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"gammaCore SapphireTM is the first and only FDA cleared non-invasive device to treat and prevent multiple types of headache pain via the vagus nerve. It’s small, handheld and portable for quick and easy treatments whenever and wherever needed."
"Unlike an implanted vagus nerve stimulator or other migraine and cluster headache treatments, the gammaCoreTM non-invasive vagus nerve stimulator, otherwise known as nVNS, activates the vagus nerve with gentle electrical stimulation through the skin via the neck. Helping to prevent and relieve headache pain without pills, injections and drug-like sides effects."