Cediriodine is bactericidal against type B hemolytic streptococci, anaerobic digestive streptococci, and if the concentration is increased, it will kill all of them, and it can be used to treat localized infectious diseases of the oral cavity and pharynx, and it has a good medicinal effect. Usually, Cediriodine can also play a good bactericidal and antibacterial effect on bacterial propagules, spores and fungi. Cediriodine is indicated for patients with chronic pharyngitis, recurrent mouth ulcers, or erosive lichen planus, as well as Candida albicans infection, chronic gingivitis, or periodontitis. However, it is recommended not to use it if there is an allergy to iodine products, and because iodine can pass through the placental barrier after absorption, it should not be used by pregnant or breastfeeding women. Often, in cases of chronic gingivitis and periodontitis, a rapid improvement can be seen with cediriodine tablets.