A Randomized, Double-Blind, Placebo-Controlled, Parallel-Group, Dose-Response, Multicenter Study to Evaluate the Efficacy and Safety of Three Fixed Doses of Extended-Release Paliperidone in the Treatment of Subjects With Acute Manic and Mixed Episodes Associated With Bipolar I Disorder

The purpose of this study is to evaluate the effectiveness and safety of 3 different doses of paliperidone extended release (ER) compared to placebo in patients diagnosed with Bipolar I Disorder who are experiencing an acute manic or mixed episode. This study will also evaluate the effects of paliperidone extended release on global functioning, and the relationship between blood levels and the effectiveness and safety of paliperidone.