Everything you need to know about Preparing for Your First TMS Session: A Practical Walkthrough — how it works, what it costs, and how to find a provider who actually knows what they're doing.
The TMS Patient Buyer's Guide
Everything to know before your first consult — questions to ask, what to expect, and how to compare providers.
The first day is the day everyone has the most questions about — and the day clinics tend to explain in the least useful way (“just show up, we’ll handle the rest”). Here’s the actual walkthrough, from when you wake up that morning through when you walk out the door.
The Night Before
Sleep normally. You don’t need to do anything special. There’s no “sleep more for TMS” rule — just get your usual rest.
Don’t change your medications. Take your antidepressants, mood stabilizers, or anti-anxiety medications exactly as you normally would. If you’re on a benzodiazepine (Xanax, Klonopin, Ativan) or an anticonvulsant, mention it to the clinic — these can theoretically blunt TMS effects in some studies, but most clinics will work around it rather than pause your medication.
Avoid heavy alcohol use. Heavy drinking and alcohol withdrawal can lower the seizure threshold, and clinics generally ask you to avoid excessive alcohol during a TMS course. Ask your clinic what it recommends for the night before your first session.
Eat normally. No fasting required. Stick to your normal amount of caffeine; large amounts are generally discouraged around TMS because caffeine can lower the seizure threshold, so follow your clinic’s guidance.
What to Wear
Practical clothes you can sit in for an hour. The treatment chair reclines like a dentist’s chair.
- Avoid metal in or around your head: take out earrings, pull hair back without metal clips, leave the headband at home.
- Glasses are fine — they don’t interfere with the coil.
- Hearing aids: leave them in, but ask the clinic about their specific protocol — some prefer them removed because TMS produces a loud clicking sound and the clinic will provide earplugs.
- No need to wash hair specially — but freshly washed (no thick gel or dry shampoo) makes good electrical contact for the motor-threshold electrode if your clinic uses one.
What to Bring
- A list of your current medications with doses, even if the clinic already has it. Bring it written down.
- Your insurance card and ID, even if you’ve already done intake.
- Earplugs — the clinic will provide them, but if you have noise sensitivities, bring your own. The TMS coil produces a loud clicking sound during pulses, which is why hearing protection is standard.
- Headphones with calming music or a podcast — most clinics let you wear over-ear headphones during the session as long as they don’t have metal frames. This makes 20-37 minutes feel much shorter.
- A book, phone, or tablet for the post-treatment monitoring window if your clinic has one.
- A light snack and water bottle. You can’t eat during the session, but you’ll appreciate it after.
- A driver if it’s your first day — not because TMS impairs driving (it doesn’t, after the first session people drive themselves all the time), but because the first day is longer and more cognitively demanding than later sessions, and being able to relax helps.
The Actual First Session: What Happens
Day one is the longest day — typically 60-90 minutes — because of motor threshold mapping. Subsequent sessions are 20-37 minutes (standard rTMS) or 3-9 minutes (theta-burst iTBS).
Here’s the sequence:
1. Intake review (10-15 min): A technician confirms your medication list, asks about any new symptoms, and goes over consent forms.
2. Motor threshold determination (20-40 min): The most distinctive part of day one. The technician places the coil over your motor cortex and delivers single pulses at gradually increasing intensity, watching for a small twitch in your thumb or fingers. The intensity at which a thumb twitch reliably appears is your “motor threshold.” Treatment will be delivered at 100-120% of that threshold — calibrated to your individual brain.
You’ll feel the pulses as a sharp tapping or knocking sensation on your scalp. Some people describe it as “a woodpecker tapping” or “small electrical zaps.” It’s uncomfortable but not painful for most people. The thumb twitch is involuntary and is just the technician’s signal — not a treatment effect.
3. Coil repositioning (5 min): The coil moves from the motor area to your treatment target (typically the left dorsolateral prefrontal cortex for depression). Position is determined either by a “5 cm rule” (5 cm forward from the motor hot spot) or by neuronavigation if your clinic has it.
4. The actual treatment (3-37 min depending on protocol): Pulses are delivered in trains. For standard 10 Hz rTMS, that’s roughly 4-second trains followed by 26-second rest periods, totaling about 19-37 minutes. For iTBS, it’s a 3-9 minute single block. You stay awake, eyes open or closed, headphones on if you want.
5. Brief post-treatment check (5-10 min): A scalp check (rare cases of redness or scalp tenderness), a vitals check, and a quick “how do you feel?” before you leave.
What It Feels Like
The most common descriptions:
- The tapping sensation: noticeable, sometimes uncomfortable, especially in the first few sessions. For many people it becomes more tolerable over the first week or two, and your clinician can adjust settings if it’s too uncomfortable.
- Facial muscle twitches: the coil’s magnetic field can activate facial nerves, causing brief twitches in your forehead or jaw. Harmless and usually settles after the first few minutes of each session.
- A clicking sound: loud. Earplugs handle it.
- Mild scalp soreness afterward: a “I just got a tight hat removed” feeling for 30-60 minutes after. Tylenol is fine if you want it.
- Headache is common in the first week, usually mild, and often eases over the course.
What you generally don’t feel: any cognitive change immediately after. TMS doesn’t sedate, doesn’t impair driving, doesn’t cloud thinking. People go to work, school, the gym — same as before — right after a session.
The First Week: What to Expect
- Discomfort often decreases — many people notice the tapping less after the first week.
- Headaches usually fade by week two.
- You may feel “activated” in the first few days — slightly more energy or a slight uptick in anxiety. This is common and almost always settles.
- Don’t expect a mood lift yet. Standard depression TMS effects emerge during weeks 2-3, sometimes later. Some people feel sleep improving first, then energy, then mood. A small fraction respond in week one — most don’t. A few people even notice a brief lift within hours of session one; nobody fully understands why, and it doesn’t predict how you’ll do overall, so treat it as a nice surprise rather than something to expect.
- Keep your other treatments going — therapy, medications, exercise, social contact. TMS works best as part of a broader plan, not in place of one.
- Try not to miss sessions. TMS is designed as a consistent daily course. Life happens — if you have to miss one, tell your clinic and get back on schedule as soon as you can.
Red Flags to Tell Your Clinician About
Most side effects are mild and self-limited. Things worth flagging promptly:
- A severe or unusual headache, especially with vision changes
- Any seizure activity (extremely rare — about 1 in 30,000 sessions — but the most serious risk)
- A new or worsening rash on your scalp
- Suicidal thoughts that intensify rather than improve over the first 1-2 weeks
- Symptoms of mania (much less sleep than usual, racing thoughts, impulsive decisions)
These are all manageable but want a same-day conversation, not a “wait until next session” approach.
If You’re Feeling Anxious
It’s completely normal to feel nervous walking in, especially if you’ve already been through several medications that didn’t work and you’re hoping this one is different. Say so. TMS technicians deal with anxious patients every day and have ways to help — walking through each step before it happens, giving you something to hold, or just talking you through the first few pulses so nothing feels sudden. You are not the first person to feel this way in that chair, and by week two it will feel routine.
Practical Logistics for the Course
- Plan for 4-6 weeks of near-daily appointments. Most courses are 5 days a week for 4-6 weeks, totaling 30-36 sessions for depression (or fewer for iTBS protocols).
- Build it into your schedule like a job. Some people block off the same hour every day; others rotate based on work needs. Whatever works.
- Tell your employer if you can. You don’t have to disclose the diagnosis, but knowing you have a daily medical appointment for 4-6 weeks helps with scheduling.
- Keep a brief mood log — even a 0-10 score and one sentence per day. It helps you and your clinician notice changes that creep up gradually.
Bottom Line
Day one is the day with the most uncertainty and the most logistics. By day three or four, the routine settles in: walk in, sit down, headphones on, twenty minutes, walk out. The harder work — the slow shift in mood that emerges over weeks — happens quietly in the background.
Bring earplugs, bring a podcast, skip the alcohol the night before, eat normally. That’s most of it.
