Limit alcohol use with Metformin

Patient: Hello, Im a diabetic since last March 2009…I take Metformn 500 mg oral but I continue to drink wine…what harm could i be cause?

Doctor: Metformin can rarely cause a serious condition called lactic acidosis. Lactic acidosis is more likely to occur in patien ts who have kidney or liver disease, severe congestive heart failure, recent heart attack, recent stroke, heavy alcohol use, dehydration or sepsis. If you have normal liver function, taking metformin and drinking small amounts of alcohol (< 2 units per day) should have no adverse effects.