Efficacy and Safety of Armodafinil as Adjunctive Therapy in Schizophrenic Adults With Cognitive Deficits

Key Inclusion Criteria: * The patient has a diagnosis of schizophrenia according to the DSM-IV-TR criteria as determined by the SCID and has been clinically stable in a nonacute phase of their illness for at least 8 weeks prior to the baseline visit. * The patient has received treatment with olanzapine, oral risperidone, or paliperidone for schizophrenia for at least 6 weeks prior to the screening visit and has been on a stable dose of olanzapine, oral risperidone, or paliperidone for at least 4 weeks prior to the screening visit. The patient is prepared to remain at these stable dosages for the duration of the study. * The patient is a man or woman 18 through 60 years of age. * The patient is in good health (except for the diagnosis of schizophrenia) as judged by the investigator on the basis of medical and psychiatric history, medical examination, ECG, serum chemistry, hematology, and urinalysis. * Women of childbearing potential must use a medically accepted method of contraception and must agree to continue use of this method for the duration of the study and for 30 days after participation in the study. * The patient must be willing and able to comply with study restrictions, to remain at the clinic for the required duration during the study period, and to return to the clinic for the follow-up evaluation as specified in this protocol. Key Exclusion Criteria: * The patient has any Axis I disorder, including schizoaffective disorder and sleep disorders, apart from schi…