Mouthwash or mouth rinse is a product that is used to enhance oral hygiene. Mouth washes are aqueous solutions often in concentrated form, containing one or more active ingredients and excipients. They can be used for two purposes—therapeutic and cosmetic. Therapeutic uses include reducing plaque, gingivitis, dental caries, and stomatitis. Cosmetic uses include reducing bad breath. Flavors such as peppermint, spearmint, cinnamon, wintergreen oils, menthol, or methyl salicylate are used to overcome disagreeable tastes.

In general, mouthwashes contain antibacterial agents, alcohol, glycerin, sweetening agents, flavoring agents, and coloring agents. Mouthwashes are dispensed in white fluted bottles. The label should clearly indicate the proper directions for diluting the mouthwash before use. Moreover, the secondary label, “For external use only,” should be provided.