While this may be attributed to improved blood pressure control, in contrast to ACE-I drugs, aldosterone receptor antagonists do not mediate efferent renal arterial pressure and thus do not induce nephrotoxicity. Overall, data linking aldosterone receptor antagonists with renal function improvement are, to date, derived mainly from numerous small studies limited by brief follow-up periods. The long-term effect of these drugs on renal disease-associated outcomes is under investigation.