Elevated arterial pressure is probably the most important public health problem. about 30% of the world adult population are affected by hypertension in industrialised countries. Development of a pharmacogenomic approach to the therapy of primary hypertension give new opportunities for the treatment of hypertension. This approach consists in the identification of the genetic-molecular mechanisms responsible for hypertension in a given subset of patients, and in the development of drugs able to interfere with such mechanisms, thus leading to very selective therapeutic interventions with enhanced efficacy and reduced side effects.