Patient Information

What is Vagus Nerve Stimulation?

Vagus nerve stimulation sends electrical signals along a nerve, called the vagus nerve, parts of which run through the neck to the brain. For many years, vagus nerve stimulation has been used to treat various disorders, such as epilepsy and depression, in thousands of patients.*

How does it work in Cluster Headaches and Migraine?

It is not certain how vagus nerve stimulation treats and prevents migraines and cluster headaches, but data suggest that it may work by sending signals into the brain that reduce the amount of a substance, called glutamate, that has been associated with headache symptoms.** Please go to our Videos page for a suggested Mechanism of Action

What is gammaCore®?

The gammaCore therapy is administered with a non-invasive hand held device that produces a mild electrical signal that is transmitted to the vagus nerve through the skin.

Why gammaCore®?

The gammaCore therapy provides a safe and effective non-invasive treatment for migraines, cluster and some other headaches, without the side effects associated with drugs. The device is portable and easy to use. It can easily be incorporated into your daily routine.

What are the possible side effects?

Very rarely, you may experience hoarseness, shortness of breath, or change in voice. A tingling/pricking feeling where the device is applied is normal but should not cause major discomfort. These effects usually stop right away once the treatment is completed.

Who cannot use it?

gammaCore therapy should not be used by people with an implanted device such as a pacemaker, hearing aid implant, or any implanted electronic device. It should not be used in people who are diagnosed with narrowing of the arteries (carotid atherosclerosis) or those who have had surgery to cut the vagus nerve in your neck. Your doctor will help you decide if the treatment is right for you. For full prescribing information, refer to the gammaCore Patient Instructions for Use that are available on request.

How do I use it?

The gammaCore therapy is administered with a hand held device, about the size of a mobile phone. A conductive gel is applied on the stimulation surfaces of the device and it is placed on the neck. A thumbwheel is used to turn up the stimulation strength until you feel a mild sensation underneath the skin. Each treatment takes approximately 90 seconds. Please go to our Videos page to view gammaCore How To Use Instructions.

What should I expect?

Results vary from person to person. You may experience immediate relief if you use gammaCore right when your symptoms or headache starts. If you use the device several times a day as a preventative therapy, you may also notice a decrease in the severity, duration, and frequency of headaches. It is possible that you may be able to reduce or eliminate the use of your headache medications when administering the gammaCore therapy. Your doctor will help determine the best treatment therapy for you.

Where can I get more information about gammaCore?

Talk to your doctor. You and your doctor will determine if the gammaCore therapy is a suitable treatment option for treating your headache. If you would like to provide your physician with additional information about gammaCore, please fill out the Contact request form on this site or call 877-490-2653.

I am a new gammaCore Patient.  Is training available?

Absolutely!  We offer both online training and 1:1 training for all new gammaCore patients.  The online training is available by following this link but is password protected.  You will be contacted and provided with this login information when your initial device is shipped.  If, for some reason you are not contcted please contact us at 877-490-2653.  You will also be asked to schedule individual training with your local representative.  This may be in person, by telephone, or video conference.

How to Order

gammaCore must first be recommended to you by your Canadian based and licensed physician who in turn must be familiar with gammaCore and gammaCore Certified.  If your physician feels that gammaCore might benefit your condition your physician will provide you with a gammaCore Recommendation Form for you to complete and forward to this office by fax (1-604-896-1657) or email ( The device will be shipped to you directly or to your doctor’s office according to your instructions. Once we have set you up as a customer re-orders can be placed by contacting our office at 877-490-2653.  The costs of the gammaCore therapy are currently not covered by public or private health insurance services. For information on price, and availability please contact us as follows:


Phone (Canada): 1-877-490-2653



* Data on file

** Results seen in the animal study may not represent a direct correlation with results seen in humans. Animal Data on file.


For more information please contact SeaKa Products Inc., Box 38 Squamish, BC V8B 0A1. 877-490-2653