Cidofovir Products | Cleanchem - Cidofovir is an antiviral drug used primarily for the treatment of cytomegalovirus (CMV) infections in immunocompromised individuals, such as those with HIV/AIDS. It works by inhibiting viral DNA synthesis, thus preventing the replication of CMV. Cidofovir is usually administered intravenously and can be used in the treatment of CMV retinitis and other viral infections. Side effects include nephrotoxicity, nausea, and metabolic acidosis.