Drug-gene testing, also called pharmacogenomics or pharmacogenetics, is the study of how your genes affect your body's response to medications. The word "pharmacogenomics" is combined from the words pharmacology (the study of the uses and effects of medications) and genomics (the study of genes and their functions). Your body has thousands of genes that you inherited from your parents. Genes determine which characteristics you have, such as eye color and blood type. Some genes are responsible for how your body processes medications. Pharmacogenomic (PGx) tests or look for changes or variants in these genes that may determine whether a medication could be an effective treatment for you or whether you could have side effects to a specific medication.
PGx testing can improve clinical outcomes while simultaneously decreasing healthcare costs. Reduction in lengthy trial-and-error periods during the selection of a new pharmacotherapy, along with treatment intervention for Adverse Drug Events and serious drug interactions, have not only emerged to improve patient care, but also to reduce costs in the clinic.