Taking metformin before bedtime, resulting in low fasting blood sugar can eat something first, you can promptly send to the doctor, and then follow the doctor’s advice to adjust the dose or type of medication. 1. Eat something: taking metformin before bedtime, resulting in low fasting blood sugar, you should immediately eat something, such as oral glucose or drink some juice, eat some bread, etc., to improve the symptoms of hypoglycemia. 2. Promptly send to the doctor: If the symptoms of hypoglycemia are serious or even coma, it is necessary to send the patient to the hospital for intravenous glucose infusion in time. 3. Adjustment of medication: After the patient’s blood sugar is stabilized, metformin medication needs to be adjusted. If the hypoglycemia occurs when metformin is used alone, it is necessary to reduce the dosage of metformin or change to other drugs. If metformin combined with sulfonylurea hypoglycemic drugs appear hypoglycemia, need to reduce or change the sulfonylurea hypoglycemic drugs. Specific medications need to be directed by a doctor. For the occurrence of low fasting blood glucose, it is recommended to consult a doctor in time and follow the doctor’s instructions for treatment.