Reply To: Borei Nefashos: Swallowed mouthwash

Mouthwashes may contain one or more of the following poisonous ingredients* that can be harmful if swallowed at high doses:

-Fluoride (sodium fluoride)

-Chlorhexidine gluconate

-Ethanol (ethyl alcohol)

-Hydrogen peroxide

-Methyl salicylate

*Compilation from NYTimes Health Guide pages on Fluoride and Mouthwashes; some ingredients may be missing from this list.