Huasu tablet is also called Sidi Iodine Tablet, the main ingredient is molecular iodine, and the excipients are sucrose, Sidi Iodine, magnesium stearate and so on. It is not an antibiotic, but it is a kind of over-the-counter drug with many uses in dentistry and ENT, and is widely used clinically, mainly for the treatment of chronic pharyngitis, oral ulcers, chronic gingivitis and periodontitis. The main pharmacological effect is that it has a very strong antiseptic effect, which can oxidize the epidemic genes in the cytoplasm of cells and bacteria, and combine with the amino groups of proteins, which can denature the viruses and bacteria, thus killing them. Its bactericidal power is proportional to its concentration, and its antiseptic and irritant properties to the organism are also proportional to its concentration. At present, clinically speaking, Wassup tablets should not be considered as a type of antibiotic yet.