the study of how genes affect a person's response to drugs is known as:
TODAY. 1  Doctors are increasingly aware that genetic variationscan cause different patients to respond in different ways to the same medication. The study of how genes affect the way a person responds to medicines is called pharmacogenetics or pharmacogenomics. Advances in understanding the genetic basis of individual drug responses come from the NIH Pharmacogenomics Research Network (PGRN) (http://www.nigms.nih.gov/Initiatives/PGRN).