How many milligrams of gliclazide extended-release tablets you need to take for a blood sugar of 12.8 mmol/L needs to be done as prescribed by your doctor. Blood glucose 12.8 mmol/L is still high if it is fasting blood glucose; if it is 2 hours after a meal or random blood glucose, it is on the high side. The general usage of the extended-release dosage form of gliclazide is 30-120mg once/day. But exactly how many doses of gliclazide extended-release tablets need to be taken, it is recommended to follow the doctor’s advice, because each person’s physique and tolerance are different, and need to individualize the development of sugar-lowering program. Gliclazide extended-release tablets are used for adults with type 2 diabetes whose blood sugar levels are not adequately controlled by diet therapy, exercise therapy and weight loss alone. Its use is by mouth and is intended for adults only. It is recommended to be taken with breakfast and swallowed whole, not chewed or crushed. As with all hypoglycemic agents, the dose should be adjusted according to the patient’s metabolic response. Adverse reactions such as hypoglycemia, sweating, nausea and vomiting may occur with the use of this drug. Patients who are allergic to any components of this drug, severe hepatic or renal insufficiency, type 1 diabetes, diabetic ketoacidosis and other patients are required to prohibit it. In addition, it is recommended that patients use Gliclazide extended-release tablets under the guidance of a doctor, do not take the drug at will to avoid adverse consequences.