<prompt> Metformin is NOT effective in lowering of blood sugar level in which of the following patients?Non diabeticsObese diabeticsType 2 diabeticsDiabetics not responding to sulfonylureas  <response>: Ref:KDT 6e p269 Metformin is the drug of choice for the treatment of obese diabetic patients, as it causes weight loss. It does not cause release of insulin, therefore less chances of hypoglycemia. 