Rationale for combination therapy.

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Abstract
Cardiovascular morbidity and mortality is higher in treated hypertensive patients than in normotensive subjects of the same age, sex and from the same populations. A possible and logical explanation for this could be that arterial pressure in treated hypertensive patients usually is significantly higher than in matched normotensive subjects. For these reasons it would appear logical to identify a therapeutic goal in the treatment of hypertension: to obtain normotensive blood pressure levels. In order to obtain this goal, combined treatment with more than one antihypertensive drug would appear to be required. Therapeutic combinations consisting of an ACE‐ inhibitor plus a diuretic or an ACE‐inhibitor plus a calcium antagonist constitute two examples of antihypertensive drug combinations that would appear to offer potent antihypertensive efficacy and good tolerability.