Insulin accidentally shot more than 4 units, you should monitor blood glucose, observe whether hypoglycemia occurs, if there is no symptom can not be treated, if hypoglycemic reaction should be given sugar water or sugary food, if the symptoms do not improve or significantly aggravated, it is recommended to consult a doctor in time for intravenous glucose supplementation. A common adverse reaction to insulin is hypoglycemia, which may occur if an extra 4 units are given. Blood glucose should be monitored and candies, cookies, sugar water, etc. should be prepared. If blood glucose is low or symptoms of hypoglycemia such as panic, hand tremor, weakness, sweating, etc. occur, sugar water or sugary food should be given in time. If the symptoms do not get better or worsen significantly, it is recommended to consult a doctor for intravenous glucose supplementation in time. Patients taking insulin should strictly follow the dosage and injection method instructed by the doctor and eat regularly. Insulin should be used under the guidance of a doctor, do not use on your own.