Do not swallow. In the event of accidental swallowing, get medical help or contact a Poison Control Center right away. You may experience shedding of the cheek lining or gum tissue during initial use. If this continues, or if you experience any new pain, discomfort or irritation of gum and other mouth issues, stop use and see a dentist.
Do not use if printed LISTERINE® band around cap is broken or missing.
Do not use this product if you:
Are under 18 years old
Have a history of kidney stones, or kidney disease, have difficulty absorbing fats in foods (fat malabsorption syndrome), or take high doses of Vitamin C (1,000 mg or more per day)
Are allergic to any of these ingredients
Have any other sources of pain in the mouth such as tooth decay. If tooth pain/sensitivity still persists after 4 weeks of use or worsens at any point, please visit your dentist.