<prompt> Aliskiren isAldosteron antagonistsReninAngiotensin antagonistBradykinin analogueProstacyclin analogue  <response>: Renin Angiotensin antagonist: 508.562- KDT 7th editionALISKIREN is a nonpeptide which binds selectively to the catalytic site of renin and competitively blocks the access of angiotensinogen to this site - Ang I is not produced and the chain of renin angiotension system is interrupted while the concentration of renin in plasma is increased by feed back, the plasma renin activity is decreased. Ang I and Ang II level fall. Bradvkinin Antagonist HOE 140 Icatibant selective b2 antagonist FR173657 Aldosterone antagonist Spironolactone, Eplerenone Canrenone, Potassium canrenoate 