Study of the long-term efficacy and safety of bifeprunox in the treatment of schizophrenia. Extension to study S154.3.001.

Inclusion Criteria:

diagnosis of schizophrenia, understand nature of study, able to be managed in out-patient setting for long-term bifeprunox treatment

Exclusion Criteria:

current primary diagnosis other than schizophrenia, suicide risk, diagnosis or history of substance abuse, uncontrolled hypertension