Hypertension is an important public health challenge worldwide because of its high prevalence and concomitant increase in risk of disease. Hypertension is currently a devastating medical, social and economic problem. Hypertension affects more than one billion people throughout the world. It is an important risk factor for developing other cardiovascular diseases, stroke, renal failure, cerebrovascular accidents, and many other medical complications. The comparative Risk Assessment Collaborating Group has identified hypertension as the leading global risk factor for mortality and as the third leading risk factor for disease burden.