Herbal "remedy" question

I’ve been trying to find a comprehensive site for herbal remedies, but it seems like most of them aren’t exactly thorough.

Can anyone either point me to a really good site
OR
suggest an herb (mixture) that may cause sexual dysfunction?

Thanks.

The NIH runs the National Center for Complementary and Alternative Medicine.

Likewise, check out http://www.quackwatch.org/

Alternative Medicine Homepage
http://www.pitt.edu/~cbw/altm.html