Everything you need to know about Who Should NOT Get TMS: Contraindications Explained Honestly — how it works, what it costs, and how to find a provider who actually knows what they're doing.
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Most TMS content is written to get you to book a consultation. This article is the opposite: a straight accounting of who should not get TMS, who needs a careful conversation first, and which “contraindications” you may have read about that don’t actually hold up. A directory that lists TMS clinics has every incentive to soft-pedal this. We’d rather you trust the rest of what we publish.
The genuine hard stops
These are the situations where reputable clinics will decline to treat, full stop.
Ferromagnetic metal in or near the head
The TMS coil generates a strong, rapidly switching magnetic field. Ferromagnetic (iron-containing) objects within about 30 cm of the coil can heat, move, or malfunction. Hard exclusions include:
- Aneurysm clips or coils
- Cochlear implants
- Implanted stimulators with cranial leads — deep brain stimulators, vagus nerve stimulators with leads near the coil path
- Metallic fragments in the eye or skull (old injuries, shrapnel, some older stents and plates)
What does not exclude you: dental fillings, crowns, bridges, braces, titanium dental implants (titanium is not ferromagnetic), most joint replacements, and jewelry you can remove. If you’re unsure what an old implant is made of, the clinic will ask for records — that’s normal, not obstruction.
Cardiac pacemakers and implanted defibrillators
The head-to-chest distance provides some margin, and published safety reports exist, but many clinics decline these patients or require cardiology sign-off. If you have a pacemaker or ICD, expect “maybe, with coordination” at best — and be suspicious of any clinic that says “no problem” without asking a single follow-up question.
Active, uncontrolled epilepsy
TMS can, rarely, provoke a seizure — the published risk with modern protocols is on the order of a few events per tens of thousands of sessions, and most occur in people with predisposing factors. Uncontrolled epilepsy concentrates exactly that risk, and nearly all clinics treat it as exclusionary.
The gray areas — “it depends” answered honestly
A seizure history that’s old or resolved
A febrile seizure in childhood, or a single provoked seizure decades ago, is a discussion, not an automatic no. Clinics weigh how long ago, whether it was provoked, and current medications. Expect extra screening; don’t expect a reflexive rejection. What you should never do is omit it from the intake form — the screening exists to protect you.
Medications and substances that lower seizure threshold
Bupropion (Wellbutrin), some stimulants, tramadol, certain antibiotics, and alcohol withdrawal all lower the seizure threshold. None of these is an absolute contraindication — plenty of people do TMS while taking bupropion — but the prescribing physician should know everything you take, and heavy alcohol use is a real risk factor worth being honest about. (More on alcohol and TMS.)
Bipolar disorder
TMS in bipolar depression is actively used and studied, but there’s a small risk of switching into hypomania or mania, and treatment should be supervised by someone who knows your full history — usually with a mood stabilizer on board. This is a “specialist conversation,” not a walk-in situation. (TMS for bipolar depression, in depth.)
Pregnancy
Frequently listed as a contraindication; in practice it’s closer to the opposite conversation. TMS delivers no systemic drug exposure, the fetus is far from the magnetic field, and the accumulated case data is reassuring — which is why some clinicians consider TMS because a patient is pregnant and wants to avoid medication changes. It remains a careful, individualized decision. (The safety data reviewed.)
Age
TMS is FDA-cleared for adolescents 15+ (as of 2024) and used extensively in older adults — age by itself is not an exclusion in either direction. (Adolescents · Older adults.)
Active psychosis, acute substance dependence, unstable medical illness
Not “never,” but “not now.” These situations make it hard to deliver — and hard to benefit from — a 30-session outpatient course, and they need stabilizing first. A clinic that wants to start TMS during an untreated psychotic episode is a red flag, not a convenience. (More clinic red flags worth knowing.)
Things that do NOT disqualify you (despite what you may have read)
- Taking antidepressants. Most patients continue their medication during TMS; stopping is not required.
- Having tried “too many” medications. There’s no upper limit; extensive treatment resistance is the core TMS population.
- Therapy at the same time. Combining TMS with psychotherapy is encouraged, not prohibited.
- Migraines, tinnitus, anxiety. All are compatible with treatment; some are themselves targets of TMS research.
- Tattoos and permanent makeup. Occasionally flagged online because some inks contain iron oxides; facial tattoos very close to the coil merit a mention at screening, but this is almost never an actual barrier.
How screening actually works
Every legitimate clinic runs a structured safety questionnaire (most use some version of the standard TMS Adult Safety Screen) covering implants, seizure history, medications, neurological history, and pregnancy. It takes ten minutes. Answer it completely — the rare serious adverse events in TMS cluster around information that didn’t make it onto that form.
If you’ve read this far and nothing above applies to you, the safety half of the eligibility question is likely settled — the remaining half is diagnosis and insurance, which our qualification checklist walks through. And if something above does apply to you, bring it up front and center when you talk to a clinic: the good ones will engage with it seriously, and how a clinic handles your risk factors tells you most of what you need to know about them.
