What is famciclovir used for?

What infections is famciclovir used to treat?

Famciclovir is an antiviral medicine used to treat herpes virus infections, including:
- Shingles (herpes zoster)
- Cold sores (herpes labialis)
- Genital herpes (herpes simplex virus)

It works by slowing the replication of the virus, which can reduce the duration of symptoms and help control outbreaks when started early.

Can famciclovir be used to prevent herpes outbreaks?

Yes. Famciclovir is also used to help reduce the frequency of recurrent genital herpes outbreaks in some patients, as an ongoing (suppressive) treatment strategy.

How is it typically taken?

Famciclovir is usually taken by mouth (tablets). The exact dose and schedule depend on whether you’re treating an active outbreak (like shingles or a cold sore) or using it to prevent recurrent episodes.

When does it work best?

Antivirals work best when they’re started early—especially during the initial symptoms or soon after an outbreak begins.

Sources

No sources were provided with the question.