List of products in the National Drug Code with proprietary name . Ganciclovir is an anti-viral drug. It is used to prevent disease caused by a virus called cytomegalovirus (CMV) in people who have received organ or bone marrow transplants. CMV disease can lead to serious infections in the body, including an infection in the eye, called CMV retinitis, that can cause blindness. Ganciclovir is also used to treat people with weakened immune systems (including people with AIDS) who have CMV retinitis. Ganciclovir works by slowing the growth of the CMV virus. It helps control CMV retinitis and decrease the risk of blindness. It also helps prevent the spread of infection to other areas of the body. Ganciclovir is not a cure for CMV disease. Some people may have worsening CMV retinitis even with treatment. Therefore, it is important to have your eyes checked regularly by your doctor.