Nothing: Small amounts won't hurt.
Answered 5/20/2020
5.3k views
Depends on amount: Why are you repeatedly swallowing any listerine? Most versions of listerine contain high levels of alcohol as well as other chemicals which could upset your digestive tract. Listerine is meant to be rinsed, then spit out, do not swallow.
Answered 12/9/2013
5.3k views
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