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Famciclovir works as the main active ingredient used in different medications to treat viral infections like cold sores and genital herpes. It is a diacetyl 6-deoxy prodrug of the antiviral agent penciclovir. The active component works against the Herpes viruses, such as herpes simplex 1 and 2 and varicella-zoster. It acts by inhibiting the replication of viral DNA by obstructing with DNA polymerase. It works as a DNA Polymerase Inhibitor.

Class of Drugs – An antiviral drug

Molecular Formula – C14H19N5O4

Molecular Weight – 321.33 g/mol

Working: This active agent restricts the herpes viruses from reforming and infecting more cells in the body. Penciclovir becomes very active inside the cells of the body that are infected with herpes viruses. This activated penciclovir blocks the action of a viral enzyme called DNA polymerase.

Uses: This is an antiviral drug active against the Herpes viruses, such as simplex 1 and 2. It treats cold sores, genital herpes, and varicella-zoster. It blocks the spread of the herpes virus in the body by preventing the replication of viral DNA.

Famciclovir is an active drug against the same viruses. This ingredient stops the spread of herpes infections. This medication relieves pain, burning, itching, and tingling. It also heals and prevents sores caused by herpes infections.

Popular Brands and Dosages: The given antiviral drug is indicated for the treatment of herpesvirus infections, most commonly for herpes zoster. Famciclovir is available in popular brands as follows:

  • Famvir: 125 mg, 250 mg, and 500 mg

Do not change the dosages without consulting with the doctor.