- Drug-naïve (HbA1c < or = 9.0%); OR Prior monotherapy, submaximal doses of metformin (< or = 1000mg Metformin), sulfonylureas (< or = 5mg Glyburide, < or = 10mg Glipizide or < or = 8mg glimepiride) or full dose Januvia (100mg) (HbA1c < or = 8.5%); OR Prior monotherapy, > submaximal doses of metformin (>1000mg) or sulfonylureas (>5mg Glyburide, >10mg Glipizide or >8mg glimepiride) (HbA1c < or = 7.0%)