Ingredient

Famciclovir

Famciclovir is an antiviral medication used to treat herpes virus infections.

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MFDS ingredient code M250929

What does it do?

Famciclovir is an antiviral agent used for the treatment of patients infected with the herpes virus. This agent works by inhibiting the replication of the virus, preventing the spread of infection. It is primarily utilized in the treatment of shingles and herpes simplex.

Famciclovir is converted in the body to its active metabolite, penciclovir, which interferes with the viral DNA synthesis. This prevents the virus from multiplying and suppresses the infection. Therefore, it helps to slow the progression of symptoms and aids in recovery.

Commonly used for

Approved uses differ by product. Check each product's information for its actual use.

Good to know

Famciclovir has a mechanism of action similar to acyclovir but has a higher oral bioavailability, allowing for effective treatment. Additionally, it is characterized by fewer side effects compared to other antivirals and greater ease of administration.

Medicines containing this ingredient

Even with the same ingredient, strength, dosage form and how it is taken can differ.

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Even with the same ingredient, dosage and approved uses can differ by strength, dosage form and combined ingredients. Check each product's information before taking it.

Questions about this ingredient

  • QI heard it's similar to Acyclovir, but how is it different?

    The explanatory materials state that famciclovir acts similarly to acyclovir but has higher oral bioavailability. Since both ingredients have similar effects, please be careful not to take them together on your own, and follow your doctor's prescription regarding which medication to use.

    Answers 1 · 2026.09.14

  • QIs Famciclovir used for shingles?

    Yes, famciclovir is an antiviral agent used to treat herpes virus infections, such as shingles and herpes simplex. It is converted into the active metabolite penciclovir in the body, which interferes with the viral DNA synthesis and inhibits replication.

    Answers 1 · 2026.09.14

For anything that needs medical judgment, consult a doctor or pharmacist.

SourceKorea Ministry of Food and Drug Safety (Drug Safety Korea)

Product approval information is based on drug information provided by the Ministry of Food and Drug Safety.
Ingredient and class descriptions are not part of MFDS data and were written separately by Cashdoc.
Consult a doctor or pharmacist for accurate dosage, administration, and usage instructions.