Preparamycin tablets is a polyene class of broad-spectrum antifungal drugs, the activity of Candida is relatively high, also has a certain antibacterial effect on the new cryptococcus, Aspergillus. Oral is mainly applied to Candida infections in the digestive tract, such as Candida esophagitis, which is mainly manifested by spasm of the esophagus, difficulty in swallowing, and even bleeding in the upper gastrointestinal tract. In addition, it can be applied to oral Candida infection, which manifests as a milky white film adhering to the oral mucosa with clear boundaries, which will leave a moist red vesicle after peeling off. Oral infections, both acute and chronic, require that the systemic medication be contained and then swallowed to enhance the effective concentration of the drug locally in the oral cavity. It should be noted that, after oral administration, the gastrointestinal tract can not be absorbed, the blood drug is extremely low on systemic fungal infections have no therapeutic effect, the skin and local application is also almost not absorbed, when a large number of oral administration can be abdominal pain, diarrhea, vomiting and other adverse reactions.