Gliclazide extended-release tablets can generally be taken for a long period of time, so there is no uniform statement of the maximum length of time you can take, the medication should be under the guidance of a doctor. Gliclazide extended-release tablets is a western medicine, the type of medicine for hypoglycemic drugs, can be taken to treat adults with type 2 diabetes with diet therapy, exercise therapy and weight loss is not enough to control blood sugar levels. Type 2 diabetes is a chronic disease that requires long-term use of hypoglycemic medication to control the progression of the disease, so gliclazide extended-release tablets need to be taken for a long time. Gliclazide extended-release tablets are contraindicated in patients who have become allergic to the drug, and if adverse reactions occur after taking the drug, such as nausea, vomiting, dizziness, you need to stop taking the drug immediately, and if the symptoms are not relieved after stopping the drug, you need to go to the hospital in time to consult a doctor.