Cidofovir is an antiviral medication that prevents certain viral cells from multiplying in your body. Cidofovir is used to treat an eye infection called cytomegalovirus retinitis (CMV) in people who have AIDS (acquired immunodeficiency syndrome). Cidofovir is not a cure for CMV or AIDS. Cidofovir is for treating CMV only in people who have AIDS. Cidofovir may also be used for purposes not listed in this medication guide.
Vistide is a cytomegalovirus nucleoside analog DNA polymerase inhibitor that when used in conjunction with probenecid is taken to treat retinitis due to cytomegalovirus in people with AIDS and is known to decrease the risk of blindness. Vistide is an antiviral drug, which does not destroy the targeted pathogen but instead inhibits their development, therefore slowing it down to prevent further spreading of the virus.