An Efficacy and Safety Study of Plecanatide in Adolescents 12 to <18 Years of Age With Chronic Idiopathic Constipation

The purpose of the study is to evaluate efficacy, safety, and pharmacokinetics (PK) of oral Plecanatide 0.5, 1.0 and 1.5 mg tablets dosed once a day as compared to matching placebo, when administered for 8 weeks in adolescents with chronic idiopathic constipation. This study will consist of a 4-week screening period, 8 weeks of treatment, and a 2-week follow-up. The study will assess the effects of Plecanatide on bowel movement frequency and other clinical features of CIC.