New gene targets for disease susceptibility and therapeutic intervention only provide a starting point in the long and difficult process of incidence of a particular disease and drug discovery. The incorporation of genetic information into the routine prescribing of drugs may become standard to avoid serious toxicity with narrow therapeutic index drugs, and to maximize the likelihood of a positive response in the individual patient. However, genomics and genetic variations in particular amongst individuals will have an important impact in understanding of the molecular nature of diseases and...