Metformin and sitagliptin fixed combination as the optimal choice in solving current problems in the type 2 diabetes mellitus treatment

Abstract

The complex pathogenesis of type 2 diabetes mellitus (DM) is the basis for providing the therapeutic treatment for various disorders, which ensures a better glucose-lowering potential and maintenance of glycemic control as the disease progresses. A key reason for poor glycemic control is clinical inertia, which can be overcome by using antidiabetic fixed-dose combinations (FC). Their use improves glycemic control, as the multidirectional action of the combination components on the pathogenetic mechanisms of type 2 diabetes leads to increased pharmacological effects. The PK of metformin and sitagliptin is preferable in terms of glucose-lowering efficacy, safety and clinical benefits. The mechanism of action of metformin is not associated with the stimulation of insulin secretion by β-cells, but results from the drug’s effect on insulin sensitivity at the level of the liver, muscle and adipose tissue, although the effect on hepatic glucose production is the prevailing one. The mechanism of action of sitagliptin, a highly selective inhibitor of dipeptidyl peptidase-4, is additional to the basic pharmacological effects of metformin, which are caused by several mechanisms not associated with stimulation of insulin secretion by β-cells. The simultaneous use of sitagliptin and metformin has additive effects on the increase of glucagon-like peptide-1 levels. This action is implemented through various mechanisms, while metformin increases the release, and sitagliptin inhibits the active degradation of glucagon-like peptide-1. The article emphasizes the importance of rational combinations of glucose-lowering drugs, the need for a personalized approach to the choice of medicines. The current possibilities of sugar-reducing therapy, the issues of efficacy, safety and benefits of PK of metformin and sitagliptin are discussed using modern evidence-based data.