Dose escalation may proceed once >= 3 subjects have completed the Day 29 blood sample to evaluate glucose. The safety of each dose level will be established prior to enrollment of subjects in the next dose level. Dose escalation will proceed sequentially with accelerated titration. Once the criteria for completing the accelerated titration are reached, dose escalation will follow a modified Fibonacci schedule. Up to 6 subjects will be enrolled at each dose level. Enrollment will proceed until the maximum tolerated dose (MTD) has been established or the highest dose level (800 mg/day) has been reached.