FamvirFamciclovir is used to treat herpes zoster (shingles) and genital herpes. It does not cure herpes infections but decreases pain and itching, helps sores to heal, and prevents new ones from forming.
This medication is sometimes prescribed for other uses; ask your doctor or pharmacist for more information.
FAMVIR DRUG INFO
Why is this medication prescribed?
Famciclovir is used to treat herpes zoster (shingles) and genital herpes. It does not cure herpes infections but decreases pain and itching, helps sores to heal, and prevents new ones from forming.
This medication may be prescribed for other uses; ask your doctor or pharmacist for more information.
How should this medicine be used?
Famciclovir comes as a tablet to take by mouth. It is usually taken every 8 hours (three times a day) for 7 days to treat shingles. To treat genital herpes it is usually taken twice a day for 5 days. Follow the directions on your prescription label carefully, and ask your doctor or pharmacist to explain any part you do not fully understand. Take famciclovir exactly as directed. Do not take more or less of it or take it more often than prescribed by your doctor. Use this medication as soon as possible after your symptoms first appear.
Continue to take famciclovir even if you feel well. Do not stop taking famciclovir without talking to your doctor.
What are the issues I should discuss with my healthcare provider before taking Famvir?
Avoid consuming famciclovir if you are allergic to penciclovir (Denavir) without first talking to your doctor.
Before taking Famvir, inform your physician if your kidneys are diseased. You and your physician may need to make adjustments to your dosage during the course of treatment. Special monitoring during treatment with famciclovir may also be advised.
Famciclovir is in the FDA pregnancy category B. This means that it is unlikely to harm an unborn baby. Do not take famciclovir without first talking to your doctor if you are pregnant, or attempting to concieve.
It is not known whether famciclovir passes into breast milk. Do not take famciclovir without first talking to your doctor if you're nursing a baby.
The safety and efficacy of famciclovir have not been established for children younger than 18 years of age.
What special dietary instructions should I follow?
Famvir has the potential to cause an upset stomach. Take famciclovir with food or milk.
What should I do if I forget a dose?
Take the missed dose as soon as you remember it, and take any remaining doses for that day at evenly spaced intervals. However, if it is almost time for the next dose, skip the missed dose and continue your regular dosing schedule. Do not take a double dose to make up for a missed one.
What side effects can this medication cause?
Although side effects from famciclovir are not common, they can occur. Tell your doctor if any of these symptoms are severe or do not go away:
- upset stomach
- diarrhea or loose stools
If you experience any of the following side effects, call your doctor immediately:
What storage conditions are suggested for this medication
Keep this medication in the container it came in, tightly closed, and out of reach of children. Store it at room temperature and away from excess heat and moisture (not in the bathroom). Throw away any medication that is outdated or no longer needed. Talk to your pharmacist about the proper disposal of your medication.
In case of Famvir emergency/overdose
In case of overdose, call your local poison control
center immediately at 1-800-222-1222. If the person is unresponsive or
is not breathing, contact local emergency services immediately at
What other information should I know?
Keep all appointments with your doctor and the laboratory. Your doctor will order certain lab tests to check your response to famciclovir.
Do not have sexual intercourse when you can see the genital herpes lesions. However, genital herpes can be spread even when there are no symptoms.
Do not let anyone else take your medication. Ask your pharmacist any questions you have about refilling your prescription. If you still have symptoms of infection after you finish the famciclovir, call your doctor.