Iodine allergic reactions can occur immediately after the drug is administered or after several hours. The main reactions include the following: I. Mild reactions: hives, flushing, salivation, sneezing, tearing, chest tightness, shortness of breath, nausea and vomiting. Mild allergic reactions can be relieved within a short time without special treatment; Second, severe reactions: 1, manifested as laryngeal and bronchial spasm, which can cause shortness of breath and respiratory distress; 2, angioneurotic edema, which can be seen as a large area of rash, skin and mucous membrane hemorrhage and pulmonary edema, etc.; 3, anaphylactic shock, coma, convulsions, etc.; 4, which can result in cardiac arrest, and severe reactions require emergency treatment. For neurovascular edema, intramuscular injection of isoprinosine 25-50 mg, laryngeal or bronchial spasm, subcutaneous or intramuscular injection of 0.1% epinephrine, 0.5-1 ml, or aminophylline 0.5-1.5 g, intravenous drip hydrocortisone 100-40 mg, or intramuscular injection of dexamethasone 5-10 mg, in order to inhibit the allergic reaction in the organism. In addition to this, oxygen, tracheal intubation, artificial respiration, cardiac compression, antiepileptic and antishock treatments are given according to the situation.