A Randomized, Open-Label, Multi-Center Study To Evaluate The Efficacy And Safety Of Intramuscular Ziprasidone In Patients With Agitation

Inclusion Criteria: * Male or female Chinese subjects aged 18-65 years (including 65) at screening. * Subjects meeting the ICD-10 (Classification of Mental and Behavioral Disorders) criteria for schizophrenia (F20.X). * Subjects who are in acute phase of schizophrenia and are appropriate to receive intramuscular medication for at least 3 days Exclusion Criteria: * History of clinically significant physical illness especially myocardial infarction, non compensatory heart failure etc. * Subjects receiving an investigational agent in the previous 3 months prior to screening. * Use of antipsychotic agents within 12 hours or parenteral benzodiazepines within 4 hours prior to randomization and during the study.