Famciclovir tablets

What are famciclovir tablets?
FAMCICLOVIR (Famvir®) is an antiviral agent. Famciclovir relieves the symptoms of herpes zoster infection (shingles) or genital herpes infection. Famciclovir will not cure shingles or genital herpes; it will help the blisters heal faster and reduce the duration of pain and discomfort. Famciclovir is also used to reduce the number of episodes of genital herpes infection. Generic famciclovir tablets are not yet available.

What should my health care professional know before I take famciclovir?
They need to know if you have any of these conditions:

  • kidney disease
  • an unusual or allergic reaction to famciclovir, acyclovir, ganciclovir, valacyclovir, valganciclovir, other medicines, food, dyes, or preservatives
  • pregnant or trying to get pregnant
  • breast-feeding


How should I take this medicine?
Take famciclovir tablets by mouth. Follow the directions on the prescription label. Take the tablets with a full glass of water. Famciclovir may be taken with food or without food. Take your doses at regular intervals. Do not take your medicine more often than directed. Finish the full course prescribed by your prescriber or health care professional even if you think your condition is better. Do not stop taking except on your prescriber’s advice.

Contact your pediatrician or health care professional regarding the use of this medicine in children. Special care may be needed.

What if I miss a dose?
If you miss a dose, take it as soon as you can. If it is almost time for your next dose, take only that dose. Do not take double or extra doses.

What drug(s) may interact with famciclovir?

  • probenecid

Tell your prescriber or health care professional about all other medicines you are taking, including non-prescription medicines. Also tell your prescriber or health care professional if you are a frequent user of drinks with caffeine or alcohol, if you smoke, or if you use illegal drugs. These may affect the way your medicine works. Check with your health care professional before stopping or starting any of your medicines.

What side effects may I notice from taking famciclovir?
Side effects that you should report to your prescriber or health care professional as soon as possible:

  • confusion
  • skin rash, itiching , hives

Side effects that usually do not require medical attention (report to your prescriber or health care professional if they continue or are bothersome):

  • diarrhea
  • dizziness
  • headache
  • tiredness
  • nausea, vomiting

What should I watch for while taking famciclovir?
If famciclovir is used to treat (rather than prevent) an infection, it should be taken when you first notice symptoms of infection, such as tingling, itching, or pain in the affected area. Tell your prescriber or health care professional if your symptoms do not improve within a few days of starting famciclovir.

Drink several glasses of water a day while taking this medicine.

Keep affected area of blisters as clean and dry as possible. Wear loose-fitting clothing, and do not cover the area with an occlusive (plastic or waterproof) dressing.

Famciclovir does not prevent the spread of genital herpes infection to others. Genital herpes is transmitted by sexual contact. You should avoid sex when lesions are present to avoid infecting your partner. Genital herpes can also be spread when symptoms are not present. Therefore, latex condoms should be used at all times during sexual intercourse.

Where can I keep my medicine?
Keep out of the reach of children in a container that small children cannot open.

Store at room temperature between 15-30 degrees C (59-86 degrees F). Throw away any unused medicine after the expiration date.

Johns Hopkins patient information

Copyright 1996-2014 Cerner Multum, Inc. Version: 16.02.
Revision date: July 7, 2011
Last revised: by Tatiana Kuznetsova, D.M.D.

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CONDITIONS OF USE: The information in this database is intended to supplement, not substitute for, the expertise and judgment of healthcare professionals. The information is not intended to cover all possible uses, directions, precautions, drug interactions or adverse effects, nor should it be construed to indicate that use of a particular drug is safe, appropriate or effective for you or anyone else. A healthcare professional should be consulted before taking any drug, changing any diet or commencing or discontinuing any course of treatment.

The drug reference included in this section is provided by Cerner Multum, Inc., of Denver, Colorado. Armenian Medical Network receives monthly updates from Multum.