[Efficacy-safety relationship of AT1 angiotensin II receptor antagonists: current data].

In evolution of hypertension's treatment it may no be sufficient to lower blood pressure to achieve beneficial effects in long term outcomes. Several goals of antihypertensive treatment remain unrealized. There is so great interest for new drugs that may protect target organs and improve outcomes. The angiotensin II, the major effector of the renin-angiotensin-aldosterone system, causes a variety of potentially noxious cardiovascular effects which are specially mediated by AT1 subtype receptors. AT1 receptor blockers (losartan, candesartan, irbesartan, valsartan) are available drugs in the angiotensin-II-antagonist class. This paper examine the peculiar features of this new class of drugs.