usually defined as a 50% or greater reduction on a standardized depression scale, and remission, meaning scores fall into the normal range. Remission is the higher bar. Both are measured at the end of a course; durability studies follow patients for a year or more, and many who respond maintain the benefit, sometimes with maintenance sessions.
Who tends to respond
Published findings and clinical experience point to a few patterns: patients who complete the full prescribed course do better than those who stop early; fewer failed medication trials is associated with higher response; and early improvement by the mid-point of a course is a favorable sign, though late responders exist. None of these rule anyone in or out — they inform the conversation at evaluation.
How we measure it here
A standardized symptom score at evaluation, repeated at set points through the course, reviewed by your psychiatrist. If the numbers are not moving by the point where they usually do, the plan is revisited rather than simply continued.
If TMS does not work
It is a different mechanism from medication, and non-response to one does not predict non-response to the other. Options in the same clinic include SPRAVATO®, ketamine therapy, a medication review, and in some cases a second TMS course with a different protocol.
FAQ
What percentage of people respond to TMS?
Large naturalistic studies report response in roughly half or more of treatment-resistant patients and remission in roughly a third. Individual results vary.
How soon does TMS work?
Some patients notice change within the first two to three weeks; others improve later in the course. Early improvement is favorable but not required.
Does TMS work for anxiety?
TMS is FDA-cleared for major depressive disorder and for anxious depression — anxiety symptoms that accompany depression. It is not a standalone treatment for anxiety disorders without depression.
Does TMS last?
Many who respond maintain the benefit for a year or more; some use maintenance sessions. Your psychiatrist discusses a maintenance plan at the end of the course.
Whether TMS is likely to work for you is a question for the evaluation. Request a consultation.