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What is Famciclovir used for?

Famciclovir is an antiviral drug used to treat infections caused by herpes viruses, which include genital herpes, cold sores, chicken pox, and shingles. This medicine slows the growth and spread of the herpes virus in the body. It relieves pain, burning, itching, and tingling associated with herpes infections. This medicine may also be used to treat other conditions as determined by your doctor.

What is the recommended dosage of Famciclovir?

The dosage of Famciclovir prescribed to each patient will vary. Always follow your physician’s instructions and/or the directions on the prescription drug label.

Famciclovir can be taken with or without food. Take each dose with a full glass of water.

What if you miss a dose of Famciclovir?

If your physician has instructed or directed you to take Famciclovir medication in a regular schedule and you have missed a dose of this medicine, take it as soon as you remember. However, if it is almost time for your next dose, then skip the missed dose and go back to your regular dosing schedule. Do not double the doses unless otherwise directed.

What if you overdose on Famciclovir?

Any medication taken in excess can have serious consequences. If you suspect an overdose of Famciclovir, seek medical attention immediately.

What other drugs could interact with Famciclovir?

  • Probenecid

It may be noted that drugs other than those listed above may also interact with Famciclovir.

Usually drug interactions occur when it is taken with another drug or with food. Before you take a medication for a particular ailment, you should inform the health expert about intake of any other medications including non-prescription medications, over-the-counter medicines that may increase the effect of Famciclovir, and dietary supplements like vitamins, minerals and herbal, so that the doctor can warn you of any possible drug interactions.

Do let your doctor know if you smoke, consume alcohol or caffeinated drinks, or use illegal drugs as these may interfere with the action of your medication. Make sure to inform your doctor of any medical conditions you may have, or any family history of medical problems. Do not start or stop using any medicine without consulting your doctor.

What are the side effects of Famciclovir?

Like other medicines, Famciclovir can cause some side effects. If they do occur, the side effects of Famciclovir are most likely to be minor and temporary. However, some may be serious and may require the individual to inform the doctor or visit the nearest hospital immediately.

It is pertinent to note that side effects of Famciclovir cannot be anticipated. If any side effects of Famciclovir develop or change in intensity, the doctor should be informed as soon as possible.

Famciclovir can cause side effects such as nausea, vomiting, stomach pain, diarrhea, flatulence, headache, and dizziness. This is not a complete list of all side effects. Do concur with your doctor and follow his directions completely when you are taking Famciclovir.

What are the questions to ask your doctor before taking Famciclovir?

Is it possible for me to take Famciclovir with other drugs?
Should certain beverages, foods and other products be avoided when I take Famciclovir?
What are the possible drug interactions of Famciclovir?
How will Famciclovir work in my body?
How should Famciclovir be taken?
How to reduce the risk of Famciclovir drug interactions and side effects?


The health and medical information provided here is intended to supplement and not substitute for the expertise and judgment of your physician, pharmacists or other health care professional. It should not be understood to indicate that the use of Famciclovir is safe, appropriate or effective for you. Always consult your health care professional before using this, or any other, drug.


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