Brain stimulation treatments use magnetic fields or electrical current to change how nerve cells fire. Four are in use: rTMS, tDCS, vagus nerve stimulation (VNS) and deep brain stimulation (DBS).
The evidence varies a lot by condition. It is strongest for deep brain stimulation in Parkinson's disease, tremor and dystonia. It is reasonable for rTMS in depression, and for VNS in epilepsy that surgery cannot treat. It is weaker for tDCS in depression and VNS in depression. For several other uses, NICE says the treatment should only be used in research.
In Ireland, deep brain stimulation has a national public service in Dublin. We found no HSE statement that rTMS or tDCS is routinely funded. In the UK, NICE guidance shapes NHS use, but it does not decide funding.
If you are struggling with depression or thoughts of suicide: in Ireland or the UK, freephone Samaritans on 116 123, any time. In Ireland you can also text 50808. In an emergency, phone 112 or 999 in Ireland, or 999 in the UK. In the US, call or text 988.
NICE's guidance on procedures and devices uses three main levels:
This type of NICE guidance does not assess cost-effectiveness. It does not tell the NHS whether to fund a procedure. So "normal arrangements" does not mean every area offers it.
Brain stimulation is regulated as a device, not a medicine. In Europe, devices need CE marking. Great Britain uses UKCA marking, and in October 2026 the UK government confirmed it will keep accepting CE-marked devices long term.
What it is like. A coil is held against your scalp. No anaesthetic is needed and you go home the same day. NICE says sessions usually last about 30 minutes, daily, for two to six weeks.
Depression. NICE says the short-term evidence of efficacy is adequate, but response varies. It may be used with normal arrangements. A 2019 analysis of 113 trials found standard left-sided rTMS was linked to about three times the odds of response compared with sham. The authors noted that the precision of the estimates varied considerably.
Side effects. In NICE's review of 40 trials, headache affected 10% with high-frequency rTMS, against 3% with sham. Scalp discomfort affected 9%, against 2%. A seizure was reported in one patient, who recovered without lasting effects. One person had a hypomanic episode.
Other conditions. NICE says TMS for migraine should only be used with special arrangements, and that any benefit may be modest. For OCD, it says research only. In the US, the FDA cleared an rTMS device for depression in 2008 and one for OCD in 2018.
For depression treatment options more broadly, see depression: what actually works.
What it is. A weak current, typically 2 milliamps, passes between two pads on the forehead for about 30 minutes. It is now sold for use at home.
The evidence is mixed.
Regulation. In December 2025, the FDA approved one home headset, the Flow FL-100, for moderate to severe depression in adults. Its approval excludes people whose depression is "treatment refractory" to medication. The manufacturer says the device is CE-certified for Europe and the UK. NICE has not issued guidance on any specific headset.
Wellness devices are different. Some headsets are sold for focus or "brain training" without any medical claim. EU rules now place brain stimulators sold without a medical purpose in the highest risk class. A device not CE marked as a medical device for depression has not been assessed for treating depression.
Before you buy one, check whether it is CE or UKCA marked as a medical device for depression. Talk to your GP or psychiatrist first, especially if you have bipolar disorder, epilepsy or a skin condition on your scalp.
The vagus nerve runs from the brainstem to the chest and abdomen. Our vagus nerve explainer covers what it does, and why most "vagus nerve hacks" are unproven.
Implanted VNS. A surgeon wraps an electrode around the left vagus nerve in the neck. A pulse generator goes under the skin of the chest. Settings are adjusted wirelessly.
External VNS. A handheld device stimulates the nerve through the skin of the neck. NICE recommends one, gammaCore, for cluster headache. It should only continue if symptoms ease within three months. See how to tell migraine from cluster headache.
What it is. Thin electrodes are placed deep in the brain during surgery. They connect to a pulse generator under the skin of the chest. Stimulation can be adjusted after surgery.
In the US, the FDA approved DBS for tremor in 1997 and for Parkinson's disease in 2002.
These are devices, so the EMA does not license them as medicines. Medical devices need CE marking in the EU. Great Britain accepts CE or UKCA marking.
No. rTMS uses magnetic pulses, needs no anaesthetic, and is not meant to cause a seizure. ECT is a different treatment, given under general anaesthetic.
Some are sold online. In the US, the FDA approved one in 2025. NICE says tDCS for depression should only be used with special arrangements. Talk to your GP first.
No. Medical VNS uses a device to stimulate the nerve directly. Breathing exercises may affect the nervous system in other ways.
No. It can improve symptoms and quality of life for some people. It is brain surgery, with real risks.
This article is general information, not medical advice. Talk to your GP or specialist about whether any of these treatments could suit you.
Reviewed by: Proco Team
Last updated: November 2026