Dexamethasone Compound is a film preparation used for the treatment of mouth ulcers. It is a compound ingredient, the main ingredients of which include chlorhexidine hydrochloride, vitamin B2, dexamethasone sodium phosphate and dacronin hydrochloride. Among these four ingredients, dexamethasone sodium phosphate belongs to the glucocorticoid class of drugs, so it can be said that the compound chlorhexidine dexamethasone film contains hormones. The main effect of dexamethasone sodium phosphate is to play an anti-inflammatory and anti-allergic effect, which can relieve the symptoms of mouth ulcers. The compound chlorhexidine is an antibacterial drug with strong antibacterial activity against common oral pathogens, which also has a positive charge and can be adsorbed on the surface of the mouth after use, thus exerting an antibacterial effect. In addition, vitamin B2 is a vitamin B element that can also be used to treat mouth ulcers as an adjunct to treatment. In addition, Dacronin plays a local pain-relieving effect, which relieves the symptoms of mouth ulcers from the perspective of pain relief. Combining the main mechanisms and efficacy of these four drugs, the drug is acting as a synergistic treatment for mouth ulcers. The dexamethasone sodium phosphate inside this drug is a glucocorticoid, so it can be said that this drug contains glucocorticoids inside.