NCIt definition : A nonpeptide angiotensin II antagonist with antihypertensive activity. Irbesartan
selectively and competitively blocks the binding of angiotensin II to the angiotensin
I receptor. Angiotensin II stimulates aldosterone synthesis and secretion by adrenal
cortex, which decreases the excretion of sodium and increases the excretion of potassium.
Angiotensin II also acts as a vasoconstrictor in vascular smooth muscle. (NCI05);