Famvir, medically known as famciclovir, is an antiviral medication used to control shingles (herpes zoster) and genital herpes. It relieves itchiness and pain caused by herpes infections, and blocks the development of new sores.

This medicine comes as a tablet taken by mouth, two to three times daily, as prescribed by your doctor.

Famvir may cause some side effects including headache, tiredness, vomiting, upset stomach, nausea, diarrhea, skin itchiness or rash.

Famvir is also used in the treatment for recurring infections of the muscous membranes (lips and mouth) and skin caused by the herpes virus, or other medical conditions, as suggested by your doctor.

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