Genomics is the study of whole genomes of organisms, and absorb elements from genetics. It uses a combination of recombinant DNA, DNA sequencing methods, and bioinformatics to sequence, assemble, and analyse the structure and function of genomes.
Pharmacogenomics is the study of how genes affect a person's response to drugs. This relatively new field and combines pharmacology (the science of drugs) and genomics (the study of genes and their functions) to develop effective, safe medications and doses that will be adapt to a person's genetic makeup. It aims to develop rational means to optimize drug therapy, with respect to the patient genotype, to ensure maximum efficiency with minimal adverse effects.