iTBS 3x/day
The 3-Week Accelerated TMS Protocol
Three treatment sessions a day, fifteen treatment days, three weeks start to finish. Forty-five sessions in total, against thirty-six for a standard course delivered over four to six weeks.
This is the accelerated schedule that fits most easily around an ordinary working week. One visit of about ninety minutes a day, and you finish in roughly half the calendar time a standard course takes.
- Time in clinic
- 15 treatment days
- Sessions per day
- 3
- Total sessions
- 45
- Session length
- approximately 6 minutes
How the three-week protocol works
Three sessions per treatment day, each delivering 1,200 pulses of theta burst stimulation to the left prefrontal cortex, the area at the front of the brain that TMS treats for depression, in about six minutes.
How long are the gaps between sessions?
Thirty minutes, which is the interval the trial behind this protocol was built around. Three sessions with half an hour between them makes a treatment protocol of about seventy-eight minutes, and here that is one visit of roughly ninety minutes a day, arrival to departure. The gaps are part of the treatment rather than a wait: pooling 59 accelerated TMS studies, the intervals that performed best in the randomized trials ran from roughly 30 to 75 minutes. You are free during them, and most patients wait in the office rather than leaving and returning.
How much stimulation is that in total?
Forty-five sessions of 1,200 pulses each, so 54,000 pulses across the fifteen treatment days. That figure is not comparable with a standard course, because theta burst and conventional TMS do not deliver the same kind of pulse: a landmark trial found 600 theta burst pulses worked as well as 3,000 conventional ones in a single session. The comparison that does hold is within theta burst, where pooling 59 accelerated studies put whole courses between about 11,000 and 120,000 pulses, with a midpoint near 36,000. This schedule sits above that midpoint. It is a full course, not a reduced one.
How do you find the treatment site?
Dr. Nazarani sets it during brain mapping, a separate appointment before your first session. He uses scalp-based measurement, the established method in TMS: the site is measured from fixed landmarks on your head, after the stimulation strength is calibrated to your own motor threshold, which is the lowest setting that produces a small movement in your hand. That calibration is why two patients with the same diagnosis do not receive identical settings.
Regulatory status
This protocol is covered by the accelerated clearance the FDA granted for the MagVenture system in May 2026: two to ten sessions a day for adults with major depression that has not improved on antidepressant medication during this episode of illness.
A clearance describes what a device may be used to deliver. It is not a rating of how well a protocol works. What the research shows is below.
What three weeks looks like
Fifteen treatment days across three weeks, one visit a day, weekends off.
- 1
Before treatment begins
A consultation with Dr. Nazarani establishes whether TMS is right for you and whether this protocol is the right one. Brain mapping is a separate appointment before the first session, where the stimulation is calibrated to you and the treatment site is set.
- 2
Each treatment day
Three sessions, thirty minutes apart, each about six minutes of stimulation. Around ninety minutes in the building. You are seated, fully awake, and can drive yourself home afterwards.
- 3
Weeks one to three
The same structure, five days a week. Scalp sensation typically settles within the first few sessions. We track your progress throughout.
- 4
After the last session
In the trial behind this protocol, improvement had not levelled off when treatment ended. It commonly continues to build over the weeks after the last session, and this is when we assess how you have responded.
Because the daily commitment is short, most patients keep working through the course.
Who this protocol suits
You are comfortable driving to the office
A visit every weekday only works if it is a drive you can repeat. That covers more ground than people expect: much of the Houston area is within 20 to 25 miles of our Tomball office, and patients already drive in from as far as Bryan and College Station for standard TMS, which asks for more visits than this protocol does. If it is not a drive you would want to make daily, the five-day protocol is the better structure.
You want a shorter course without a full week off
Three weeks rather than four to six, with visits short enough to fit around a working day. This is the middle option between a standard course and clearing a week entirely.
You want the schedule that was tested, delivered as it was tested
This schedule was tested as a whole, in a controlled trial of 100 patients: three sessions a day, thirty minutes apart, across fifteen treatment days. What we deliver is that schedule.
You have depression that has not responded to medication
The clearance covers adults with major depression that has not improved on antidepressant medication during this episode of illness. That includes people whose depression comes with anxiety.
Standard TMS may still be the better choice. If you have insurance coverage for TMS and can attend daily, your out-of-pocket cost is very likely lower than self-pay accelerated treatment.
TMS is not right for everyone. Metal implants in or near the head, a history of seizures, and certain neurological conditions are among the things we screen for. Whether this protocol suits you is decided at your consultation with Dr. Nazarani.
What the research shows
The question this protocol answers is not whether three weeks beats four to six. It is whether you can compress the course and still get the benefit.
Where does this protocol come from?
A trial published in JAMA Psychiatry in 2025, which tested this exact schedule in 100 patients whose depression had not responded to medication: three sessions a day, thirty minutes apart, across fifteen treatment days. Neither the patients nor the doctors assessing them knew who was receiving the real treatment.
What is it based on?
Four things, and this schedule is the newest of them. TMS has been in clinical use for depression for two decades. Theta burst, the shorter form of stimulation used here, was tested head to head against standard TMS in a randomized trial and worked as well. Delivering more than one session a day has been studied across 59 trials and nearly 3,000 patients. The FDA cleared accelerated delivery on that combined basis, for two to ten sessions a day, rather than approving each schedule separately.
How well does it work?
52% of patients responded, meaning their symptoms dropped by at least half, against 22% of those given an inactive version of the treatment. 34% reached remission, meaning symptoms were minimal or gone, against 16%. Average symptom improvement was roughly 55% at week five, against 32%. Every patient in the trial had depression that had already failed to improve on medication.
So what does compressing the schedule cost you?
As far as this trial goes, it does not cost you the benefit. You get the same kind of result a standard course aims for, in three weeks of short visits instead of four to six weeks of daily ones.
When would I expect to feel different?
Not necessarily during the three weeks. In the trial, improvement had not levelled off by the time treatment ended, and it commonly continues to build over the following weeks. Judging this protocol by how you feel in the third week would be judging it too early, which is why we assess your response afterwards rather than on the last treatment day.
No treatment for depression works for everyone. If you do not respond, we discuss what to do next, which may mean a different protocol, a repeat course, or a different approach altogether.
Sources: Ramos et al., JAMA Psychiatry (2025); Blumberger et al., Lancet (2018); Wang et al., Brain Stimulation (2026). Full citations on the accelerated TMS page.
Cost
$6,500
All-inclusive: brain mapping, motor threshold determination, treatment, and follow-up assessments.
CareCredit, six months interest-free: about $1,084/month
Generally self-pay
This is a self-pay protocol. Accelerated TMS is not yet covered by insurance plans, which cover the standard once-daily course for FDA-cleared conditions when treatment-resistance criteria are met.
The price covers the complete course. There is no separate mapping fee and no per-session billing.
If insurance would cover standard TMS for you, your out-of-pocket cost on that route is very likely lower.
Location and access
The three-week protocol is delivered at our Tomball office, about 30 miles northwest of downtown Houston.
Tomball
TMS AvailableTomball, TX 77377
- Best suited to patients within comfortable driving distance, since it asks for a visit every weekday
- Patients regularly attend from Cypress, Spring, The Woodlands, Magnolia and Katy
- Each visit runs roughly ninety minutes, so most patients keep working through the course
- You can drive yourself to and from every visit
- If you are travelling from further afield, the five-day protocol is the better structure
How this compares
Three weeks is the middle option. This is what each protocol asks of you.
| Protocol | FDA-ClearedStandard TMSOnce daily | FDA-Cleared3-Week AcceleratediTBS 3x/day | FDA-Cleared5-Day AcceleratediTBS 10x/day | Off-LabelONE-D (Single Day)iTBS 20x/day |
|---|---|---|---|---|
| Time commitment | 36 visits | 15 treatment days | 5 consecutive days, about 9 hours each | 1 visit, about 9.5 hours |
| Sessions per day | 1 | 3 | 10 | 20 |
| Total sessions | 36 | 45 | 50 | 20 |
| Session length | approximately 19 minutes | approximately 6 minutes | approximately 10 minutes | approximately 3 minutes |
| Self-pay cost | from $7,000 | $6,500 | $10,000 | from $2,500 |
| Insurance | Covered by most major plans when treatment-resistance criteria are met | Generally self-pay | Generally self-pay | Self-pay only |
| Best for | Patients with insurance coverage whose schedule allows daily visits | Patients within driving distance who want a shorter course with randomized trial evidence behind it | Patients travelling in, and anyone who can clear one week | Patients under the tightest time constraint, who accept a newer evidence base |
| Learn more | Standard | 3-Week | 5-Day | ONE-D |
Scroll the table sideways to compare all protocols.
Frequently Asked Questions
TMS has been in clinical use for over 15 years. Serious side effects are rare and the risk of seizure is very low. It is not appropriate for everyone: metal implants in or near the head, a history of seizures, or certain neurological conditions may rule out candidacy. This is evaluated during your consultation.
In most cases, yes. Dr. Nazarani conducts a full medication review at your evaluation and advises on any adjustments needed before or during treatment.
Before your first treatment, Dr. Nazarani locates the precise treatment target. He calibrates the motor threshold to your individual neuroanatomy and sets the stimulation site based on your condition and the protocol selected. This is why two patients with the same diagnosis do not receive identical treatment.
No. The accelerated protocols on our MagVenture system are cleared for use with or without MRI or neuronavigation equipment, and we use validated scalp-based targeting. The dose and the schedule are identical either way.
What matters most is the total amount of stimulation you receive, not how many weeks it takes to deliver. Accelerated protocols give you a full course. Both of the accelerated schedules we offer have been tested in controlled trials, and the five-day schedule in several. Standard TMS still has the longest track record of any approach, and it may be the better option if your schedule and your insurance both allow it.
Generally not yet. Standard TMS is widely covered for FDA-cleared conditions and we accept most major plans. Accelerated protocols are currently self-pay, priced as an all-inclusive course rather than per session, with CareCredit financing available over six months interest-free.
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Read articleFind out whether the three-week protocol fits
The first step is a consultation with Dr. Nazarani. He will review your history and tell you whether this protocol is right for you, or whether standard TMS or a different schedule would serve you better.