For the next 4 days at about the same time as your first infusion, you will be prepared for treatment with ZIO-101. Before each injection, you will be asked how you feel, an ECG will be performed, and a small sample of blood (about 2 teaspoons) will be drawn for PK tests. The Day 1-4 infusions will also each take about 1 hour. In total you will receive 5 daily injections of ZIO-101. On Day 4 at the end of the infusion, another sample of blood will be drawn (about 5 teaspoons) to measure arsenic levels in your blood.