User:Mr. Ibrahem/Penciclovir

Penciclovir, sold under the brand name Denavir among others, is a medication used to treat herpes infection of the lip (cold sores). It reduces the time to healing from 8 to 7 days. It is applied to the area of infection.

Common side effects include irritation at the site of application. Use in pregnancy appears to be safe. It is a nucleoside analogue and is similar to acyclovir. Famciclovir is a precursor medication of penciclovir.

Penciclovir was approved for medical use in the United States in 1996. In the United States it costs about US$800 for a 5 gram tube of cream as of 2021. It is more expensive than other equally useful medications.