Hypersensitivity to metformin or any component of the formulation; renal disease or renal dysfunction (serum creatinine ≥1.5 mg/dL in males or ≥1.4 mg/dL in females) or abnormal creatinine clearance from any cause, including shock, acute myocardial infarction, or septicemia; acute or chronic metabolic acidosis with or without coma (including diabetic ketoacidosis).
Note: Temporarily discontinue in patients undergoing radiologic studies in which intravascular iodinated contrast media are utilized.