Glucophage is a diabetes drug. The main target of Glucophage is to control the level of sugar in the blood. It is useful for the two kinds of diabetes. Glucophage may also be useful in other cases, which are not described here. You may use this medicine alone or in complex with insulin or others drugs. Glucophage is fobidden for using if you have kidney problems. It's also is not useful in the case of diabetic ketoacidosis. Glucophage can lead to lactic acidosis. The probability of lactic acidosis may be greater if you have liver problems, kidney problems, heart failure or a history of heart problems. If you have an allergy to Glucophage or to some components it consists of don't use it. If you have an allergy to some drugs related to Glucophage you should also avoid using of it. It's not dangerous for pregnancy and it doesn't bring harm to a new born child. But if you are going to be pregnant or already pregnant you should talk about using of Glucophage with your doctor. You should also ask your doctor if this medicine could be compound with other drugs you are taking. You should have consultancy with your doctor before using Glucophage to prevent negative effects.