Pharmacogenomics and Its Role in Precision Medicine

This white paper defines pharmacogenomics and outlines its significance in precision medicine. It describes how genotypes influence drug metabolism and provides examples of how genotyping can affect drug choices. The document explains that pharmacogenomics aims to match drug-related metabolic genotypes with appropriate drugs and dosages, potentially reducing medical costs and adverse drug events (ADEs). It details the complex processes involved in drug metabolism, including the roles of various enzymes and transporter proteins. The paper also discusses how genetic mutations can impact drug metabolism, categorizing them into loss-of-function, gain-of-function, and neutral mutations. Furthermore, it explains the importance of understanding an individual's metabolizer phenotype for ensuring effective drug administration. The document highlights the application of pharmacogenomics in oncology, particularly with tamoxifen in breast cancer treatment, illustrating its potential to guide drug dosing and improve patient outcomes.