The causes of itching are different, taking medicine can not be cured, commonly used drugs are loratadine tablets, chlorpheniramine maleate tablets and so on. 1. Urticaria: urticaria is due to skin vasodilatation, limited edema reaction, often itchy symptoms, clinical often choose chlorpheniramine maleate tablets, loratadine tablets and other antihistamines to stop itching, used to relieve itching caused by urticaria. 2. Contact dermatitis: due to contact with external allergic or irritating substances triggered by skin inflammation, manifested as contact parts of the skin erythema, swelling, itching, etc., you can use loratadine tablets, dexamethasone hormone drugs for treatment to achieve the purpose of anti-inflammatory, anti-itching. 3. Psoriasis: genetic, environmental, autoimmune and other factors leading to chronic skin diseases, itching and pain in the skin, often used Avi a, methotrexate tablets, etc., with the effect of improving inflammation and itching. What medicine to take for pruritus needs to be decided according to the cause of the disease, and needs to be treated under the guidance of a doctor.