Effects of Huanglian Jiedu Decoction as a transdermal therapeutant(Antidotal Decoction of Coptis) on the respiratory tract infection and tumor patients receiving radiotherapy and chemotherapy was clinically studied.The result revealed that the decoction alone can cure respiratory tract infection of children(Tonsillitis);the combination of the antibiotics together with the decoction produced curative effect faster than the antibiotic alone

and the time needed for recovery was shortened.During the radiotherapy and the chemotherapy

admin stration of the drug can effectively prevent patients from the infection.