, and the Valaciclovir International Study Group 1998 A randomized, placebo-controlled comparison of oral valacyclovir and acyclovir in immunocompetent patients with recurrent genital herpes infections Arch.
Oral acyclovir, however, in dosages ranging from 400 to 1,000 mg daily, was effective in reducing by 50 to 78 percent the frequency of herpes labialis following UV light exposure.