The most common forms of fructose and glucose in the clinic are fructose injection and glucose injection, which have certain differences in indications, contraindications and adverse reactions. 1. Indications: Glucose injection, the main component of which is glucose, is suitable for hypoglycemia, hyperkalemia, insufficient food or large loss of body fluids caused by various reasons; fructose injection, the main component of which is fructose, is suitable for rehydration therapy for patients who need to replenish energy or water in the state of insulin resistance or inappropriateness of glucose in the postoperative period, burns, infections, and so on. 3. Contraindications: hereditary fructose intolerance and hyperuricemia, gout patients are prohibited fructose injection treatment; diabetic ketoacidosis uncontrolled, hyperglycemic non-ketotic hyperosmolar state should not be treated with glucose injection. 4. Adverse reactions: glucose injection adverse reactions include phlebitis, reactive hypoglycemia, hyperglycemic non-ketotic coma, etc.; fructose injection adverse reactions include epigastric discomfort, pain or cramping pain, dilutional hypokalemia, urticaria, etc.. Patients who need to use fructose injection or dextrose injection should use the drug under the guidance of a doctor.