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Side Effects of VNS Stimulation

Vagus nerve stimulation (VNS) therapy is a treatment option for severe seizure disorders. It involves placing a "pacemaker" that attaches to the left vagus nerve that helps stabilize electrical signals to the brain.

  1. Gastrointestinal

    • Gastrointestinal side effects have occurred as a result of VNS therapy, including difficulty swallowing and vomiting.

    Infection

    • Infection may occur as a result of VNS therapy, including infection of the wound resulting from device installation and also infection from device breakdown.

    Interference

    • Many items can potentially interfere with VNS functioning, including loudspeakers, hair clippers, and strong magnets, including those used during MRI scans. Consult with your physician prior to getting an MRI or other diagnostic testing.

    Time Frame

    • The rate of discontinuation of VNS stimulation is very low. Less than 3% discontinued therapy due to side effects after one year. The prevalence and severity of side effects diminished significantly over time when receiving VNS therapy.

    Medications

    • VNS is not associated with many side effects that are with associated anticonvulsant medications, including an increase in depressive symptoms and metabolic changes.

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