- Subjects with a clinically significant neurological, metabolic, hepatic, renal, hematological, pulmonary, cardiovascular, gastrointestinal, and/or urological disorder (e.g. unstable angina, decompensated congestive heart failure, CNS infection or history of HIV seropositivity), which would pose a risk to the patient if they were to participate in the study or that might confound the results of the study.