 - Have been on the same doses for 3 months of any approved combination of 2 oral antihyperglycemic medications in any combination of the following: sulfonylureas e.g. Chlorpropamide or Diabinese, Glimepiride or Amaryl, Tolbutamide or Orinase, Tolazamide or Tolinase, Glipizide or Glucotrol, Glyburide also known as Micronase, Diabeta, or Glynase, biguanides e.g. Glucophage or metformin, thiazolidinediones e.g. Rosiglitazone or Avandia, or Pioglitazone or Actos, or dipeptidyl peptidase 4 DPP-IV inhibitors e.g. Sitagliptin or Januvia. A combination pill of any 2 of these drugs is allowed 1 only, e.g. Metformin and Glipizide or Metaglip, e.g. Metformin and Glyburide or Glucovance, e.g. Pioglitazone and Glimepiride or Duetact, or e.g. Sitagliptin and Metformin or Janumet. 