Pharmacogenomics is that the study of the role of the order in drug response. Its name (pharmaco- + genetics) reflects its combining of medical specialty and genomics. Pharmacogenomics analyzes however the genetic makeup of a personal affects his/her response to medication. It deals with the influence of nonheritable and inheritable genetic variation on drug response in patients by correlating organic phenomenon or single-nucleotide polymorphisms with pharmacology (drug absorption, distribution, metabolism, and elimination) and pharmacodynamics (effects mediate through a drug's biological targets). The term pharmacogenomics is commonly used interchangeably with genetic science. though each terms relate to drug response supported genetic influences, genetic science focuses on single drug-gene interactions, whereas pharmacogenomics encompasses a additional genome-wide association approach, incorporating genetics and epigenetics whereas handling the consequences of multiple genes on drug response.