An Inpatient Study Of The Efficacy, Safety, And Tolerability Of PF-02545920 In The Treatment Of Acute Exacerbation Of Schizophrenia

Inclusion Criteria:

- Diagnosis of schizophrenia with acute exacerbation of illness

- The current acute exacerbation of schizophrenia must be less than 4 weeks duration
prior to the initial evaluation.

Exclusion Criteria:

- Subjects with evidence or history of clinically significant uncontrolled medical
illness

- Subjects with a current diagnosis of schizoaffective disorder, major depression,
bipolar disorder, or obsessive compulsive disorder.

- Subjects who meet Diagnostic and Statistical Manual-IV (DSM-IV)defined diagnostic
criteria for psychoactive substance dependence (excluding nicotine dependence) within
12 months of screening or DSM-IV defined substance abuse within 3 months prior to
screening.