... receiving intensive insulin therapy together with some oral hypoglycemic agents, theirglycemic control remained poor. Sitagliptin was added to the ongoing therapeutic regimen to provide betterglycemic ... diabetes and one with fea-tures of both ty pe 1 and type 2 diabetes) where the addi-tion of sitagliptin to the on going insulin therapy wasconsiderably effective in the patients whose insulin secre-tory ... Cefalu WT, Chen Y, Luo E, Musser B,Andryuk PJ, Ling Y, Kaufman KD, Amatruda JM, Engel SS, Katz L: Efficacy and safety of sitagliptin when added to insulin therapy in patients withtype 2 diabetes....