Currently, for the vast majority of individuals, the medicine prescribed by a doctor is based on probability or chance. In this situation, the drug prescribed will have a greater chance of helping the average individual, while accepting the average risk of drug adverse reactions, or side-effects. However, we now have the ability to "personalize" certain medications (and many more will follow), in order to help a specific individual. We can improve the chance of an individual having the desired response to a drug and can better avoid adverse drug reactions. Our genes can greatly impact how our bodies "handle" drugs and how drugs affect our bodies. This site will provide you with an understanding of personalized medicine as it relates to drugs interacting with genes.