If your blood sugar is still high after taking metformin, you should consult a doctor and choose to continue the original treatment plan, increase the dose of metformin or add other kinds of glucose-lowering drugs or insulin according to your own situation under the doctor’s guidance, and pay attention to adjusting your lifestyle. Metformin is the first-line glucose-lowering drug, after taking the drug or high blood sugar, may be due to the course of treatment is too short, you can continue to take the drug to observe for a period of time. You can also increase the dose of metformin or add other kinds of hypoglycemic drugs, such as acarbose, miglitol, dagliflozin, etc., and insulin can also be added if necessary. Adjustments to the treatment regimen must be made strictly under medical supervision. Common adverse reactions to metformin include gastrointestinal reactions, skin allergies and lactic acidosis, and it is contraindicated in patients with serious complications, alcoholism, and severe renal insufficiency. In addition to taking medication, patients with high blood sugar also need to pay attention to adjusting their lifestyle, healthy diet and appropriate exercise. Taking metformin blood sugar is still high, you should go to the hospital, under the guidance of the doctor to adjust the glucose-lowering drugs.