You are required to monitor your glucose (sugar) levels at home during the first 2 months you are taking the study drug. If the doctor thinks it is needed, you may be asked to continue monitoring your glucose (sugar) levels at home. The study staff will give you a glucose monitor (called a glucometer) and teach you how and when to use it. You will bring the glucometer with you to each study visit so the study staff can collect the results of the testing.