Hypersensitivity. Acute metabolic acidosis eg, lactic acidosis, diabetic ketoacidosis; diabetic pre-coma; acute conditions w/ potential to alter renal function eg, dehydration, severe infection, shock, intravascular administration of iodinated contrast agents; acute or chronic disease causing tissue hypoxia eg, cardiac or resp failure, recent MI, shock, pulmonary embolism, acute significant blood loss, sepsis, gangrene, pancreatitis; during or immediately following surgery where insulin is essential, elective major surgery. Patients w/ CKD stage 4 or 5 (severe renal impairment eg, on dialysis; eGFR <30 mL/min/1.73 m
2 or CrCl <30 mL/min) or eGFR persistently <45 mL/min/1.73 m
2 or CrCl persistently <45 mL/min (CKD stage 3B). Hepatic impairment, acute alcohol intoxication, alcoholism. Lactation.