Vagus Nerve Stimulation (VNS) for Epilepsy

What Is Vagus Nerve Stimulation?

Vagus nerve stimulation (VNS) is a treatment for epilepsy that does not respond to medicines. A chest generator sends mild electrical pulses along the left vagus nerve in the neck. These pulses then reach the brain and can make seizures fewer and milder.

People often call it an "epilepsy pacemaker". Yet it does not touch the brain or the heart. Instead, the surgeon uses two small cuts: one in the neck, one below the collarbone.

VNS adds to your seizure medicines and rarely replaces them. It also works slowly, so the full effect can take a year or longer (MedlinePlus).

At a Glance

• What it treatsSeizures that continue despite medicines, when surgery cannot remove their source
• How it worksA chest implant sends mild pulses along the left vagus nerve to the brain
• SurgeryAbout an hour under general anesthesia in Prof. Albayrak's practice
• Going homeUsually the same day or the next morning
• ResultsFewer, shorter or milder seizures over months; full seizure freedom is rare
• Flying homeAfter a wound check; VNS does not open the skull

Where Are You in Your Decision?

Choose the line that fits you. Each one then leads to the matching part of this guide.

1. 01Seizures continue despite two or more medicinesWhen epilepsy counts as drug-resistant→
2. 02Told that surgery cannot remove the seizure sourceWhere VNS fits after an epilepsy evaluation→
3. 03Looking into VNS for a childAge, the decision and family life→
4. 04Wondering what the operation involvesTwo small cuts and about an hour→
5. 05Already living with VNSMRI scans, battery change and airport security→
6. 06Planning the surgery from abroadStay, flights and settings back home→

Who Is a Candidate for Vagus Nerve Stimulation?

VNS suits people whose seizures continue despite medicines. It also fits when surgery cannot remove the seizure source. First, however, the team checks your heart, breathing and general health.

Questions at this stage

When to Ask About VNS, and When to Call for Help

Uncontrolled seizures deserve a fresh look, even after many years. Some seizures, however, need emergency care at once.

These emergency rules follow NHS advice. So call 911 (US, Canada), 999 (UK) or 112 (rest of Europe).

How Does Vagus Nerve Stimulation Work?

The vagus nerve runs from the brainstem through the neck to the chest and belly. It carries signals both ways, so pulses sent up the nerve reach the brain (MedlinePlus).

Doctors do not fully know how this works. Still, the steady pulses seem to calm the electrical storms behind seizures.

The Parts of the Device

It has two parts: a generator and a thin lead. The generator measures about 4 cm (1.5 inches) across (MedlinePlus). The lead ends in small coils that wrap around the left vagus nerve.

Surgeons use the left nerve, which affects the heart rate less than the right. A typical setting sends pulses for 30 seconds every 5 minutes (NICE). This cycle then runs day and night.

Some newer models also sense a sudden jump in heart rate, a possible seizure sign. They then send an extra burst on their own.

Using the Magnet

You also receive a hand-held magnet. A swipe over the generator triggers an extra burst of stimulation (MedlinePlus).

So swipe it when you feel a seizure coming. A carer can also swipe it when a seizure starts. The extra burst may then stop the seizure or shorten it.

Holding the magnet over the device, in contrast, pauses the stimulation for a while. Removing it then restarts the normal cycle (NICE, MedlinePlus).

VNS Compared With Other Epilepsy Treatments

VNS sits between medicines and brain surgery. The table compares it with the main options. Our comparison of epilepsy operations then covers each one in depth.

The right option depends on where your seizures start. For deep brain targets in epilepsy, see our guide to deep brain stimulation.

Not the Same as Vagus Nerve Exercises or Ear Devices

Online, "vagus nerve stimulation" often means breathing exercises or clip-on gadgets. These differ from the implant on this page.

Non-invasive devices that rest on the neck or ear do exist. However, MedlinePlus lists their approved use as cluster headache and migraine. Ear devices for epilepsy remain under study, so ask your neurologist before you buy one.

Spinal cord stimulation, another implanted stimulator, treats chronic pain rather than seizures. For that, see spinal cord stimulation for chronic pain.

VNS Surgery Step by Step

VNS surgery takes about an hour in Prof. Albayrak's practice, under general anesthesia. It does not open the skull. Most people also go home the same day or the next (MedlinePlus).

Before the Operation

First, you have blood tests, a clotting test and an ECG. On the morning of surgery, keep taking your seizure medicines unless the team says otherwise.

Blood thinners, however, may need a pause days before. Never stop them on your own. Most people also stop eating and drinking about 8 hours before surgery.

During the Operation

1. You lie on your back, with your head turned slightly to the right.
2. The surgeon makes a small cut on the left side of the lower neck.
3. Next, the surgeon finds the vagus nerve beside the large neck vein and gently wraps the coils around it.
4. A second small cut below the left collarbone makes a pocket for the generator under the skin.
5. The lead then runs under the skin from the neck to the chest and connects to the generator.
6. Finally, a test checks that the lead and generator work together, and dissolving stitches close both cuts.

MedlinePlus puts the operation at 45 to 90 minutes. The stitches dissolve on their own, so you need no visit to remove them.

The First Days After Surgery

Expect some soreness at both cuts for a few days. You may also feel a small bump under the collarbone. Keep the wounds dry, and avoid baths and swimming until your surgeon agrees (MedlinePlus).

In Prof. Albayrak's experience, many people return to light daily activity the next day. Your voice may sound hoarse at first, since the vagus nerve serves the voice box.

Switching On and Adjusting the Device

The device starts at a low setting. Its strength then rises step by step over weeks to months. This slow pace lets your body get used to the pulses.

Some teams switch it on before discharge, while others wait 2 to 4 weeks (MedlinePlus). Either way, a doctor programs it painlessly, with a wand or tablet over the skin.

At each visit, the doctor checks your seizure diary and side effects. The settings then go up only as far as you tolerate them.

A Typical First Year With VNS

Timing varies from person to person, so your team gives you your own schedule.

What Results Can You Expect From VNS?

VNS does not cure epilepsy, and it does not work for everyone (MedlinePlus). Its aim is fewer, shorter and milder seizures, with faster recovery afterward.

One study in NICE's review followed 50 children. Of these, 23 (46%) had their seizures cut by more than half. Results vary widely, however.

UK guidance also notes that long-term evidence remains limited (NICE). So weigh the expected benefit and the risks with your team before you decide.

Will I Still Need My Seizure Medicines?

Yes, almost always, because VNS works alongside medicines. In Prof. Albayrak's practice, the usual aim is a lower dose or fewer medicines. Only your neurologist should change them, and then step by step.

Side Effects and Risks of VNS

Most side effects come from the stimulation itself. So they appear only while the device sends a pulse. They also tend to fade over time or after a change in settings (MedlinePlus).

Side Effects During Stimulation

• Hoarseness or a change in your voice
• Coughing or a tickle in the throat
• Shortness of breath
• Pain in the neck or throat
• Trouble swallowing
• Tingling in the skin
• Worse sleep apnea

In practice, a change in settings often eases these effects. If they stay unbearable, your doctor can also switch the device off.

Risks of the Operation

Every operation carries some risk. For VNS, these include infection, bleeding, and pain or swelling at the cuts (MedlinePlus).

An infection sometimes means the device must come out. In children, NICE's review found this in 3 to 6 of every 100 patients.

Harm to a nearby nerve can also occur (MedlinePlus). For example, it can leave a lasting voice change, though this stays uncommon.

Living With a Vagus Nerve Stimulator

Daily life with VNS stays mostly normal. However, three topics need planning: MRI scans, the battery and airport security.

Can I Have an MRI With VNS?

Often, yes, but only under the conditions set for your exact device. The FDA calls such implants "MR Conditional". They suit only scanner settings within their limits.

So always tell the MRI team about your VNS, and bring your device card. Before many scans, a doctor also switches the stimulation off, then back on afterward.

How Long Does the Battery Last?

Usually for several years, but stronger settings drain it faster. UK guidance from NICE quotes 8 to 10 years. In Prof. Albayrak's practice, it lasts about 6 to 15 years.

Replacing it takes a short operation through the old chest scar. In Prof. Albayrak's practice, local anesthesia usually suffices. You then go home the same day.

The lead in the neck usually stays in place. So a battery change in Istanbul often needs only a short stay.

Airport Security and Other Devices

Carry your device ID card and show it at airport security. Walk-through scanners may detect the generator, so tell the staff before you pass through.

Also tell every doctor, dentist and physiotherapist about the implant. Some heat treatments and strong magnets can affect it, so ask before any new treatment.

Vagus Nerve Stimulation for Children

VNS can also help children whose seizures continue despite medicines. MedlinePlus describes it as an option from age 4. UK guidance also asks for a specialist pediatric epilepsy team (NICE).

For a child, the decision weighs seizures against development, school and sleep. Child neurologists usually raise VNS first, and Prof. Albayrak then plans the operation with them.

NICE also asks teams to tell families clearly that no one can predict the benefit. On the other hand, its advisers noted possible gains in mood and quality of life.

Everyday Life for the Family

Parents, teachers and carers all learn to use the magnet. That way, anyone nearby can respond to a seizure. A short written seizure plan for school also helps.

VNS can also worsen sleep apnea (MedlinePlus). So mention any snoring or breathing pauses at night. For other operations in children, see pediatric neurosurgery for epilepsy and other conditions.

Other Uses: Depression and Stroke Recovery

VNS has other approved uses too, such as hard-to-treat depression and stroke recovery (MedlinePlus). This page, however, focuses on epilepsy.

For depression, VNS serves adults whose symptoms persist despite other treatment. UK guidance finds the evidence on benefit limited (NICE). So NHS teams offer it only under special arrangements.

Psychiatrists lead that decision, so discuss it with your own mental health team first.

Coming to Istanbul from the US, Canada, the UK or Europe

VNS surgery itself takes little time, but the device needs care for years. So the real planning question concerns who adjusts it after you fly home.

How Long to Stay in Istanbul

First, plan the consultation and any tests, such as an ECG and blood work. Surgery then follows, and most people go home the same day or the next.

Next, allow a few days nearby for a wound check. Altogether, that often adds up to about a week, so keep your return date flexible.

Flying Home After VNS

UK aviation guidance (CAA) advises about 7 days before flying after neurosurgery. The concern there: gas can stay inside the skull and expand at altitude. VNS, however, does not open the skull, so that concern does not apply.

Flying soon after surgery can still raise the risk of blood clots (CDC). So your surgeon confirms the flight date after a wound check. Our guide also explains when to fly home after surgery in Turkey.

Handing Over to Your Neurologist at Home

This step matters most. The settings keep rising for months. So a neurologist near home must take over.

Programming also needs equipment from the device's maker. Before you book, ask an epilepsy center near home if it can program your device.

Before you leave Istanbul, ask for your implant report and current settings. Also note the device model and serial number. Your discharge summary and scan copies help, too.

For insurance and Medicare, see planning from the US. For NHS rules and travel insurance, see planning from the UK. From Canada, check with your provincial health plan and private insurer before you book.

Your VNS Surgeon in Istanbul

Prof. Dr. Serdar Baki Albayrak

Neurosurgeon · Full Professor of Neurosurgery

Prof. Albayrak implants vagus nerve stimulators for adults and children with drug-resistant epilepsy. Before any implant, he asks the epilepsy team whether surgery could remove the seizure source. Consultations take place in English or Turkish.

He completed his neurosurgery training at Istanbul University in 2004. Clinical fellowships then followed at the University of Helsinki and Harvard Medical School. At Harvard, he trained at Brigham and Women's Hospital.

27+Years

5,000+Operations

64Countries

33Publications

Figures from Prof. Albayrak's professional profile, September 2026. See his full publication list.

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