What is the difference between Glucophage and Glucophage XR?

Glucophage is a prescription medication that is used along with diet and exercise to treat Type 2 diabetes. The active ingredient in Glucophage tablets is metformin, a type of medication called a biguanide that works by decreasing the liver's production of sugar, decreasing the amount of sugar absorbed by the intestines, and increasing the body's sensitivity to its naturally-produced insulin. In this way, Glucophage helps lower blood sugar levels. Glucophage is available in two forms: regular tablets and extended-release tablets called Glucophage XR. There are also generic versions of Glucophage that are available in a variety of strengths. Glucophage should be taken by mouth, usually twice a day with food. For this medication to be effective, you should always take Glucophage exactly as prescribed by your doctor.