Mitiglinide, a benzylsuccinic acid derivative, exerts selective action on the ATP-dependent K (KATP) channel of pancreatic β-cells and reportedly possesses a stronger affinity to the channel compared with other insulinotropic sulphonylurea receptor ligands, namely repaglinide and nateglinide. Preprandial administration of mitiglinide efficiently reduces postprandial hyperglycemia and improves overall glycemic control.