10. A negative urine pregnancy and toxicology screen. Verbal affirmation will be obtained (i.e., "not pregnant" and "not currently using psychotropic drugs or during the past 3 months") during the Screening Visit (Day 1). Urine screen will be obtained on Days 2 and 3. If subject reports that there is a "possibility that she is pregnant" on Day 1 (Screening Visit) a urine pregnancy screen will be performed on that day.