Overview Tolvaptan Phase 3 Efficacy and Safety Study in Autosomal Dominant Polycystic Kidney Disease (ADPKD) Status: Completed Trial end date: 2012-01-01 Target enrollment: Participant gender: Summary This study's purpose is to evaluate the long-term safety and efficacy of tolvaptan versus placebo in patients with ADPKD. Phase: Phase 3 Details Lead Sponsor: Otsuka Pharmaceutical Development & Commercialization, Inc.Collaborator: Otsuka Pharmaceutical Co., Ltd.Treatments: Tolvaptan