Using a common antibacterial mouthwash for a week can lower nitrite levels in saliva, which might make it easier for tooth decay to develop.

Using a common antibacterial mouthwash for a week can lower ammonia levels in saliva, which might make it harder for the mouth to maintain a healthy environment.

Using a common antibacterial mouthwash for a week can increase sugar and lactic acid levels in saliva, which might make it easier for tooth decay to develop.

Using a common antibacterial mouthwash can increase the number of certain bacteria that produce nitrite, but actually makes those bacteria less effective at producing nitrite.

Using a special mouthwash for a week killed some good bacteria in the mouth, which made less nitrite in saliva and blood, and this caused blood pressure to go up a little bit.

Using a common antibacterial mouthwash for a week can make saliva more acidic and less able to neutralize acids, which might make tooth decay more likely.