The prevention of stroke through the control of hypertension is cost-effective economically and medically. A reduced incidence of stroke generates savings to the health service in hospital and surgical costs, and the avoidance of premature mortality means survivors contribute more to the economy as a result of extra working years. In addition to financial benefits, antihypertensive agents can also improve a patient's quality of life. This can be measured with a variety of health profiles or indexes and is often expressed together with life expectancy in quality-adjusted life years. This article examines the benefits produced by the effective control of hypertension, taking data from England and Wales during the past 30 years.