Potassium Nitrate+Sodium Monofluorophosphate is used to prevent Dental cavities.How Potassium Nitrate + Sodium Monofluorophosphate worksPotassium Nitrate + Sodium Monofluorophosphate is a combination of two medicines: Potassium Nitrate and Sodium Monofluorophosphate. Potassium Nitrate works by calming the nerves in the teeth to reduce sensitivity from hot and cold foods. Sodium Monofluorophosphate works by making the teeth stronger and preventing decay (cavity) caused by bacteria.Common side effects of Potassium Nitrate + Sodium MonofluorophosphateNo common side effects seen