Well, you can go to the parasites forum, I think it's called?
Anyway the basic deworming herb is Black-Walnut tincture. It's usually taken with cloves and sometimes Wormwood .
Barefoot Herbalist (he has his own forum, known there as MH) sells a good dewormer that he makes.
Humaworm (also has a forum here) also has a deworming product although I'm not familiar with it.