I encountered this claim (here):
Listerine (and related mouth washes) probably do not eliminate bad breath. Although it may be effective at first, in the long term it generally increases bad breath by drying out the mouth and inhibiting the salivary glands. This may also increase the population of dental bacteria. Most top dentists recommend avoiding mouth wash or using it very sparingly.
The claim is given in context with seven other claims, and we are told that four of them are true.
I use mouthwash occasionally, and I would use it more regularly if I were more confident it didn't have negative health consequences. Is this claim true?