The Efficacy of Vildagliptin Concomitant With Insulin Therapy in Type 2 Diabetic Subjects

Daisuke Ito, Kazuyuki Inoue, Kimie Kaneko, Morifumi Yanagisawa, Takashi Sumita, Yuichi Ikegami, Takuya Awata, Hitoshi Ishida, Shigehiro Katayama, Kouichi Inukai

Abstract


Background: In Japan, dipeptidyl peptidase 4 (DPP4) inhibitors have become standard therapeutic agents for type 2 diabetes, and numbers of patients receiving insulin therapy combined with DPP4 inhibitors, which is a highly effective regimen, are increasing.

Methods: In this study, we evaluated the efficacy of vildagliptin administered at the dose of 100 mg twice daily in 57 patients with type 2 diabetes already receiving insulin treatment.

Results: The 36 patients who simply received add-on vildagliptin showed a 0.6% decrease in HbA1c levels, despite a marked insulin dose reduction, mainly bolus insulin, of approximately 8.3 units. In addition, body mass index exhibited a significant negative correlation with the efficacy of vildagliptin, i.e., ΔHbA1c. On the other hand, the 21 patients switched from 50 mg of sitagliptin to vildagliptin showed HbA1c decreases approaching 0.7%.

Conclusion: Taking into consideration that twice-daily oral vildagliptin has already been reported to be advantageous in reducing postprandial hyperglycemia, this drug was suggested to be more effective in reducing HbA1c than sitagliptin under conditions in which it is used as a supplement to basal insulin, as in this study.




J Clin Med Res. 2015;7(5):303-307
doi: http://dx.doi.org/10.14740/jocmr2057w


Keywords


Type 2 diabetes; Insulin therapy; Vildagliptin; Sitagliptin

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