Jung CH, et al. - Researchers compared the long-term efficacy and safety of gemigliptin vs gemigliptin treatment after once-daily treatment with sitagliptin 100 mg, in the patient with type 2 diabetes. Administration of gemigliptin 50mg daily to metformin for 52 weeks was found to be efficacious. Consistent glycemic control was noted by switching from sitagliptin 100mg to gemigliptin 50mg over the previous treatment.