physiologically acceptable films , such as water - soluble films , are disclosed . the films include a water - soluble film - forming polymer such as methylhydroxypropylcellulose and / or sodium alginate . edible films are disclosed that include methylhydroxypropylcellulose and / or sodium alginate , emulsifier , breath freshening agents , stabilizing agents , plasticizers , surfactants , disintegrants , and preservatives . the edible films may be used to deliver an effective amount of an agent for killing bacteria that causes such maladies as dental plaque , gingivitis , bad breath , or the like . the film may optionally contain pharmaceutically active agents .