What happens if you accidently swallowed a little listerine that expired in 7/20

Probably nothing... and I hope you threw it out, since it has expired and won't do you any good at this point. Get a fresh bottle.:)Um...nothing except maybe a slight stomach ache from the high alcohol content, flavorings, and other chemicals. Just don't make a habit of it!Nothing....you will be fine maybe just a stomache ache but I doubt it.nothing ... it just means that it's not as effective as it was prior to the expiration date .. if you swallowed some you may get a stomach ache but nothing major. You'll be fine