Check this:
http://www.professionalmuscle.com/forums/showthread.php?t=6435
Not saying he is right, just pointing out that others have also said aldosterone blockers aren't "true diuretics".
huh, well true diuretic or not i believe we are using it for that purpose...and by defination "A substance or drug that tends to increase the discharge of urine." i would think aldactone fits the bill....
that is interesting though, i didnt realize others considered it as a non diuretic, but i can see why one would think so....