It lowers blood 100 and may increase your risk of lactic acidosis while taking Glucophage. Check your blood sugar metformin regularly as directed by your doctor. High fever, "water pills" (diuretics such as hydrochlorothiazide), too much sweating, diarrhea, or vomiting may cause loss of too much body water (dehydration) and increase your risk of lactic acidosis.
Glucophage should be taking in divided doses with meals while Glucophage XR should generally be given once daily with the evening meal. Metformin does not usually cause low blood sugar (hypoglycemia).
Be metformin to 100 your doctor and pharmacist about all the products you use (including prescription drugs, nonprescription drugs, and herbal products). Tell your doctor about the reaction right away.
Check your blood sugar carefully during a time of stress or illness, if you travel, exercise more than usual, drink alcohol, or skip meals.