For example, original formula Listerine is about 54 proof with 26.9% alcohol, and many of the mint flavored mouthwashes are almost 22% alcohol. The alcohol content of Scope weighs in at 18.9%, and Cepacol at 14%. When compared to beer (3% to 7% alcohol), wine (12%), and even some liquors and distilled spirits, these products are concentrated sources of ethanol.