A Study of QT and QTc Intervals in Patients Administered Immediate Release Paliperidone

This is an interventional treatment trial for Schizophrenia focused on measuring Schizophrenia, Schizoaffective Disorder, Mood Disorders, Antipsychotic drugs, Cardiovascular, Immediate release (IR) Paliperidone Read More

Inclusion Criteria:

• Patients must have a diagnosis of schizophrenia or schizoaffective disorder as defined by DSM-IV criteria, with no exacerbation of psychosis for at least 3 months prior to screening
• Patients must have a normal 12-lead ECG at screening and on Day -1, including: Normal sinus rhythm (heart rate between 50 and 100 beats per minute)
• QTcB interval < = 430 msec for men, < = 450 msec for women
• QRS interval <110 msec, PR interval < 200 msec
• Patients must weigh > = 50 kg ( > = 110 lb), with a body mass index > = 18 and < = 35 kg/m2
• Female patients must be postmenopausal (for at least 1 year), surgically sterile, or practicing an effective non-hormonal method of birth control (e.g., intrauterine device, double-barrier method, male partner sterilization, abstinence) before entry and throughout the study
• must have a negative serum beta human chorionic gonadotropin pregnancy test at screening
• and must have a negative urine pregnancy test within 24 hours before Day 1 of the randomization period.

Exclusion Criteria:

• Patient meets DSM-IV criteria for psychoactive substance dependence in the 3 months prior to screening
• Patient is at risk for suicidal or violent behavior, as judged by the investigator: Patient has a clinically significant abnormality on ECG at screening or on Day -1 of the study
• Patient has a heart rhythm disturbance that is known or suggested by history or that is demonstrated on ECG at screening
• Patient has a blood pressure outside of the normal range (supine systolic blood pressure <90 or >140 mmHg and/or diastolic blood pressure <60 or > 90 mmHg)
• Patient has unusual T-wave morphology in a majority of leads of the ECG (such as bifid T waves, low T waves) or prominent U waves at screening: Patient has a history of additional risk factors for torsade de pointes, such as heart failure, hypokalemia, family history of known long QT interval syndrome, or sudden unexplained death at a young age ( < = 40 years) in a first-degree relative (i.e., biological parent, sibling, or offspring)
• Patient has a relevant history of any significant and/or unstable cardiovascular, respiratory (including bronchial asthma), neurologic (including seizures or significant cerebrovascular disease), renal, hepatic, endocrine, immunologic, ophthalmologic, hematological, or other systemic disease.