The offered 500mg famciclovir tablets offered by us that is also used to treat returning herpes simplex infections of the skin and mucus membranes (mouth, anus) in people with human immunodeficiency virus (HIV) infection. Famciclovir is in a class of medications called antiviral. It works by stopping the spread of the herpes virus in the body. Famciclovir is an antiviral medicine that is used to treat infections caused by herpes viruses, including genital herpes, cold sores, and shingles. The 500mg famciclovir tablets are very useful.