Overview Safety/Efficacy Study of Retigabine vs. Placebo in Post-Herpetic Neuralgia (PHN) Status: Completed Trial end date: 2009-12-01 Target enrollment: Participant gender: Summary The purpose of the study is to evaluate the efficacy of retigabine vs. placebo in reducing pain associated with post-herpetic neuralgia. Phase: Phase 2 Details Lead Sponsor: Bausch Health Americas, Inc.Valeant Pharmaceuticals International, Inc.Treatments: Ezogabine