Vagus Nerve Stimulation (VNS) is a neurostimulation therapy that involves the implantation of a device within the body to stimulate the vagus nerve, which plays a crucial role in regulating various bodily functions. The device sends mild electrical impulses to the vagus nerve, which then relays these signals to areas of the brain responsible for controlling mood, anxiety, and seizures. VNS has been approved by the FDA for treating epilepsy and depression in patients who have not responded well to traditional treatment methods. Clinical studies have shown promising results in reducing seizure frequency and improving mood in individuals with treatment-resistant epilepsy and depression. Overall, VNS is considered a safe and effective therapeutic option for patients with refractory epilepsy or depression who have not seen improvement with medication alone.