A total of 80 subjects will be enrolled in this study: 20 subjects will be randomized to receive placebo, and 60 will be randomized to receive the investigational product (20 who are on a stable dose of Seroquel, 20 who are on a stable dose of Risperdal, and 20 who are on a stable dose of Zyprexa). The investigational product or placebo will be taken 15 minutes prior to the three main meals of the day. Subjects will continue to take their prescribed anti-psychotic medications. Participation in this study involves four study visits.
