I started avodart, an antiandrogen, in March of 2006. It didn't make any changes to my erectile function, or my libido for that matter.
I started a low dose of Spironolactone in September of 2006 - That did affect function (which I was grateful for) but not completely. Morning surprises were still uncomfortably frequent. My libido took a hit but wasn't completely eliminated, once again, that was something I was grateful for.
Now, after almost 9 months and having my spiro dose doubled, I'm troubled no more by those things.
YMMV!
hugs & smiles
helen