MS-1014
A 54-year-old man with a history of type II diabetes mellitus presents for a routine check-up. He reports no symptoms of increased urination or thirst. Laboratory results reveal an HbA1c level of 67 mmol/mol and a random plasma glucose level of 15.6 mg/l. The patient is currently taking metformin, and his physician decides to add gliclazide to his medication regimen. What is the mechanism of action of gliclazide?