Chlorpheniramine maleate, has an anti-allergic effect through antagonism of H1 receptors, and also has an anti-M choline receptor effect. It is mainly used for: 1, rhinitis, such as allergic rhinitis, seasonal allergic rhinitis, vascular comfort rhinitis effective. 2, skin mucous membrane allergy, mainly for skin mucous membrane allergic diseases, such as angioedema, allergic conjunctivitis, contact dermatitis and other causes of skin itching and edema. 3, in addition to effective for children’s upper respiratory tract infections, can also be used for gastrointestinal tract allergic reactions sexual diseases.4.Drug reactions, for the prevention of blood transfusion, infusion reactions, and drug rash and other symptoms caused by drug reactions. Its use: generally oral, 1 time 4-8mg, 3 times a day; intramuscular injection, 1 time 5-20mg.