Two hours after taking metformin blood glucose 11.2mmol / L, still high, this situation may be the drug to take the wrong time, the drug dose is insufficient or improper diet and other factors, the specific causes vary from person to person, it is recommended that the patient go to the hospital to consult with the doctor, strictly comply with the doctor’s instructions to take hypoglycemic drugs. 1. Taking the drug at the wrong time: Metformin has different dosage forms and specifications, and its dosage is also different. For example, metformin hydrochloride tablets are taken during or immediately after meals, metformin hydrochloride enteric capsules are taken half an hour before meals; and metformin hydrochloride extended-release tablets are taken during or after meals. 2. Insufficient dosage of drugs: the effect of drug dosage on the role of drugs is very obvious, if the dose is too large, it may cause toxic side effects; if the dose is small, it will not be able to play the role of drugs, prolonging the treatment time, but also may be the case of recurring disease. 3. Improper diet: In terms of diet, diabetic patients should control the total calorie intake. According to the patient’s standard body weight, the calories consumed by daily activities, calculate the total calorie needs of the day, specifically divided into three meals a day, each meal should be limited to the type of food and intake. If too much food is eaten, its intake of calories is too much, which will lead to postprandial blood glucose increase. Therefore, patients who still have high postprandial blood glucose after taking hypoglycemic drugs need to first check whether the drugs are taken in the wrong way and whether they have eaten too much, and if not, consult a doctor for treatment in time.