Overview 8-Week Study of Tolvaptan Dose Forms in Autosomal Dominant Polycystic Kidney Disease (ADPKD) Status: Completed Trial end date: 2013-07-01 Target enrollment: Participant gender: Summary The purpose of this study is to compare the short-term effects of two tolvaptan formulations in patients with ADPKD. Phase: Phase 2 Details Lead Sponsor: Otsuka Pharmaceutical Development & Commercialization, Inc.Treatments: Tolvaptan