Why do you have to wait 30 minutes after using mouthwash?
Nov 4, 2023
Why do you have to wait 30 minutes after using mouthwash?
Because the active ingredients in the mouthwash need time to do their work! ... If the mouthwash contains fluoride, you should wait 30 minutes before you eat, drink or rinse. This allows enough time for the fluoride to be absorbed.