Famciclovir

Famciclovir

Antivirals Prescription only ATC code: J05AB09

Prescription status is set country by country — the label where you live is the one that applies.

Beta: the medication section is still being tested, and its data may contain errors. Do not rely on it for a decision about your own treatment.

Typical dose
250–500 mg
3× a day

A usual adult range, not a national label — the dose and the timing differ by country and by product.

Used for

  • Viral infection

Approved uses differ by country — some of these may be off-label or unapproved where you live.

Worth knowing

  • Caution with kidney disease
  • Headache is a common effect

Markers to watch

Reference information, not medical advice. Discuss any change with your doctor.