Betadine Gargle and Mouthwash contains povidone iodine which kills a wide range of germs including bacteria, viruses, fungi, spores and simple organisms. Betadine Gargle and Mouthwash is used for the treatment of acute infections of the lining of the mouth and throat, for example, inflammation of the gums (gingivitis) and mouth ulcers. For cleansing the mouth (oral hygiene) before, during and after dental and mouth surgery.