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. Author manuscript; available in PMC: 2018 Apr 5.
Published in final edited form as: MMWR Recomm Rep. 2015 Jun 5;64(RR-03):1–137.
Recommended Regimens

Acyclovir 400 mg orally twice a day
 OR
Valacyclovir 500 mg orally once a day*
 OR
Valacyclovir 1 g orally once a day
 OR
Famiciclovir 250 mg orally twice a day

*Valacyclovir 500 mg once a day might be less effective than other valacyclovir or acyclovir dosing regimens in persons who have very frequent recurrences (i.e., ≥10 episodes per year).