Pharmacogenetics and Pharmacogenomics lecture will be dealing with interaction of genetics and polymorphism on drug pharmacokinetic and pharmacodynamics parameters. The aim of this course is to deal with the basis of gene therapy, genetic variation in the effects of drugs and xenobiotic substances on the body, and in the body’s reactions to drugs, translational, and pharmaceutical research, and application of genomic technologies to new drug discovery. Genetically engineering drugs and their application in treatment of certain diseases such as cancer, diabetes, heart problems, Alzheimer’s and other neurodegenerative diseases and atherosclerosis will be also considered. While genetic variation is an important parameter on drug interactions, the contributions of epigenetic and non-genetic factors to drug disposition and drug response will be explained in this lecture.