Many patients may have this experience, not to take drugs blood glucose will be high, take drugs easy to appear dizziness, palpitations and other symptoms of hypoglycemia, this is a common phenomenon, in fact, is very dangerous, why diabetic patients are more likely to suffer from hypoglycemia, mainly for the following reasons: 1, drug hypoglycemia: diabetic patients occur hypoglycemic reaction should first consider hypoglycemic drug overdose, because the patient’s hormone regulation function decreases, and cannot secrete glucose-raising hormones, such as glucagon, epinephrine, cortisol and growth hormone in time when hypoglycemia occurs, and is often accompanied by liver and kidney insufficiency and reduced insulin clearance, which then causes hypoglycemia to be difficult to correct; 2. Excessive carbohydrate restriction or insufficient intake: the most common trigger of drug hypoglycemia is strict carbohydrate restriction, and in addition there may be diarrhea still continue Application of insulin or oral hypoglycemic drugs, resulting in hypoglycemic reaction; 3, strenuous exercise: because of its increased activity, consuming too much glucose and insufficient sugar leading to hypoglycemic reaction; 4, poor digestion and absorption ability of the elderly: causing hypoglycemia; 5, other: most patients are accompanied by hypertension, coronary heart disease and other basic diseases, which have poor response to the symptoms of hypoglycemia and aggravate the damage of hypoglycemia to the organism.