Lysergic insulin is a fast-acting insulin, which can be used to control postprandial blood glucose. It is usually injected before meals, i.e., it can be injected 3 times a day, and the dosage is decided by the doctor. Insulin lysine belongs to the ultra-short-acting insulin, commonly known as fast-acting insulin, used before meals, can be a good control of blood glucose rise brought about by meals, clinical often used in conjunction with long-acting insulin, but also can be used alone in the subcutaneous insulin pump. Adverse effects of lysergic insulin are mainly hypoglycemia, in addition to systemic allergy, local injection site reactions (such as pain, bleeding, erythema, nodules, itching), weight gain, and so on. Contraindications are hypoglycemia, hypersensitivity to insulin. During the use of insulin lysine, it is necessary to pay attention to the monitoring of blood glucose changes, and adjust the dose of the drug as appropriate, in order to prevent poor glucose-lowering effect or hypoglycemic events. If the condition requires the use of insulin lysine, please go to a professional medical institution and use it under the guidance of a doctor.