The purpose of this study is to determine how Olanzapine compares to an active comparator in the treatment of schizophrenia

Inclusion:

1. You must be between the ages of 18 and 75. If you have reached your 76th birthday, you will not be able to participate
2. You must have been diagnosed with schizophrenia
3. You must be able to visit the doctor's office as scheduled for the next 7 months

Exclusion:

1. You have a serious medical illness, such as heart, liver, or kidney disease (Note: If you are uncertain about a particular condition, discuss it with your doctor.)
2. You are either pregnant or breastfeeding