This study is for patients with autosomal dominant polycystic kidney disease (ADPKD). The purpose of this study is to test the effectiveness of a study drug called tolvaptan. Tolvaptan continues to be studied in this trial as a possible treatment for ADPKD. ADPKD is a disease that causes kidney…
The main purpose of this research study is to determine the effect of the study drug compared to placebo in increasing red blood cell counts and reducing the severity of symptoms of Sickle Cell Disease (SCD). A placebo is a dummy drug: it looks like the study drug but contains no medicine. Subjects being asked to take part in…