Who VNS is for
VNS is reserved for people with long-running, severe depression that has not responded to multiple medications, therapy, and often ECT. It is not a first-line or rapid treatment — improvement typically develops gradually over several months of stimulation.
What the evidence shows
Long-term studies show a meaningful share of carefully selected patients improve and stay improved over one to two years, though acute response rates in early trials were modest. Because benefits are slow and the device requires surgery, psychiatrists weigh it only after other options are exhausted.
Living with the device
The stimulator is adjusted at office visits. Common side effects include voice changes or hoarseness, throat tingling, and shortness of breath during stimulation, which often lessen over time. The battery eventually needs surgical replacement.
Common questions
Can the device be removed?
The pulse generator can be removed or turned off; the electrode on the nerve is usually left in place. Discuss reversibility with the surgeon.
Is VNS the same as TMS?
No. TMS is non-invasive and done in a clinic chair; VNS is a surgically implanted device for a much smaller group of patients.
This guide is educational and not medical advice. If you are in crisis, call or text 988.