Pharmacogenomics is the study of how genes affect a person’s response to drugs. This relatively new field combines pharmacology (the science of drugs) and genomics (the study of genes and their functions) to identify effective, safe medications and doses that will be tailored to a person’s genetic makeup. Pharmacogenomic testing helps evaluate which drugs will be more suited to an individual, and therefore be more effective, as well as identify drugs which will have less adverse effects on the individual.