The inability to assimilate and metabolize blood glucose afflicts millions of people.people with type 1 diabetes are unable to synthesize and secrete insulin. On the other hand, people with type 2 duabetes make sufficient insulin, but the molecular pathway that respond to insulin are defective. Many gype 2 diabetic prople exhibit a condition termed insulin resistence even before the onset of diabetes. Metformin is a drug that impeove sensitivity to insulin, primarily by stimulating glucose uptake by glucose transporters in peripheral tissue. It also increse binding of insulin to insulin receptors, stimulates tyrosine kinase activity of the insulin receptor, and inhibits gluconeogenesis in the liver