What is this medicine?
FAMCICLOVIR (fam SYE kloe veer) is an antiviral medicine. It is used to treat or prevent infections caused by certain kinds of viruses. Examples of these infections are herpes and shingles. This medicine will not cure herpes.
How should I use this medicine?
Take this medicine by mouth with a glass of water. Follow the directions on the prescription label. You can take it with or without food. Take your medicine at regular intervals. Do not take your medicine more often than directed. Take all of your medicine as directed even if you think you are better. Do not skip doses or stop your medicine early.
Talk to your pediatrician regarding the use of this medicine in children. Special care may be needed.
What side effects may I notice from receiving this medicine?
Side effects that you should report to your doctor or health care professional as soon as possible:
allergic reactions like skin rash, itching or hives, swelling of the face, lips, or tongue
Side effects that usually do not require medical attention (report to your doctor or health care professional if they continue or are bothersome):
unusually weak or tired
What may interact with this medicine?
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.
Where should I keep my medicine?
Keep out of the reach of children.
Store at room temperature between 15 and 30 degrees C (59 and 86 degrees F). Throw away any unused medicine after the expiration date.
What should I tell my health care provider before I take this medicine?
They need to know if you have any of these conditions:
an unusual or allergic reaction to famciclovir, penciclovir, other medicines, food, dyes, or preservatives
pregnant or trying to get pregnant
What should I watch for while using this medicine?
Tell your doctor or health care professional if your symptoms do not improve. This medicine works best when started very early in the course of an infection. Begin treatment at the first signs of infection.
Drink 6 to 8 glasses of water or fluids every day while you are taking this medicine. This will help prevent side effects.
You can still pass the shingles or herpes to another person even while you are taking this medicine. Avoid contact with others as directed. Genital herpes is a sexually transmitted disease. Talk to your doctor about how to stop the spread of infection.