Famvir

Generic Name: famciclovir

Famciclovir is an antiviral drug which is active against the Herpes viruses, including herpes simplex 1 and 2 (cold sores and genital herpes) and varicella-zoster (shingles and chicken pox). It inhibits the replication of viral DNA that is necessary in order for viruses to reproduce themselves. Famciclovir is actually a "prodrug," in that it is not active directly against viruses. Instead, famciclovir is converted to penciclovir in the body, and it is the penciclovir that is active against the viruses. (Penciclovir also is available as a topical and intravenous medication.) Famciclovir is active against the same viruses as acyclovir but has a longer duration of action. Therefore, it can be taken fewer times each day. Famciclovir was approved for use by the FDA in 1994.

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Famvir Uses

Famvir is an oral antiviral prescription medication that is prescribed for: treatment of recurrent genital herpes in otherwise healthy patients; suppression of recurrent genital herpes in otherwise healthy patients; treatment of recurrent herpes simplex virus infections (genital herpes and cold sores) in HIV-infected patients and herpes zoster (shingles).

How Taken Famvir

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 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 symptoms appear.

Continue to take famciclovir even if you feel well. Do not stop taking famciclovir without talking to your doctor.

Famvir Warnings/Precautions

Do not take Famvir if you are allergic to penciclovir (Denavir) without first talking to your doctor. Before taking this medication, tell your doctor if you have kidney disease. You may need a dosage adjustment or special monitoring during treatment with Famvir. Famvir (Pregnancy Category B) should be used during pregnancy only if the benefit to the patient clearly exceeds the risk to the fetus.

Famvir Missed Dose

IF YOU MISS A DOSE OF THIS MEDICINE, take it as soon as possible. If it is almost time for your next dose, skip the missed dose and go back to your regular dosing schedule. Do NOT take 2 doses at once.

Famvir Possible Side Effects

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:

• headache
• upset stomach
• vomiting
• diarrhea or loose stools

If you experience any of the following side effects, call your doctor immediately:

• rash
• itching

Famvir Storage

Store between 15C and 30C (59F and 86F) and out of reach of children.

Famvir Overdose

Seek emergency medical attention. A Famvir overdose has no known symptoms, but an overdose of acyclovir (Zovirax), which is a similar drug, may cause seizures, hallucinations, and kidney damage (decreased urine production).

Famvir More Information

Treatment with Famvir should be started as soon as possible after the first appearance of symptoms (e.g. tingling, burning, blisters). Take all of the Famvir that has been prescribed for you even if you begin to feel better. Your symptoms may start to improve before the infection is completely treated. Herpes infections are contagious and you can infect other people, even during treatment. Avoid letting infected areas come into contact with other people. Wash your hands frequently to prevent transmission. For more information, talk to your doctor, pharmacist or health care provider.

Famvir Disclaimer

This drug information is for your information purposes only, it is not intended that this information covers all uses, directions, drug interactions, precautions, or adverse effects of your medication. This is only general information, and should not be relied on for any purpose. It should not be construed as containing specific instructions for any particular patient. We disclaim all responsibility for the accuracy and reliability of this information, and/or any consequences arising from the use of this information, including damage or adverse consequences to persons or property, however such damages or consequences arise. No warranty, either expressed or implied, is made in regards to this information.