Metformin is an oral hypoglycemic agent of the biguanide class, and glimepiride is an oral hypoglycemic agent of the sulfonylurea class frequently used to treat Type-II diabetes mellitus. Under certain conditions, overdose or long-term use of metformin and glimepiride can cause lactic acidosis and hypoglycemia. Metformin overdose can cause severe hypoglycemia in the absence of other anti-diabetic drugs. Potential mechanisms of metformin-induced hypoglycemia include decreased hepatic glucose production, decreased glucose absorption, and low oral intake. Hypoglycemia, in turn, leads to loss of consciousness, headache, confusion, and neurological symptoms such as insomnia, delirium, and in rare conditions may lead to coma, seizures, and death....