Treatment with conventional antipsychotics such as haloperidol has little effect or may sometimes even worsen negative symptoms (such as blunted affect, emotional withdrawal, and poor rapport) of schizophrenia. The newer "atypical" antipsychotics agents, such as olanzapine, has shown improvement in the treatment of negative symptoms in acute trials. The purpose of this study is to compare an investigational compound (asenapine) with a marketed agent (olanzapine) in the treatment of stable subjects with persistent negative symptoms of schizophrenia for 6 months. Patients completing this study may be eligible to participate in an extension 6 months of treatment. Patients are required to have stable symptoms prior to entry into study.

Inclusion Criteria:

• Have a documented current diagnosis of schizophrenia of paranoid, disorganized, catatonic, residual, or undifferentiated subtype with persistent negative symptoms.
• No increase in level of psychiatric care during the past few months due to worsening of symptoms of schizophrenia.
• Caregiver required.

Exclusion Criteria:

• Have an uncontrolled, unstable clinically significant medical condition.
• Have any other psychiatric disorder other than schizophrenia as a primary diagnosis including depression.

Adverse events (AEs) were recorded at each visit through end of treatment in this protocol (6 months). For subjects who did not continue in an extension protocol, serious adverse events (SAEs) were recorded via telephone 30 days after end of treatment.

Information regarding AEs was obtained by questioning or examining the

subject at each visit, and recording complaints and symptoms.

Reports are for all SAEs and treatment-emergent nonserious AEs.