Valgan Tablet 4 belongs to a class of drugs known as antivirals, which are used to treat cytomegalovirus (CMV) infection of the retina in adult AIDS patients. It is also used to prevent CMV infection in patients who have received an organ transplant from a CMV-infected donor. Cytomegalovirus (CMV) retinitis is a cytomegalovirus infection of the retina (light-sensing cells).Disclaimer:For More Information Contact Your Physician