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What should I discuss with my healthcare provider before taking famciclovir (Famvir)?
You should not take this medication if you are allergic to famciclovir or penciclovir cream (Denavir).
To make sure you can safely take famciclovir, tell your doctor if you have any of these other conditions:
FDA pregnancy category B. This medication is not expected to be harmful to an unborn baby. Tell your doctor if you are pregnant or plan to become pregnant during treatment. Herpes virus can be passed from an infected mother to her baby during childbirth. If you have genital herpes, it is very important to prevent herpes lesions during your pregnancy so that you do not have a genital lesion when your baby is born.
If you are pregnant, your name may be listed on a pregnancy registry. This is to track the outcome of the pregnancy and to evaluate any effects of famciclovir on the baby.
It is not known whether famciclovir passes into breast milk, or if it could harm a nursing baby. Do not take famciclovir without telling your doctor if you are breast-feeding a baby.
Do not give this medication to anyone under 18 years old without medical advice.
How should I take famciclovir (Famvir)?
Take exactly as prescribed by your doctor. Do not take in larger or smaller amounts or for longer than recommended. Follow the directions on your prescription label. Taking more of this medication will not make it more effective
Treatment with famciclovir should be started as soon as possible after the first appearance of symptoms (such as tingling, burning, blisters).
You may take famciclovir with or without food.
Take this medicine for the full prescribed length of time. Your symptoms may improve before the infection is completely cleared. To prevent recurrent genital herpes, you may need to take famciclovir twice daily for up to 1 year. Follow your doctor's instructions.
Lesions caused by herpes viruses should be kept as clean and dry as possible. Wearing loose clothing may help to prevent irritation of the lesions.
Store at room temperature away from moisture and heat.
Report Problems to the Food and Drug Administration
You are encouraged to report negative side effects of prescription drugs to the FDA. Visit the FDA MedWatch website or call 1-800-FDA-1088.
Need help identifying pills and medications?
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