trastuzumab drug pathway trastuzumab pharmacodynamics pathway 2015-12-15T09:23:32Z PW:0002353 SMP:00476 The pathway of trastuzumab-target interaction and of the biochemical or physiological responses to drug. The drug interferes with the epidermal growth factor receptor 2, overexpressed in certain cancer types. Genetic variations can cause differences in the response of the organism to the drug. pathway vpetri