PAMAM(CYD grade) dendrimers penicilloyl carrier used as IgE antibody inhibitors show good inhibition performance. There were clear differences in the capacity of the different dendrimers and butylamine conjugate to bind to specific IgE antibodies.This indicates that a concentration of butylamine approximately 100 fold higher than that for PAMAM penicilloylated is needed to obtain the same percentage inhibition.