Hypersensitivity. Acute or chronic metabolic acidosis, including lactic acidosis or diabetic ketoacidosis, w/ or w/o coma; diabetic pre-coma; eGFR persistently <45 mL/min/1.73 m
2; acute conditions w/ the potential to alter renal function eg, dehydration, severe infection, shock, or intravascular administration of iodinated contrast agents; acute or chronic disease which may cause tissue hypoxia eg, cardiac or resp failure, pulmonary embolism, recent MI, shock, acute significant blood loss, sepsis, gangrene, pancreatitis; during or immediately following surgery where insulin is essential, elective major surgery; hepatic impairment; acute alcohol intoxication, alcoholism. Lactation.