Anti-allergic drugs to stop itching antihistamines, glucocorticoids, etc., all have the role of anti-allergy, itching. 1. Antihistamines: antihistamines, commonly used drugs include chlorpheniramine maleate, phenylephrine, cetirizine, loratadine, imipramine, etc., which have the effect of anti-allergy and anti-itching, and are often used in chronic urticaria and other allergic diseases. 2. Glucocorticoid drugs: glucocorticoid has anti-inflammatory, immunosuppressive, anti-shock effects, commonly used in contact dermatitis, anaphylaxis and other allergic diseases, divided into low-effect, medium-effect, high-efficiency, such as hydrocortisone, prednisone, dexamethasone and so on. When patients have allergic symptoms, it is recommended to go to the hospital in time, under the guidance of the doctor, according to their own condition to choose the appropriate drugs, avoid self-medication, in order to avoid adverse reactions.