Overview A Study of Vacyless® Versus Valtrex® in Patients With Herpes Zoster Status: Completed Trial end date: 2013-11-01 Target enrollment: Participant gender: Summary The purpose of this study is to compare the safety and efficacy of Vacyless® and Valtrex® in patients with acute herpes zoster. Phase: Phase 4 Details Lead Sponsor: Yung Shin Pharm. Ind. Co., Ltd.Treatments: Valacyclovir