- Have been treated for longer than 2 weeks with any of the following excluded medications within 3 months prior to screening: Insulin; Sulfonylureas; Alpha-glucosidase inhibitors (e.g., Glyset® [miglitol] or Precose® [acarbose]); Meglitinides (e.g., Prandin® [repaglinide] or Starlix® [nateglinide]); Dipeptidyl peptidase (DPP)-4 inhibitors (e.g., Januvia™ [sitagliptin], Galvus® [vildagliptin]); Symlin® (pramlintide acetate).