Ganciclovir for EBV usually needs to be used for 7 to 10 days, but this varies from person to person. Ganciclovir is mainly used for the treatment and prevention of cytomegalovirus infections and belongs to the anti-herpesviral group of drugs.Epstein-Barr virus (EBV) is a member of the herpesvirus family Lymphotropic viruses, and humans are the hosts of EBV infections, which are mainly transmitted through saliva. Asymptomatic infections occur most often in young children; more than 90% of young children aged 3 to 5 years have been infected with EBV, and more than 90% of adults have antibodies to the virus. Ganciclovir is also used to treat EBV for about 7 to 10 days. The use of ganciclovir may cause adverse reactions such as bone marrow suppression, granulocytopenia, abnormalities in liver and kidney function, and high blood pressure. If you feel unwell, or the effect is not good, you should suspend the use of the drug and go to the hospital for examination. The drug is contraindicated for those who are allergic to ganciclovir, and it is recommended to use the drug under medical supervision.