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Famvir (famciclovir) is an antiviral drug. It slows the growth and spread of the herpes virus so that the body can fight off the infection. Famvir will not cure herpes, but it can lessen the symptoms of the infections. Famvir is used to treat infections caused by herpes viruses. Illnesses caused by herpes viruses include genital herpes, cold sores, shingles, and chicken pox.
Before taking famciclovir, tell your doctor or pharmacist if you are allergic to Famvir or to penciclovir or if you have any other allergies and your medical history, especially of: kidney problems. Kidney function declines as you grow older. This medication is removed by the kidneys. Older adults may be more sensitive to the side effects of this drug, especially dizziness, drowsiness, confusion, and change in the amount of urine.
This medication may contain lactose. If you have certain conditions such as galactose intolerance, severe lactase deficiency (not lactose or milk intolerance), or glucose-galactose malabsorption that require you to restrict your intake of lactose, consult your doctor or pharmacist before taking this medication.
Famciclovir does not protect against the spread of genital herpes. To lower the chance of giving herpes to your partner, do not have sexual contact during an outbreak or if you have symptoms. You can spread genital herpes even if you do not have symptoms. Therefore, always use an effective barrier method (latex or polyurethane condoms/dental dams) during all sexual activity.
During pregnancy, this medication should be used only when clearly needed. Discuss the risks and benefits with your doctor. It is not known if this medication passes into breast milk. It may have undesirable effects on a nursing infant. Consult your doctor before breast-feeding.
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