Recurrent eruptions can be treated with one of the following: Acyclovir 400 mg orally 3 times a day for 5 days Valacyclovir 500 mg orally every 12 hours for 3 days Famciclovir 1000 mg orally every 12 hours for 1 day For frequent eruptions (eg, > 6 eruptions a year), suppressive antiviral therapy with one of the following may be used: Acyclovir 400 mg orally every 12 hours Valacyclovir 500 to 1000 mg orally once a day Famciclovir 250 mg orally every 12 hours Doses should be adjusted for renal insufficiency.