In addition to its value as a mouthwash, Listerine treats acne, kills fleas on pets and acts as an emergency deodorant. It can also be used as an anti-histamine for bee stings and poison ivy and to treat toenail fungus.
The active ingredients in Listerine mouthwash are similar to those used in anti-histamine treatments, commercial acne treatments and methods used to treat and remove toenail fungus. Using Listerine on a cotton ball or pad and wiping it on feet, acne-prone skin or itchy skin helps to relieve the symptoms of that problem. A Listerine scrub, rinsed with clean water, kills fleas and flea eggs on pets.