Ganciclovir has cytomegalovirus-inhibiting properties and can be used to prevent and treat conditions associated with cytomegalovirus infection. Ganciclovir can inhibit the replication of cytomegalovirus and reduce viral activity, and is mainly used clinically for the prevention and treatment of visually or life-threatening cytomegalovirus-infected immunodeficient patients, as well as for the prevention of cytomegalovirus-related organ transplant patients. Adverse effects of ganciclovir mainly include anemia, diarrhea, abdominal pain, fever, cough and candidiasis. Contraindications to ganciclovir include hypersensitivity to valganciclovir, ganciclovir, and any other ingredient. Precautions for ganciclovir mainly include this drug has the effect of teratogenicity and carcinogenicity, and should be applied with caution; during the application period, platelet count and complete blood count should be detected; after the use of the drug may appear dizziness, ataxia and other adverse reactions, which can affect the body to operate machines and drive, with related occupations, should be applied with caution. If you need to apply this drug, you must confirm the diagnosis after seeking medical treatment, follow the doctor’s instructions to apply, do not abuse the drug.