Ganciclovir side effects include decreased blood sugar, diarrhea, peripheral discomfort, and hair loss. Ganciclovir is mainly used for cytomegalovirus retinitis caused by immune impairment, prevention of cytomegalovirus infection in organ transplant recipients, and cytomegalovirus infection in patients with advanced AIDS. Patients may experience adverse reactions such as thrombocytopenia and neutropenia after use of the drug. This product can cause damage to the fetus, it is recommended to use contraception before the use of the drug, for patients with renal insufficiency, close detection of serum creatinine clearance to avoid abnormalities. It is contraindicated for those who are allergic to this product and acyclovir. If you want to use ganciclovir, it is recommended to go to a regular hospital to consult a doctor and use the drug under the doctor’s guidance, and not to use the drug without authorization.