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18. POTENTIAL ADVERSE REACTIONS
Potential risks associated with non-invasive vagus nerve stimulation that may be mild to
moderate:
o Transient laryngeal irritation, dysphagia, dyspnea, cough, hoarseness or change in voice tone
o Muscle twitching, discomfort, or pain during stimulation
o Dysgeusia due to treatment
The above should resolve after treatment is complete.
o Paresthesia or dysaesthesia lasting beyond the treatment period
o Skin irritation due to allergic reaction to gel
o Diarrhea, nausea/vomiting, or loss of appetite
o Sweating
o Fatigue, depressed mood
o Tinnitus
o Progression of headache symptoms
o Abnormal heart rhythm
Potential risks associated with non-invasive vagus nerve stimulation that may be moderate
to severe:
o Progression of headache symptoms
o Syncope, light-headedness, and/or dizziness
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