Many herbs can successfully treat parasites
, including garlic, black walnut, gentian, quassia, and artemesia annua.
The one I have had the most success with is papaya seeds- about 2 tbsp of ground papaya seeds. Of course, which herbs to use depends on which parasites you have. See http://www.Umm.Edu/altmed/articles/intestinal-parasites-000097.Htm and http://www.Youtube.Com/watch?V=yrgluattmzq.