How Gliclazide and Metformin Work: Gliclazide and Metformin is a combination of two antidiabetic medications: Gliclazide and Metformin.
Common side effects of Gliclazide and Metformin include hypoglycemia (low blood glucose level), headache, upper respiratory tract infection, dizziness, nausea, diarrhea, and flatulence.